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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 1210. Отображено 183.
14-01-2021 дата публикации

METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL BY USING REDUCED SECONDARY TRANSFORM

Номер: US20210014534A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM, KOO MOONMO, SALEHIFAR MEHDI, KIM SEUNGHWAN, LIM JAEHYUN, KOO, Moonmo, SALEHIFAR, Mehdi, KIM, Seunghwan, LIM, Jaehyun
Принадлежит:

The present disclosure provides a method of reconstructing a video signal based on a reduced secondary transform, which includes: obtaining a secondary transform index from the video signal; deriving a secondary transform corresponding to the secondary transform index, wherein the secondary transform represents a reduced secondary transform, and the reduced secondary transform represents a transform outputting L (L Подробнее

Номер записи: 1
02-11-2017 дата публикации

PLANAR PREDICTION MODE

Номер: US20170316276A1
Автор: Jaehyun LIM, Byeongmoon JEON, Seungwook PARK, Jaewon SUNG, Jungsun KIM, Yongjoon JEON, Joonyoung PARK, Younghee CHOI
Принадлежит:

New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples.

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Номер записи: 2
21-04-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE

Номер: US20220124351A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to the present disclosure includes deriving transform coefficients through dequantization based on the quantized transform coefficients for the target block; deriving modified transform coefficients based on an inverse reduced secondary transform (RST) for the transform coefficients; deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; and generating a reconstructed samples based on the residual samples, and prediction samples derived based on an intra prediction mode for the target block, wherein the inverse RST is performed based on a transform kernel matrix selected from a transform set including a plurality of transform kernel matrices, the transform set is determined based on a mapping relationship according to the intra prediction mode applied to the target block, and a plurality of intra prediction modes including the intra prediction mode of the target block are mapped to ...

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Номер записи: 3
16-02-2023 дата публикации

TRANSFORM FOR MATRIX-BASED INTRA-PREDICTION IN IMAGE CODING

Номер: US20230047743A1
Автор: Junghak NAM, Jaehyun LIM, Moonmo KOO, Seunghwan KIM
Принадлежит:

An image coding method according to the present document comprises the steps of: deriving transform coefficients for a current block on the basis of residual-related information; and generating residual samples of the current block on the basis of the transform coefficients. The residual-related information comprises low frequency non-separable transform (LFNST) index information, showing information relating to non-separable transform for low-frequency transform coefficients of the current block, on the basis of a matrix-based intra-prediction (MIP) flag showing whether or not MIP is applied to the current block. The residual samples are generated from the transform coefficients on the basis of the LFNST index information.

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Номер записи: 4
04-01-2024 дата публикации

INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

Номер: US20240007646A1
Автор: Naeri PARK, Junghak NAM, Jaehyun LIM, Seunghwan KIM, Jungdong SEO, Jaeho LEE, Hyeongmoon JANG
Принадлежит:

An image decoding method performed by a decoding apparatus includes the operations: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block based on a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

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Номер записи: 5
17-03-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20220086448A1
Автор: Moonmo KOO, Jaehyun LIM, Junghak NAM, Seunghwan KIM
Принадлежит:

An image decoding method, according to the present document, may comprise the steps of: deriving transform coefficients for a current block on the basis of residual information; determining whether a significant coefficient is present in a second region excluding a first region in the top-left end of the current block; parsing a LFNST index from a bitstream if the significant coefficient is not present in the second region; deriving modified transform coefficients by applying a LFNST matrix, derived on the basis of the LFNST index, to transform coefficients of the first region; and deriving residual samples of the current block on the basis of an inverse primary transform of the modified transform coefficients. 1. An image decoding method performed by a decoding apparatus , the method comprising:obtaining residual information from a bitstream;deriving transform coefficients for a current block based on the residual information;determining whether a significant coefficient exists in a second region other than a first region at the top-left of the current block;parsing an LFNST index from the bitstream based on the significant coefficient not existing in the second region;deriving modified transform coefficients by applying an LFNST matrix derived based on the LFNST index to the transform coefficients in the first region;deriving residual samples for the current block based on an inverse primary transform for the modified transform coefficients; andgenerating a reconstructed picture based on the residual samples for the current block.2. The image decoding method of claim 1 , wherein the first region is derived based on the size of the current block claim 1 , wherein based on the size of the current block being 4×4 or 8×8 claim 1 , the first region is from the top-left of the current block to the 8th sample position in a scan direction claim 1 , and wherein based on the size of the current block being not 4×4 or 8×8 claim 1 , the first region is a 4×4 area at the top- ...

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Номер записи: 6
16-02-2023 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD, AND APPARATUS THEREFOR

Номер: US20230049623A1
Автор: Moonmo KOO, Jaehyun LIM, Seunghwan KIM, Mehdi SALEHIFAR
Принадлежит:

An image decoding method according to the present document comprises: a residual coding step for parsing residual information received in a residual coding level and arranging transform coefficients for a current block according to a predetermined scanning order; a step for deriving residual samples by applying at least one of LFNST or MTS to the transform coefficients; and a step for generating a reconstructed picture on the basis of the residual samples, wherein the LFNST is performed on the basis of an LFNST index indicating an LFNST kernel, the MTS is performed on the basis of an MTS index indicating an MTS kernel, the LFNST index and the MTS index are signaled in a coding unit level, and the MTS index is signaled immediately after the signaling of the LFNST index.

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Номер записи: 7
05-01-2023 дата публикации

IMAGE CODING APPARATUS AND METHOD THEREOF BASED ON A QUANTIZATION PARAMETER DERIVATION

Номер: US20230007258A1
Автор: Seunghwan KIM, Jaehyun LIM
Принадлежит:

According to an embodiment of the present invention, a picture decoding method performed by a decoding apparatus is provided. The method comprises: decoding image information comprising information on a quantization parameter (QP), deriving an expected average luma value of a current block from neighboring available samples, deriving a quantization parameter offset (QP offset) for deriving a luma quantization parameter (luma QP) based on the expected average luma value and the information on the QP, deriving the luma QP based on the QP offset, performing an inverse quantization for a quantization group comprising the current block based on the derived luma QP, generating residual samples for the current block based on the inverse quantization, generating prediction samples for the current block based on the image information and generating reconstructed samples for the current block based on the residual samples for the current block and the prediction samples for the current block.

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Номер записи: 8
28-09-2023 дата публикации

IMAGE CODING METHOD AND APPARATUS BASED ON INTRA PREDICTION USING MPM LIST

Номер: US20230308636A1
Автор: Ling LI, Jaehyun LIM, Jin HEO, Jangwon CHOI, Seunghwan KIM
Принадлежит:

An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving intra prediction information including at least one of most probable mode (MPM) flag information representing whether to derive an intra prediction mode for a current block based on MPM candidates for the current block or planar flag information representing whether to determine the intra prediction mode for the current block as a planar mode, deriving the intra prediction mode for the current block based on the MPM flag information and the planar flag information, deriving a predicted block for the current block based on the intra prediction mode for the current block, and generating a reconstructed picture based on the predicted block.

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Номер записи: 9
09-06-2022 дата публикации

IMAGE CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR

Номер: US20220182677A1
Автор: Moonmo KOO, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: deriving transform coefficients through inverse quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) for the transform coefficients; and generating, on the basis of an inverse primary transform for the modified transform coefficients, a restoration picture based on residual samples for the target block, wherein the modified transform coefficients derived according to the inverse RST are two-dimensionally arranged according to the order of a row priority direction or a column priority direction according to an intra prediction mode to be applied to the target block.

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Номер записи: 10
14-06-2018 дата публикации

METHOD AND APPARATUS FOR INTER PREDICTION ON BASIS OF VIRTUAL REFERENCE PICTURE IN VIDEO CODING SYSTEM

Номер: US20180167610A1
Автор: Seoungwook PARK, Jaehyun LIM, Yongjoon JEON, Eunyong SON
Принадлежит:

An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: configuring a reference picture set for a current picture; generating a virtual reference picture corresponding to an original reference picture in the reference picture set; deriving a motion vector for a current block in the current picture; and generating a prediction sample for the current block on the basis of the motion vector and the virtual reference picture. According to the present invention, the performance of inter prediction can be enhanced on the basis of a virtual reference picture having higher correlation with a current picture, and accordingly the amount of data allocated to a residual signal can be reduced and the overall coding efficiency can be improved.

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Номер записи: 11
07-04-2022 дата публикации

METHOD FOR ENCODING/DECODING VIDEO SIGNALS AND APPARATUS THEREFOR

Номер: US20220109879A1
Автор: Moonmo KOO, Seunghwan KIM, Mehdi SALEHIFAR, Jaehyun LIM
Принадлежит:

Disclosed is a method for encoding/decoding video signals and an apparatus therefor. Specifically, a method for decoding a video signal based on reduced transform comprised the steps of: obtaining, from the video signal, a transform index indicating transform kernels applied to horizontal and vertical directions of a current block; determining a region in which a transform is applied to the current block based on the transform kernels indicated by the transform index and a size of the current block; deriving, as zero, coefficients of a remaining region other than the region to which the transform is applied within the current block; and performing an inverse transform on the region to which the transform is applied using the transform kernels indicated by the transform index.

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Номер записи: 12
13-06-2024 дата публикации

METHOD FOR PREPARING PIXEL DEFINE LAYER

Номер: US20240192594A1
Автор: Jun Ki KIM, Changmin LEE, Yeon Soo LEE, Jun BAE, Jaehyun LIM, Wook SONG, Soung Yun MUN, Kyung Soo KIM
Принадлежит: DUK SAN NEOLUX CO., LTD.

An object of the present disclosure is to implement a coloring pattern with a high optical density on an electrode substrate to improve display reliability and lifetime as well as vivid colors as a display with high resolution. That is, the pixel having a size within the range according to the present disclosure can implement high resolution of a Black PDL and can manufacture a display with high luminance and long lifetime according to driving voltage and current.

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Номер записи: 13
04-11-2021 дата публикации

INTER-PREDICTION MODE BASED IMAGE PROCESSING METHOD, AND APPARATUS THEREFOR

Номер: US20210344926A1
Автор: Jaehyun LIM, Naeri PARK
Принадлежит:

In the present invention, an inter-prediction mode based image processing method and an apparatus therefor are disclosed. Specifically, the inter-prediction based image processing method may comprise the steps of: deriving movement information of a control point for specifying a reference block of a current block; dividing the current block into sub-blocks; deriving movement information of the sub-blocks using the movement information of the control point; and generating a prediction block for each sub-block using the movement information of the sub-blocks.

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Номер записи: 14
08-12-2022 дата публикации

APPARATUS FOR PERFORMING IMAGE CODING ON BASIS OF ATMVP CANDIDATE

Номер: US20220394290A1
Автор: Hyeongmoon JANG, Junghak NAM, Jaehyun LIM
Принадлежит:

A method for image decoding performed by a decoding apparatus according to the present disclosure comprises the steps of: deriving an ATMVP candidate for a current block; deriving merge candidates for the current block; deriving prediction samples for the current block on the basis of the merge candidates and the ATMVP candidate; and deriving reconstruction samples for the current block on the basis of the prediction samples, wherein the ATMVP candidate is a spatial neighboring block spatially adjacent to the current block.

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Номер записи: 15
15-09-2022 дата публикации

METHOD FOR PARTITIONING BLOCK AND DECODING DEVICE

Номер: US20220295097A1
Автор: Jungsun KIM, Seungwook PARK, Jaewon SUNG, Joonyoung PARK, Byeongmoon JEON, Jaehyun LIM, Yongjoon JEON, Younghee CHOI
Принадлежит:

Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency.

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Номер записи: 16
18-10-2018 дата публикации

Method for Intra Prediction and Device Therefor

Номер: US20180302646A1
Автор: Jaehyun LIM, Seungwook PARK, Yongjoon JEON, Jungsun KIM, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK, Chulkeun KIM, Naeri PARK, LIM JAEHYUN, PARK SEUNGWOOK, JEON YONGJOON, KIM JUNGSUN, HENDRY HENDRY, JEON BYEONGMOON, PARK JOONYOUNG, KIM CHULKEUN, PARK NAERI, LIM, Jaehyun, PARK, Seungwook, JEON, Yongjoon, KIM, Jungsun, HENDRY, Hendry, JEON, Byeongmoon, PARK, Joonyoung, KIM, Chulkeun, PARK, Naeri
Принадлежит:

A method for intra prediction comprises determining a first MPM candidate corresponding to a left-side candidate block on the basis of a position of the left-side candidate block adjacent to a left side of a current block; determining a second MPM candidate corresponding to an upper-end candidate block on the basis of a position of the upper-end candidate block adjacent to an upper end of the current block; generating an MPM candidate list including a plurality of MPM candidates, on the basis of the first MPM candidate and the second MPM candidate; and determining one MPM candidate of the plurality of the MPM candidates that constitute the MPM candidate list as an intra prediction mode of the current block, and performing intra prediction for the current block on the basis of the determined intra prediction mode to generate a prediction block corresponding to the current block.

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Номер записи: 17
13-08-2020 дата публикации

METHOD AND APPARATUS FOR INTER PREDICTION IN VIDEO CODING SYSTEM

Номер: US20200260101A1
Автор: Naeri PARK, Jaehyun LIM, Junghak NAM, PARK NAERI, LIM JAEHYUN, NAM JUNGHAK, PARK, Naeri, LIM, Jaehyun, NAM, Junghak
Принадлежит:

A video decoding method performed by a decoding apparatus comprises deriving control points (CPs) for the current block; obtaining motion vectors for the CPs; deriving a motion vector of a sub-block or a sample unit in the current block on the basis of the obtained motion vectors; deriving a prediction sample for the current block on the basis of the derived motion vector; and generating a reconstruction sample on the basis of the prediction sample. The method enables effective performance of inter prediction through the motion vectors (transformation prediction), not only when an image in the current block is moved in a plane, but also when the image in the current block is rotated, zoomed in, zoomed out, or transformed into a parallelogram. Accordingly, the amount of data for the residual signal for the current block can be eliminated or reduced, and the overall coding efficiency can be improved.

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Номер записи: 18
03-11-2022 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE INFORMATION

Номер: US20220353541A1
Автор: Seungwook PARK, Jungsun KIM, Yongjoon JEON, Joonyoung PARK, Byeongmoon JEON, Jaehyun LIM
Принадлежит:

The present invention relates to a method for encoding and decoding image information and to an apparatus using same, and the method for encoding the image information, according to the present invention, comprises the steps of: generating a recovery block; applying a deblocking filter to the recovery block; applying a sample adaptive offset (SAO) to the recovery block to which the deblocking filter is applied; and transmitting the image information including information on the SAO which is applied, wherein in the step of transmitting, information for specifying bands that cover a scope of a pixel value, to which a band off set is applied, is transmitted when the band offset is applied during the step of applying the SAO.

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Номер записи: 19
28-04-2022 дата публикации

FINGERPRINT SENSOR PACKAGE AND SMARTCARD INCLUDING THE SAME

Номер: US20220129657A1
Автор: Jaehyun LIM, Younghwan PARK, Kwangjin LEE, Inho CHOI, Hyuntaek CHOI
Принадлежит: Samsung Electronics Co., Ltd.

A fingerprint sensor package includes a package substrate including an upper surface in which a sensing region and a peripheral region surrounding the sensing region are defined, and a lower surface facing the upper surface; a plurality of first sensing patterns located are arranged in the sensing region, are apart from each other in a first direction, and extend in a second direction crossing the first direction; a plurality of second sensing patterns that are arranged in the sensing region, are apart from each other in the second direction, and extend in the first direction; a coating member covering the sensing region; an upper ground pattern in the peripheral region and apart from the coating member to surround the coating member in the first and second directions; and a controller chip on the lower surface of the package substrate; and a plurality of capacitors.

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Номер записи: 20
21-11-2019 дата публикации

INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

Номер: US20190356922A1
Автор: Naeri PARK, Junghak NAM, Jaehyun LIM, Seunghwan KIM, Jungdong SEO, Jaeho LEE, Hyeongmoon JANG
Принадлежит:

An image decoding method carried out by a decoding apparatus according to the present invention comprises the steps of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block on the basis of a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated on the basis of the scaled movement vector and location of the current block; and deriving a movement vector of the current block on the basis of the updated movement ...

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Номер записи: 21
08-10-2020 дата публикации

METHOD AND APPARATUS FOR PERFORMING LOW COMPLEXITY COMPUTATION IN TRANSFORM KERNEL FOR VIDEO COMPRESSION

Номер: US20200322604A1
Автор: Bumshik LEE, Moonmo KOO, Jaehyun LIM
Принадлежит:

The present disclosure relates to a method for processing a video signal by using a linear relationship between transform types, comprising the steps of: determining a transform group on the basis of a prediction mode of a current block; parsing a transform combination index from a video signal, wherein the transform combination index indicates anyone of a plurality of transform combinations in the transform group; deriving a transform combination corresponding to the transform combination index, wherein the transform combination consists of a horizontal transform and a vertical transform, and includes DST-7 or DCT-8; performing inverse transform on the current block on the basis of the transform combination; and restoring the video signal by using the inverse transformed current block.

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Номер записи: 22
04-04-2019 дата публикации

METHOD AND DEVICE FOR DERIVING BLOCK STRUCTURE IN VIDEO CODING SYSTEM

Номер: US20190104312A1
Автор: Jaehyun LIM, Naeri PARK, LIM JAEHYUN, PARK NAERI, LIM, Jaehyun, PARK, Naeri
Принадлежит:

A video decoding method performed by a decoding device, according to the present invention, comprises the steps of: deriving at least one reference block for an object block; deriving a partitioned structure of the object block on the basis of a partitioned structure of the at least one reference block; partitioning the object block into a plurality of sub blocks on the basis of the derived partitioned structure; and generating recovered samples by decoding the plurality of sub blocks. According to the present invention, a partitioned structure of a current picture can be derived on the basis of a reference block of a neighboring picture, and thus the amount of data used in the additional information signaled for partitioning of the current picture can be reduced and overall coding efficiency can be improved. 1. A video decoding method performed by a decoding apparatus , the video decoding method comprising:deriving at least one reference block for a target block;deriving a division structure of the target block based on a division structure of the at least one reference block;dividing the target block into a plurality of blocks based on the derived division structure; anddecoding the plurality of blocks to generate reconstructed samples.2. The video decoding method of claim 1 , wherein the at least one reference block is located in a temporally neighboring picture of the current picture in which the target block is located.3. The video decoding method of claim 1 , further comprising:obtaining a block structure prediction flag from a bitstream,wherein the division structure of the target block is derived based on the division structure of the at least one reference block when a value of the obtained block structure prediction flag is 1.4. The video decoding method of claim 1 , wherein the at least one reference block comprises a first reference block and a second reference block claim 1 , andwherein the division structure of the target block is derived based on the ...

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Номер записи: 23
15-06-2023 дата публикации

IMAGE CODING METHOD AND DEVICE IN IMAGE CODING SYSTEM

Номер: US20230188758A1
Автор: Jungah CHOI, Jaehyun LIM, Sunmi YOO, Jangwon CHOI, Seunghwan KIM
Принадлежит:

A method for decoding an image by a decoding device, according to the present document, comprises the steps of: acquiring image information; and generating a reconstructed picture on the basis of the image information.

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Номер записи: 24
12-05-2022 дата публикации

IMAGE CODING METHOD AND DEVICE ON BASIS OF WIDE-ANGLE INTRA PREDICTION AND TRANSFORM

Номер: US20220150504A1
Автор: Moonmo KOO, Jaehyun LIM, Junghak NAM, Seunghwan KIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: obtaining intra prediction mode information and an LFNST index; deriving an intra prediction mode of a current block on the basis of intra prediction mode information; when wide-angle intra prediction is applied to the current block, deriving a modified intra prediction mode by means of intra prediction mode remapping; deciding an LFNST set comprising LFNST matrices on the basis of the modified intra prediction mode; selecting one of the LFNST matrices on the basis of the LFNST set and LFNST index; and deriving transform coefficients for the current block on the basis of the selected LFNST matrix. 1. An image decoding method performed by a decoding apparatus , the method comprising:obtaining intra prediction mode information and an LFNST index from a bitstream;deriving an intra prediction mode for a current block based on the intra prediction mode information;deriving a modified intra prediction mode through intra prediction mode remapping based on wide-angle intra prediction being applied to the current block;determining an LFNST set comprising LFNST matrices based on the modified intra prediction mode;selecting one of the LFNST matrices based on the LFNST set and the LFNST index;deriving transform coefficients for the current block based on the selected LFNST matrix; andderiving residual samples for the current block based on the transform coefficients,wherein the current block comprises a transform block or a coding block, andwherein the wide-angle intra prediction is applied to the current block based on a height and width of the current block being not the same.24.-. (canceled)5. The image decoding method of claim 1 , wherein the modified intra prediction mode is derived based on which of the height and width of the current block is greater claim 1 , a ratio between the height and width of the current block claim 1 , and the intra prediction mode.6. The image decoding method of ...

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Номер записи: 25
09-06-2022 дата публикации

IMAGE OR VIDEO CODING BASED ON SUB-PICTURE HANDLING STRUCTURE

Номер: US20220182681A1
Автор: Seethal PALURI, Jongyeul SUH, Jaehyun LIM, Seunghwan KIM
Принадлежит:

According to the disclosure of the present document, an image/video coding procedure may be performed on the basis of a sub-picture partitioning structure, and encoded image/video information may include individual information on each of subpictures. In addition, output sub-picture sets, each including sub-pictures, may be used for encoding or decoding of an image/video, whereby the overall image/video compression efficiency can be improved and the subjective/objective visual quality can be improved.

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Номер записи: 26
10-03-2022 дата публикации

IMAGE DECODING METHOD FOR CODING RESIDUAL INFORMATION ON BASIS OF HIGH FREQUENCY ZEROING IN IMAGE CODING SYSTEM, AND DEVICE THEREFOR

Номер: US20220078432A1
Автор: Jungah CHOI, Jaehyun LIM, Jin HEO, Sunmi YOO, Ling Li, Jangwon CHOI, Seunghwan KIM
Принадлежит:

A method by which a decoding device decodes an image, according to the present document, comprises the steps of: receiving a bitstream including residual information about a current block; decoding syntax elements for the current block included in the residual information; deriving conversion coefficients for the current block on the basis of the decoded syntax elements; deriving residual samples for the current block on the basis of the conversion coefficients; and generating a restoration picture on the basis of the residual samples. 1. An image decoding method performed by a decoding apparatus , comprising:receiving bitstream including residual information of a current block;decoding syntax elements for the current block included in the residual information;deriving transform coefficients for the current block based on the decoded syntax elements;deriving residual samples for the current block based on the transform coefficients; andgenerating a reconstructed picture based on the residual samples,wherein each of the transform coefficients for the current block is related to a high-frequency transform coefficient region consisting of zero transform coefficients or a low-frequency transform coefficient region including at least one significant transform coefficient,wherein the syntax elements include last significant coefficient prefix information for a position of a last significant transform coefficient among the transform coefficients for the current block, andwherein a context model for the significant coefficient prefix information is derived based on a height and width of the low-frequency transform coefficient region.2. The image decoding method of claim 1 ,wherein the residual information includes a coded subblock flag representing whether transform coefficient levels of transform coefficients for a subblock within the current block is equal to 0, andwherein the subblock is related to a low-frequency transform coefficient region.3. The image decoding method ...

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Номер записи: 27
16-06-2022 дата публикации

CONTEXT CODING FOR INFORMATION ON TRANSFORM KERNEL SET IN IMAGE CODING SYSTEM

Номер: US20220191500A1
Автор: Junghak NAM, Moonmo KOO, Jaehyun LIM, Seunghwan KIM
Принадлежит:

An image decoding method, according to the present document, comprises a step of generating residual samples for a current block on the basis of residual information, wherein the residual samples are generated on the basis of information on a transform kernel set and transform coefficients for the current block, the transform coefficients are derived on the basis of the residual information, and the information on the transform kernel set represents a transform kernel set to be applied to the current block from among transform kernel set candidates. At least one bin from among bins of a bin string of the information on the transform kernel set is derived on the basis of context coding, and the context coding is performed on the basis of at least one context model.

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Номер записи: 28
07-12-2023 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNALS USING REDUCED TRANSFORM

Номер: US20230396788A1
Автор: Seunghwan KIM, Mehdi SALEHIFAR, Moonmo KOO, Jaehyun LIM
Принадлежит:

Provided is a method for decoding a video signal based on a reduced transform, which includes: checking whether a transform skip is applied to a current block; obtaining a transform index indicating a transform kernel of the current block from the video signal when the transform skip is not applied to the current block; determining a region where a primary transform is applied to the current block based on the transform kernel indicated by the transform index and a size of the current block; and performing an inverse primary transform on the region to which the primary transform is applied by using the transform kernel indicated by the transform index.

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Номер записи: 29
11-04-2024 дата публикации

INTRA-PREDICTION MODE-BASED IMAGE PROCESSING METHOD AND DEVICE THEREFOR

Номер: US20240121386A1
Автор: Hyeongmoon JANG, Junghak NAM, Jaehyun LIM, Jin HEO
Принадлежит:

Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.

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Номер записи: 30
28-04-2022 дата публикации

METHOD FOR CODING IMAGE ON BASIS OF DEBLOCKING FILTERING, AND APPARATUS THEREFOR

Номер: US20220132133A1
Автор: Hyeongmoon JANG, Jaehyun LIM, Junghak NAM
Принадлежит:

A method for decoding an image, according to the present document, comprises: receiving a bitstream including BDPCM information; deriving residual samples for a current block on the basis of the BDPCM information; deriving prediction samples for the current block on the basis of the BDPCM information; generating a reconstructed picture on the basis of the residual samples and the prediction samples; and performing deblocking filtering on the reconstructed picture, wherein when BDPCM is applied to the current block, the deblocking filtering is not performed.

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Номер записи: 31
23-08-2018 дата публикации

METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE INFORMATION

Номер: US20180242022A1
Автор: Seungwook PARK, Jaehyun LIM, Yongjoon JEON, Chulkeun KIM, Jungsun KIM, Naeri PARK, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK
Принадлежит:

The present invention relates to a deblocking filtering method, a method for inducing bs (boundary strength) therefor, and a method and an apparatus for encoding/decoding using the same. The method for inducing the bS of the present invention comprises the steps of: inducing a boundary of a deblocking filtering unit block as a unit block for applying the deblocking filtering; and setting the bS according to each bS setting unit block within the deblocking filtering unit block, wherein the bS setting step can set a bS value for a target boundary corresponding to a boundary of the deblocking filtering unit block as the bs setting unit block ...

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Номер записи: 32
13-08-2020 дата публикации

IMAGE CODING APPARATUS AND METHOD THEREOF BASED ON A QUANTIZATION PARAMETER DERIVATION

Номер: US20200260084A1
Автор: Seunghwan KIM, Jaehyun LIM, KIM SEUNGHWAN, LIM JAEHYUN, KIM, Seunghwan, LIM, Jaehyun
Принадлежит:

According to an embodiment of the present invention, a picture decoding method performed by a decoding apparatus is provided. The method comprises: decoding image information comprising information on a quantization parameter (QP), deriving an expected average luma value of a current block from neighboring available samples, deriving a quantization parameter offset (QP offset) for deriving a luma quantization parameter (luma QP) based on the expected average luma value and the information on the QP, deriving the luma QP based on the QP offset, performing an inverse quantization for a quantization group comprising the current block based on the derived luma QP, generating residual samples for the current block based on the inverse quantization, generating prediction samples for the current block based on the image information and generating reconstructed samples for the current block based on the residual samples for the current block and the prediction samples for the current block.

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Номер записи: 33
27-07-2023 дата публикации

METHOD FOR ENCODING AND DECODING VIDEO, AND APPARATUS USING SAME

Номер: US20230239493A1
Автор: Jaehyun LIM, Jungsun KIM, Seungwook PARK, Jaewon SUNG, Byeongmoon JEON, Joonyoung PARK, Yongjoon JEON, Younghee CHOI
Принадлежит:

The present invention relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present invention comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected ...

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Номер записи: 34
25-05-2023 дата публикации

IN-LOOP FILTERING-BASED IMAGE CODING DEVICE AND METHOD

Номер: US20230164321A1
Автор: Hendry HENDRY, Naeri PARK, Hyeongmoon JANG, Jaehyun LIM, Junghak NAM, Seunghwan KIM
Принадлежит:

According to embodiments of the present document, information for performing in-loop filtering across boundaries can be efficiently signaled. For example, the boundaries may include boundaries of tiles, slices, and/or sub-pictures.

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Номер записи: 35
14-07-2022 дата публикации

IMAGE ENCODING/DECODING METHOD AND DEVICE USING AFFINE TMVP, AND METHOD FOR TRANSMITTING BIT STREAM

Номер: US20220224912A1
Автор: Nae Ri PARK, Jung Hak NAM, Hyeong Moon JANG, Jaehyun LIM, Seung Hwan KIM
Принадлежит:

An image encoding/decoding apparatus and method are provided. An image decoding method performed by an image decoding apparatus according to the present disclosure may comprise deriving a motion shift of a current block using motion information of a neighboring block of the current block, determining a collocated block of the current block using the motion shift, deriving a motion vector for at least one control point (CP) of the determined collocated block, and deriving at least one control point motion vector (CPMV) of the current block using the motion vector for the at least one CP.

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Номер записи: 36
05-10-2023 дата публикации

VIDEO ENCODING AND DECODING METHOD AND APPARATUS USING SAME

Номер: US20230319320A1
Автор: Hendry HENDRY, Byeongmoon JEON, Yongjoon JEON, Seungwook PARK, Jungsun KIM, Joonyoung PARK, Jaehyun LIM, Naeri PARK, Chulkeun kim
Принадлежит:

The present invention relates to video encoding and decoding method and apparatus, and a video encoding method according to the present invention comprises the steps of: entropy-encoding quantized transform information; and transmitting the entropy-encoded information as a bitstream, wherein the bitstream includes information indicating pieces of information to be parallel decoded in byte units.

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Номер записи: 37
08-02-2024 дата публикации

BDPCM-BASED IMAGE DECODING METHOD FOR LUMA COMPONENT AND CHROMA COMPONENT, AND DEVICE FOR SAME

Номер: US20240048713A1
Автор: Jungah CHOI, Sunmi YOO, Jaehyun LIM, Jangwon CHOI, Seunghwan KIM
Принадлежит:

An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring a block-based delta pulse code modulation (BDPCM) available flag about whether a BDPCM is available for a chroma block and a luma block; acquiring, on the basis of the BDPCM available flag, a BDPCM luma flag about whether to apply the BDPCM to the current luma block; and acquiring, on the basis of the BDPCM available flag, a BDPCM chroma flag about whether to apply the BDPCM to the current chroma blocks.

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Номер записи: 38
21-06-2018 дата публикации

METHOD AND DEVICE FOR PREDICTING BLOCK ON BASIS OF ILLUMINATION COMPENSATION IN IMAGE CODING SYSTEM

Номер: US20180176592A1
Автор: Jaehyun LIM, Seungwook PARK, Junghak NAM
Принадлежит:

A block prediction method for decoding a picture, according to the present invention, comprises the steps of: deriving a reference block from a reference picture to predict a current block in a current picture; determining a reference illumination compensation (IC) parameter; generating an illumination-compensated reference block by applying reference IC to the reference block on the basis of the reference IC parameter; and generating a predicted sample of the current block on the basis of the illumination-compensated reference block. According to the present invention, an illumination difference between the current block of the current picture and the reference block of the reference picture can be compensated for, block prediction efficiency can be increased, and a data amount of a residual signal to be transmitted from an encoder to a decoder is reduced. Therefore, compression and coding efficiency can be increased.

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Номер записи: 39
28-03-2013 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20130077689A1
Автор: Jaehyun LIM, Jungsun KIM, Seungwook PARK, Jaewon SUNG, Byeongmoon JEON, Joonyoung PARK, Yongjoon JEON, Younghee CHOI
Принадлежит: LG Electronics Inc.

The present invention relates to a method and apparatus for encoding or decoding a video signal. According to the present invention, a plurality of reference units for image prediction of the current unit is acquired and combined to obtain a unit prediction value, thereby improving the accuracy of image prediction. More particularly, the present invention relates to a method for inducing a variety of reference units using a motion vector prediction value or a motion vector which is used in conventional inter-prediction, and also relates to a method which combines the reference units so as to obtain the prediction value for the current unit. In addition, the present invention relates to a method which involves acquiring a plurality of reference units for a merging mode, and combining the reference units so as to perform image prediction. 1. A method of decoding video data in a coded video data bitstream with a decoding apparatus , the method comprising:obtaining, with the decoding apparatus, merge indication information from the coded video data bitstream, the merge indication information indicating whether inter prediction information of a current block is derived from inter prediction information of a neighboring block adjacent to the current block;constructing, with the decoding apparatus, a merging candidate list based on the merge indication information, the merging candidate list including a plurality of merging candidates, the merging candidates including inter prediction information of neighboring blocks;deriving, with the decoding apparatus, from the neighboring blocks, a supplementary merging candidate having inter prediction information for bi-prediction,wherein the deriving the supplementary merging candidate comprises:extracting, with the decoding apparatus, inter prediction information for first-direction prediction from one of the neighboring blocks;extracting, with the decoding apparatus, inter prediction information for second-direction prediction ...

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Номер записи: 40
15-06-2023 дата публикации

IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20230188707A1
Автор: Hendry HENDRY, Hyeongmoon JANG, Junghak NAM, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to the present document comprises a step of deriving POC values for the current picture and reference pictures on the basis of POC information, wherein the POC information includes a maximum LSB value of POC, information about the reference pictures includes a non-reference picture flag related to whether a picture is not used as a reference picture, the value of the non-reference picture flag of the previous picture used for deriving the POC value of the current picture is zero, and the difference between the POC values of the current picture and the previous picture is less than half of the maximum LSB value of POC.

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Номер записи: 41
25-05-2023 дата публикации

METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL

Номер: US20230164309A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

Embodiments of the present invention provide a method and apparatus for processing a video signal. A method for decoding an image signal according to an embodiment of the present invention comprises the steps of: for a current block having a width and a height different from each other, determining a modified intra prediction mode from an intra prediction mode, on the basis of a ratio between the width and the height of the current block and the intra prediction mode; determining an inverse non-separable transform set on the basis of the modified intra prediction mode; and applying an inverse non-separable transform matrix selected from the inverse non-separable transform set with respect to the top-left region of the current block, which is determined according to the width and the height of the current block.

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Номер записи: 42
23-06-2022 дата публикации

METHOD AND DEVICE FOR DECODING IMAGE BY USING INTRA PREDICTION MODE CANDIDATE LIST IN IMAGE CODING SYSTEM

Номер: US20220201279A1
Автор: Jangwon CHOI, Jin HEO, Seunghwan KIM, Jaehyun LIM, Ling LI
Принадлежит:

A method for decoding an image by a decoding device according to the present document comprises the steps of: receiving prediction-related information of a current block; deriving an intra prediction type of the current block on the basis of the prediction-related information; forming an intra prediction mode candidate list of the current block on the basis of intra prediction modes of blocks neighboring the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and deriving reference samples of the current block on the basis of the intra prediction type and the intra prediction mode, and deriving a prediction sample on the basis of the reference samples.

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Номер записи: 43
02-05-2024 дата публикации

INTRA-PREDICTION METHOD, AND ENCODER AND DECODER USING SAME

Номер: US20240146960A1
Автор: Joonyoung PARK, Seungwook PARK, Jaehyun LIM, Jungsun KIM, Younghee CHOI, Byeongmoon JEON, Yongjoon JEON
Принадлежит:

The present invention relates to an intra-prediction method and to an encoder and decoder using same. The intra-prediction method according to one embodiment of the present invention comprises the steps of deriving a prediction mode of a current block; and generating a prediction block with respect to the current block on the basis of the prediction mode of the current block. When the prediction mode of the current block is an intra-angular prediction mode, values of boundary samples from among left boundary samples and upper boundary samples of the prediction block, which are not positioned in a prediction direction of the intra-angular prediction mode, are derived on the basis of reference samples positioned in the prediction direction of the intra-angular prediction mode, and on the basis of adjacent reference samples.

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Номер записи: 44
12-08-2021 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20210250588A1
Автор: Seungwook PARK, Joonyoung PARK, Jungsun KIM, Younghee CHOI, Yongjoon JEON, Jaewon SUNG, Byeongmoon JEON, Jaehyun LIM
Принадлежит:

The present invention discloses a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention uses a merging mode in which prediction information on a neighbor unit is used instead of transmitting prediction information on the present unit, so as to improve coding efficiency. In this case, the number of available candidate units for merging among the units in a predetermined position is determined, and information for the merging mode is acquired on the basis of the number of the available candidate units for merging. The unit to be merged is determined using the information for the merging mode, and prediction information on the unit to be merged is acquired. The prediction value for the present unit is acquired using the prediction information on the unit to be merged, and the present unit is restored using the acquired prediction value.

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Номер записи: 45
21-01-2021 дата публикации

METHOD FOR PROCESSING IMAGE AND APPARATUS THEREFOR

Номер: US20210021848A1
Автор: Junghak NAM, Seunghwan KIM, Jaehyun LIM, NAM JUNGHAK, KIM SEUNGHWAN, LIM JAEHYUN, NAM, Junghak, KIM, Seunghwan, LIM, Jaehyun
Принадлежит:

A video decoding method includes: when a current block satisfies a preconfigured condition, parsing a first syntax element indicating whether the current block is split into a plurality of sub-blocks; when the first syntax element indicates that the current block is split, parsing a second syntax element indicating whether the current block is split using a quad-tree structure; when the second syntax element indicates that the current block is not split using the quad-tree structure, parsing at least one of a third syntax element indicating whether the current block is split using a binary-tree structure or a ternary-tree structure and a fourth syntax element indicating a split direction of the current block; and determining a split mode of the current block based on at least one of the first syntax element, the second syntax element, the third syntax element and the fourth syntax element. 1. A video decoding method , comprising:parsing a first syntax element including information whether a current block is split into a plurality of sub-blocks, based on that the current block satisfies a preconfigured condition;parsing a second syntax element including information whether the current block is split based on a quad-tree structure, based on that the first syntax element includes information that the current block is split;parsing at least one of a third syntax element and a fourth syntax element, based on that the second syntax element includes information that the current block is not split based on the quad-tree structure, the third syntax element including information whether the current block is split based on a binary-tree structure or a ternary-tree structure, the fourth syntax element including information about a split direction of the current block; anddetermining a split mode of the current block based on at least one of the first syntax element, the second syntax element, the third syntax element and the fourth syntax element.2. The method of claim 1 , ...

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Номер записи: 46
07-01-2021 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO DATA

Номер: US20210006829A1
Автор: Jungsun KIM, Seungwook PARK, Jaehyun LIM, Joonyoung PARK, Younghee CHOI, Jaewon SUNG, Byeongmoon JEON, Yongjoon JEON, KIM JUNGSUN, PARK SEUNGWOOK, LIM JAEHYUN, PARK JOONYOUNG, CHOI YOUNGHEE, SUNG JAEWON, JEON BYEONGMOON, JEON YONGJOON, KIM, Jungsun, PARK, Seungwook, LIM, Jaehyun, PARK, Joonyoung, CHOI, Younghee, SUNG, Jaewon, JEON, Byeongmoon, JEON, Yongjoon
Принадлежит:

A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit. 1. A method for encoding a bitstream for a video signal by an encoding apparatus , the method comprising:determining an intra prediction mode for luma samples of a current block;encoding intra luma prediction mode information of the current block to the bitstream, the intra luma prediction mode information specifying the intra prediction mode for the luma samples of the current block;determining an intra prediction mode for chroma samples of the current block; andencoding intra chroma prediction mode information of the current block to the bitstream, the intra chroma prediction mode information specifying the intra prediction mode for the chroma samples of the current block,wherein the intra chroma prediction mode information of the current block is determined according to a predefined table based on the intra prediction mode for the luma samples of the current block and the intra prediction mode for the chroma samples of the current block, andwherein the intra chroma prediction mode information of the current block has a specific value based on the intra prediction mode for the chroma samples of the current block being equal to the intra prediction mode for the luma samples of the current block.2. The method of claim 1 , wherein the intra prediction mode is one of a horizontal prediction mode claim 1 , a vertical prediction mode claim 1 , a DC prediction mode claim 1 , or an angular prediction mode.3. The method of claim 1 , wherein the specific value is equal to 4.4. An apparatus configured to encode a bitstream for a video signal claim 1 , the apparatus comprising:an encoding unit configured to perform encoding operations comprising: ...

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Номер записи: 47
25-06-2020 дата публикации

METHOD AND DEVICE FOR DECODING IMAGE ACCORDING TO INTRA PREDICTION IN IMAGE CODING SYSTEM

Номер: US20200204814A1
Автор: Sunmi YOO, Jaehyun LIM, Jin HEO, YOO SUNMI, LIM JAEHYUN, HEO JIN, YOO, Sunmi, LIM, Jaehyun, HEO, Jin
Принадлежит:

According to the present disclosure, an image decoding method performed by a decoding device comprises the steps of: deriving a first intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving a second intra prediction mode of a target sample on the basis of a location of the target sample and the first intra prediction mode of the current block; and performing prediction for the target sample on the basis of the second intra prediction mode of the target sample.

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Номер записи: 48
01-02-2024 дата публикации

IMAGE CODING METHOD ON BASIS OF NON-SEPARABLE SECONDARY TRANSFORM AND DEVICE THEREFOR

Номер: US20240040121A1
Автор: Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM, Moonmo KOO
Принадлежит:

An image decoding method performed by means of a decoding device according to the present disclosure comprises the steps of: deriving transform coefficients of a target block from a bitstream; deriving a non-separable secondary transform (NSST) index with respect to the target block; performing inverse transform with respect to the transform coefficients of the target block on the basis of the NSST index and thus deriving residual samples of the target block; and generating a reconstructed picture on the basis of the residual samples.

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Номер записи: 49
25-05-2023 дата публикации

ENCODING/DECODING METHOD FOR VIDEO SIGNAL AND DEVICE THEREFOR

Номер: US20230164359A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

Embodiments of the present invention provide a video signal processing method and device. Particularly, a method for decoding a video signal, may comprise the steps of: checking whether a transfer skip is applied to a current block; obtaining, from a video signal, a transform index for indicating a transform type set applied to the current block when the transform skip is not applied to the current block, wherein the transform type set includes transform types applied to the current block in horizontal and vertical directions; checking whether the transform type set includes DCT2; determining a region to which a primary transform is applied based on a checking result; and performing an inverse transform on the region to which the primary transform is applied in the horizontal and vertical directions using the transform types included in the transform type set.

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Номер записи: 50
20-06-2024 дата публикации

IMAGE CODING METHOD AND APPARATUS THEREFOR

Номер: US20240205456A1
Автор: Moonmo KOO, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to this document comprises a step of deriving, for transform coefficients, modified transform coefficients on the basis of inverse secondary transform, wherein: the step of deriving the modified transform coefficients may comprise a step of deriving a transform kernel to be applied to the inverse secondary transform; on the basis of both the horizontal and vertical lengths of a target block being greater than or equal to 8 and the horizontal or vertical length being 8, the transform kernel may be set to a 64×32 matrix; and on the basis of both the horizontal and vertical lengths of the target block being 8, a 64×16 matrix sampled from the 64×32 matrix may be applied to the inverse secondary transform of the target block.

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Номер записи: 51
19-12-2019 дата публикации

NEW PLANAR PREDICTION MODE

Номер: US20190385002A1
Автор: Jaehyun LIM, Byeongmoon JEON, Seungwook PARK, Jaewon SUNG, Jungsun KIM, Yongjoon JEON, Joonyoung PARK, Younghee CHOI, LIM JAEHYUN, JEON BYEONGMOON, PARK SEUNGWOOK, SUNG JAEWON, KIM JUNGSUN, JEON YONGJOON, PARK JOONYOUNG, CHOI YOUNGHEE, LIM, Jaehyun, JEON, Byeongmoon, PARK, Seungwook, SUNG, Jaewon, KIM, Jungsun, JEON, Yongjoon, PARK, Joonyoung, CHOI, Younghee
Принадлежит:

New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples.

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Номер записи: 52
03-02-2022 дата публикации

METHOD AND DEVICE FOR PROCESSING IMAGE SIGNAL

Номер: US20220038734A1
Автор: Jaeho LEE, Junghak NAM, Naeri PARK, Jaehyun LIM, Hyeongmoon JANG
Принадлежит:

Embodiments of the present specification provide a method and a device for processing a video signal. A method for processing an image signal, according to an embodiment of the present specification, comprises the steps of: generating a merge candidate list including a first motion vector and a second motion vector from a spatial merge candidate or a temporal merge candidate of a current block; adding, to the merge candidate list, a third motion vector determined as the average value of the first motion vector and the second motion vector, if the number of merge candidates of the merge candidate list is smaller than the maximum number of merge candidates; and generating a prediction sample of the current block by using a motion vector indicated by a merge index in the merge candidate list. 1. A method of processing an image signal , the method comprising:generating a merge candidate list including a plurality of motion vectors derived from a spatial merge candidate or a temporal merge candidate of a current block;adding an additional motion vector determined as an average value of the motion vectors to the merge candidate list when a number of merge candidates of the merge candidate list is smaller than a maximum number of merge candidates; andgenerating a prediction sample of the current block using a motion vector indicated by a merge index on the merge candidate list.2. The method of claim 1 , wherein the adding of the additional motion vector to the merge candidate list comprises adding claim 1 , as the additional motion vector claim 1 , an average value of a first motion vector corresponding to a first index and a second motion vector corresponding to a second index to the merge candidate list.3. The method of claim 1 , wherein the generating of the merge candidate list comprises: performing searching on a motion vector for the temporal merge candidate after searching a motion vector for the spatial merge candidate.4. The method of claim 3 , wherein the ...

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Номер записи: 53
07-04-2022 дата публикации

VIDEO OR IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20220109888A1
Автор: Seethal PALURI, Jie ZHAO, Seunghwan KIM, Jaehyun LIM
Принадлежит:

According to the disclosure of the present document, an image decoding method performed by a decoding device comprises the steps of: acquiring, through a bitstream, image information including prediction mode information and residual information; deriving a prediction mode of a current block on the basis of the prediction mode information; deriving prediction samples on the basis of the prediction mode; deriving residual samples on the basis of the residual information; generating reconstruction samples on the basis of the prediction samples and the residual samples; deriving filter coefficients for an adaptive loop filter (ALF) procedure for the reconstruction samples; and generating modified reconstruction samples on the basis of the reconstruction samples and the filter coefficients, wherein the image information includes a first adaptation parameter set (APS) including an ALF data field, and the ALF data field includes ALF parameters used to derive the filter coefficients.

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Номер записи: 54
23-11-2023 дата публикации

METHODS AND APPARATUSES FOR PROCESSING VIDEO SIGNAL

Номер: US20230379501A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

Embodiments of the present invention provide video signal processing methods. A video signal encoding method according to an embodiment of the present invention comprises checking a transform block including residual samples except a prediction sample from a picture of the video signal, generating transform coefficients through a transform for the residual samples of the transform block based on a size of the transform block, and performing quantization and entropy coding the transform coefficients, wherein generating the transform coefficients includes, applying a forward primary transform to each of a horizontal direction and vertical direction of the transform block including the residual samples, and not applying a forward non-separable secondary transform to the transform block to which the primary transform has been applied when the size of the transform block is smaller than or equal to 4×4, and applying the forward non-separable secondary transform to the transform block when the ...

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Номер записи: 55
05-03-2020 дата публикации

METHOD FOR PROCESSING IMAGE ON BASIS OF INTRA-PREDICTION MODE AND APPARATUS THEREFOR

Номер: US20200077093A1
Автор: Hyeongmoon JANG, Jaehyun LIM, JANG HYEONGMOON, LIM JAEHYUN, JANG, Hyeongmoon, LIM, Jaehyun
Принадлежит:

The present invention provides an image processing method on the basis of an intra prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of an intra prediction mode may comprise the steps of: inducing a prediction mode applied to an intra prediction of a current block; determining whether a bi-directional intra prediction using reference samples located at both boundaries of the current block with respect to a prediction direction of the prediction mode is applied to the current block; and generating a prediction sample by using a reference sample neighboring the current block on the basis of the prediction mode, wherein when the bi-directional intra prediction is applied, boundary filtering for the current block is skipped. 1. A method for processing an image based on an intra-prediction mode , comprising:deriving a prediction mode applied to an intra prediction of a current block;determining whether unequal weighted prediction representing a mode of generating a prediction sample by applying different weights to a plurality of reference samples based on the prediction mode is applied to the current block; andgenerating a prediction sample by weighting two or more reference samples of reference samples neighboring the current block based on the prediction mode,wherein whether to apply filtering on the prediction sample of the current block is determined based on the application of the non-equal weighted prediction.2. The method of claim 1 , wherein the generating of the prediction sample includes:deriving a first reference sample and a second reference sample used for the unequal weighted prediction based on a prediction direction of the prediction mode when the unequal weighted prediction is applied; andgenerating the prediction sample by weighting-sum the first reference sample and the second reference sample.3. The method of claim 2 , wherein a weight applied to the first reference sample and the second reference ...

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Номер записи: 56
17-11-2016 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE INFORMATION

Номер: US20160337642A1
Автор: Seungwook PARK, Jungsun KIM, Yongjoon JEON, Joonyoung PARK, Byeongmoon JEON, Jaehyun LIM, PARK SEUNGWOOK, KIM JUNGSUN, JEON YONGJOON, PARK JOONYOUNG, JEON BYEONGMOON, LIM JAEHYUN, PARK Seungwook, KIM Jungsun, JEON Yongjoon, PARK Joonyoung, JEON Byeongmoon, LIM Jaehyun
Принадлежит:

The present invention relates to a method for encoding and decoding image information and to an apparatus using same, and the method for encoding the image information, according to the present invention, comprises the steps of: generating a recovery block; applying a deblocking filter to the recovery block; applying a sample adaptive offset (SAO) to the recovery block to which the deblocking filter is applied; and transmitting the image information including information on the SAO which is applied, wherein in the step of transmitting, information for specifying bands that cover a scope of a pixel value, to which a band off set is applied, is transmitted when the band offset is applied during the step of applying the SAO.

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Номер записи: 57
29-07-2021 дата публикации

METHOD AND DEVICE FOR DESIGNING LOW COMPLEXITY DST7

Номер: US20210235121A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

The present disclosure provides a method for reconstructing a video signal through a low-complexity Discrete Sine Transform-7 (DST7) design, including: obtaining a transform index of a current block from the video signal, wherein the transform index corresponds to any one of a plurality of transform combinations including combinations of DST7 and/or a Discrete Cosine Transform-8 (DCT8); deriving a transform combination corresponding to the transform index, wherein the transform combination includes a horizontal transform and a vertical transform, and wherein the horizontal transform and the vertical transform correspond to any one of the DST7 and the DCT8; performing an inverse transform on the current block in a vertical or horizontal direction using the DST7 or the DCT8; and reconstructing the video signal using the inverse transformed current block, wherein a 33-point Discrete Fourier Transform (DFT) is applied to the DST7 when the DST7 is 16×16 and a 65-point DFT is applied to the DST7 ...

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Номер записи: 58
19-05-2022 дата публикации

INTRA PREDICTION-BASED IMAGE CODING IN IMAGE CODING SYSTEM

Номер: US20220159239A1
Автор: Jangwon CHOI, Jin HEO, Seunghwan KIM, Jaehyun LIM, Ling LI
Принадлежит:

An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving an intra prediction type for a current block from intra prediction types; deriving a first intra prediction mode for a neighboring block to the left of the current block; deriving a second intra prediction mode for a neighboring block above the current block; constructing an intra prediction mode candidate list of the current block on the basis of the first intra prediction mode and the second intra prediction mode; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and generating prediction samples of the current block on the basis of the intra prediction type and the intra prediction mode.

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Номер записи: 59
28-12-2023 дата публикации

METHOD AND DEVICE FOR SIGNALING INFORMATION ON CHROMA FORMAT

Номер: US20230421771A1
Автор: Ling LI, Jaehyun LIM, Jin HEO, Junghak NAM
Принадлежит:

An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream including prediction information for a current block; deriving a chroma array type for the current block on the basis of a separate color plane flag indicating whether three color components are separately coded and a chroma format index indicating a chroma format sampling structure for the current block, which are included in the prediction information for the current block; deriving prediction samples for the current block on the basis of the derived chroma array type; and deriving reconstructed samples for the current block on the basis of the prediction samples.

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Номер записи: 60
22-02-2024 дата публикации

TRANSFORM IN INTRA PREDICTION-BASED IMAGE CODING

Номер: US20240064333A1
Автор: Junghak NAM, Jaehyun LIM, Moonmo KOO, Seunghwan KIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: acquiring prediction-related information and residual-related information for a current block; deriving transform coefficients for the current block on the basis of the residual-related information; and generating residual samples of the current block on the basis of the transform coefficients, wherein the residual-related information includes low-frequency non-separable transform (LFNST) index information indicating information relating to non-separable transform for a low-frequency transform coefficient of the current block on the basis of a matrix-based intra prediction (MIP) flag.

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Номер записи: 61
14-04-2022 дата публикации

METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL

Номер: US20220116605A1
Автор: Moonmo KOO, Jaehyun LIM, Seunghwan KIM
Принадлежит:

Embodiments of the present invention provide a method and device for processing a video signal. A method for processing a video signal according to an embodiment of the present specification comprises the steps of: acquiring position information of a last significant coefficient according to scanning order in a transform block; and performing residual coding on the basis of the position information of the last significant coefficient. The position information of the last significant coefficient includes a first prefix for a column position of the last significant coefficient and a second prefix for a row position of the last significant coefficient; a range of the first prefix is determined on the basis of an effective width of the transform block; a range of the second prefix is determined on the basis of an effective height of the transform block; if a width of the transform block corresponds to a first size, the effective width of the transform block is determined to be a second size ...

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Номер записи: 62
01-12-2011 дата публикации

NEW PLANAR PREDICTION MODE

Номер: US20110293001A1
Автор: Jaehyun LIM, Byeongmoon JEON, Seungwook PARK, Jaewon SUNG, Jungsun KIM, Yongjoon JEON, Joonyoung PARK, Younghee CHOI, LIM JAEHYUN, JEON BYEONGMOON, PARK SEUNGWOOK, SUNG JAEWON, KIM JUNGSUN, JEON YONGJOON, PARK JOONYOUNG, CHOI YOUNGHEE
Принадлежит: LG ELECTRONICS INC.

New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples.

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Номер записи: 63
16-05-2019 дата публикации

METHOD AND DEVICE FOR ENTROPY CODING/DECODING

Номер: US20190149826A1
Автор: Jaehyun LIM, Byeongmoon JEON, Yongjoon JEON, Seungwook PARK, Jungsun KIM, Joonyoung PARK, Hendry HENDRY, Naeri PARK, Chulkeun KIM, LIM JAEHYUN, JEON BYEONGMOON, JEON YONGJOON, PARK SEUNGWOOK, KIM JUNGSUN, PARK JOONYOUNG, HENDRY HENDRY, PARK NAERI, KIM CHULKEUN, LIM, Jaehyun, JEON, Byeongmoon, JEON, Yongjoon, PARK, Seungwook, KIM, Jungsun, PARK, Joonyoung, HENDRY, Hendry, PARK, Naeri, KIM, Chulkeun
Принадлежит:

The present invention relates to an entropy decoding method which includes: generating context related to a bin that forms a codeword of a syntax element; and performing arithmetic decoding of the bin based on the context.

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Номер записи: 64
19-08-2021 дата публикации

METHOD FOR ENCODING/DECODING VIDEO SIGNALS AND DEVICE THEREFOR

Номер: US20210258593A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

A method and a device for processing a video signal are disclosed. In particular, a method for decoding a video signal includes parsing a first syntax element indicating a primary transform kernel applied to a primary transform of a current block; determining whether a secondary transform is applicable to the current block based on the first syntax element; if the secondary transform is applicable to the current block, parsing a second syntax element indicating a secondary transform kernel applied to a secondary transform of the current block; deriving a secondary inverse-transformed block, by performing a secondary inverse-transform for a top-left specific region of the current block using a secondary transform kernel indicated by the second syntax element; and deriving a residual block of the current block, by performing a primary inverse-transform for the secondary inverse-transformed block using a primary transform kernel indicated by the first syntax element.

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Номер записи: 65
22-04-2021 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE

Номер: US20210120252A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM, KOO MOONMO, SALEHIFAR MEHDI, KIM SEUNGHWAN, LIM JAEHYUN, KOO, Moonmo, SALEHIFAR, Mehdi, KIM, Seunghwan, LIM, Jaehyun
Принадлежит:

An image decoding method according to the present disclosure includes deriving transform coefficients through dequantization based on the quantized transform coefficients for the target block; deriving modified transform coefficients based on an inverse reduced secondary transform (RST) for the transform coefficients; deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; and generating a reconstructed samples based on the residual samples, and prediction samples derived based on an intra prediction mode for the target block, wherein the inverse RST is performed based on a transform kernel matrix selected from a transform set including a plurality of transform kernel matrices, the transform set is determined based on a mapping relationship according to the intra prediction mode applied to the target block, and a plurality of intra prediction modes including the intra prediction mode of the target block are mapped to ...

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Номер записи: 66
28-09-2023 дата публикации

METHOD AND DEVICE FOR ENTROPY CODING/DECODING

Номер: US20230308656A1
Автор: Jaehyun LIM, Byeongmoon JEON, Yongjoon JEON, Seungwook PARK, Jungsun KIM, Joonyoung PARK, Hendry HENDRY, Naeri PARK, Chulkeun KIM
Принадлежит:

The present invention relates to an entropy decoding method which includes: generating context related to a bin that forms a codeword of a syntax element; and performing arithmetic decoding of the bin based on the context.

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Номер записи: 67
25-05-2023 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20230164357A1
Автор: Moonmo KOO, Hyeongmoon JANG, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: updating an intra-prediction mode of a chroma block on the basis of an intra-prediction mode of a luma block corresponding to the chroma block on the basis of the intra-prediction mode of the chroma block being a cross-component linear model (CCLM) mode; and determining a LFNST set including LFNST matrixes on the basis of the updated intra-prediction mode, wherein the updated intra-prediction mode is derived as an intra-prediction mode corresponding to a specific position in the luma block, and the updated intra-prediction mode is updated as an intra-DC mode on the basis of the intra-prediction mode, that corresponds to the specific position, being an intra-block copy (IBC) mode.

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Номер записи: 68
05-05-2022 дата публикации

METHOD FOR PARTITIONING BLOCK INCLUDING IMAGE AND DEVICE THEREFOR

Номер: US20220141498A1
Автор: Junghak NAM, Seunghwan KIM, Jaehyun LIM, Hyeongmoon JANG
Принадлежит:

Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element.

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Номер записи: 69
19-08-2021 дата публикации

APPARATUS FOR PERFORMING IMAGE CODING ON BASIS OF ATMVP CANDIDATE

Номер: US20210258604A1
Автор: Hyeongmoon JANG, Junghak NAM, Jaehyun LIM
Принадлежит:

A method for image decoding performed by a decoding apparatus according to the present disclosure comprises the steps of: deriving an ATMVP candidate for a current block; deriving merge candidates for the current block; deriving prediction samples for the current block on the basis of the merge candidates and the ATMVP candidate; and deriving reconstruction samples for the current block on the basis of the prediction samples, wherein the ATMVP candidate is a spatial neighboring block spatially adjacent to the current block.

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Номер записи: 70
18-05-2017 дата публикации

METHOD AND DEVICE FOR INTRA PREDICTION

Номер: US20170142422A1
Автор: Joonyoung PARK, Byeongmoon JEON, Yongjoon JEON, Seungwook PARK, Jungsun KIM, Jaehyun LIM, Hendry HENDRY, Naeri PARK, Chulkeun KIM, PARK JOONYOUNG, JEON BYEONGMOON, JEON YONGJOON, PARK SEUNGWOOK, KIM JUNGSUN, LIM JAEHYUN, HENDRY HENDRY, PARK NAERI, KIM CHULKEUN, PARK Joonyoung, JEON Byeongmoon, JEON Yongjoon, PARK Seungwook, KIM Jungsun, LIM Jaehyun, HENDRY Hendry, PARK Naeri, KIM Chulkeun
Принадлежит:

A method for decoding an image according to the present invention comprises the steps of: receiving and decoding MPM index information for indicating an MPM candidate which is to be used as an intra prediction mode of a current block; generating an MPM candidate list containing a plurality of MPM candidates for the current block; determining the MPM candidate indicated by the decoded MPM index information as the intra prediction mode of the current block, among the plurality of the MPM candidates which constitute the MPM candidate list; and generating a prediction block corresponding to the current block by performing intra prediction for the current block based on the determined intra prediction mode.

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Номер записи: 71
18-05-2017 дата публикации

Method and Apparatus for Signaling Image Information, and Decoding Method and Apparatus Using Same

Номер: US20170142440A1
Автор: Hendry HENDRY, Seungwook PARK, Jaehyun LIM, Yongjoon JEON, Chulkeun KIM, Jungsun KIM, Naeri PARK, Byeongmoon JEON, Joonyoung PARK, HENDRY HENDRY, PARK SEUNGWOOK, LIM JAEHYUN, JEON YONGJOON, KIM CHULKEUN, KIM JUNGSUN, PARK NAERI, JEON BYEONGMOON, PARK JOONYOUNG, HENDRY Hendry, PARK Seungwook, LIM Jaehyun, JEON Yongjoon, KIM Chulkeun, KIM Jungsun, PARK Naeri, JEON Byeongmoon, PARK Joonyoung
Принадлежит:

The present invention relates to a method for signaling image information and to a decoding method using same. The method for signaling image information according to the present invention comprises: a step of performing inter-prediction for a current picture; and a step of signaling information including the result of said inter-prediction and reference picture information indicating reference pictures usable in said inter prediction, wherein said reference picture information contains pieces of picture order count (POC) information of said usable reference pictures. The POC information of said usable reference pictures in said reference picture information is configured such that POCs for the pictures existing before said current picture in tents of a POC sequence are located at the front, and POCs for the pictures existing after said current picture in terms of a POC sequence are located following the POCs located at the front.

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Номер записи: 72
05-01-2023 дата публикации

METHOD FOR CODING IMAGE ON BASIS OF DEBLOCKING FILTERING, AND APPARATUS THEREFOR

Номер: US20230007268A1
Автор: Hyeongmoon JANG, Jaehyun LIM, Junghak NAM
Принадлежит:

A method for decoding an image, according to the present document, comprises: receiving a bitstream including BDPCM information; deriving residual samples for a current block on the basis of the BDPCM information; deriving prediction samples for the current block on the basis of the BDPCM information; generating a reconstructed picture on the basis of the residual samples and the prediction samples; and performing deblocking filtering on the reconstructed picture, wherein when BDPCM is applied to the current block, the deblocking filtering is not performed.

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Номер записи: 73
02-06-2022 дата публикации

METHOD FOR CODING IMAGE ON BASIS OF SECONDARY TRANSFORM AND DEVICE THEREFOR

Номер: US20220174319A1
Автор: Moonmo KOO, Seunghwan KIM, Mehdi SALEHIFAR, Jaehyun LIM
Принадлежит:

An image decoding method according to the present document comprises a step of deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) regarding transform coefficients regarding a target block. The inverse RST is performed on the basis of transform sets determined on the basis of a mapping relation following an intra prediction mode applied to the target block, and a transform kernel matrix selected from two transform kernel matrices included in the transform sets, respectively, and and is performed on the basis of whether or not the inverse RST is applied, and a transform index indicating one of the transform kernel matrices included in the transform sets. A syntax element bin string regarding the transform index is decoded on the basis of a different context set according to the tree type regarding the division structure of the target block. 1. An image decoding method performed by a decoding apparatus , the method comprising:receiving residual information and a transform index from a bitstream;deriving transform coefficients for a target block based on the residual information;deriving modified transform coefficients based on an inverse non-separable secondary transform for the transform coefficients, andderiving residual samples for the target block based on an inverse primary transform for the modified transform coefficients,wherein the inverse non-separable secondary transform is performed based on the transform index related to a transform kernel matrix included a transform set; deriving context information of a syntax element for the transform index,', 'decoding, based on the context information, bins of the syntax element for the transform index, the bins including a first bin and a second bin, and', 'deriving, based on the decoded bins, a value of the syntax element for the transform index,', 'wherein (i) based on a tree type of the target block being a dual tree type, the first bin of the syntax element for ...

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Номер записи: 74
12-07-2018 дата публикации

Method and Apparatus for Processing Video Data

Номер: US20180199063A1
Автор: Jungsun KIM, Seungwook PARK, Jaehyun LIM, Joonyoung PARK, Younghee CHOI, Jaewon SUNG, Byeongmoon JEON, Yongjoon JEON
Принадлежит:

A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit.

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Номер записи: 75
23-09-2021 дата публикации

METHOD FOR CODING IMAGE ON BASIS OF SECONDARY TRANSFORM AND DEVICE THEREFOR

Номер: US20210297700A1
Автор: Moonmo KOO, Seunghwan KIM, Mehdi SALEHIFAR, Jaehyun LIM
Принадлежит:

An image decoding method according to the present document comprises a step of deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) regarding transform coefficients regarding a target block. The inverse RST is performed on the basis of transform sets determined on the basis of a mapping relation following an intra prediction mode applied to the target block, and a transform kernel matrix selected from two transform kernel matrices included in the transform sets, respectively, and is performed on the basis of whether or not the inverse RST is applied, and a transform index indicating one of the transform kernel matrices included in the transform sets. A syntax element bin string regarding the transform index is decoded on the basis of a different context set according to the tree type regarding the division structure of the target block.

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Номер записи: 76
09-06-2022 дата публикации

INTRA PREDICTION-BASED IMAGE DECODING METHOD AND DEVICE THEREFOR IN IMAGE CODING SYSTEM

Номер: US20220182663A1
Автор: Jangwon CHOI, Jin HEO, Seunghwan KIM, Jaehyun LIM, Ling LI
Принадлежит:

An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving an intra prediction type for a current block from among intra prediction types; constituting an intra prediction mode candidate list of the current block on the basis of intra prediction modes of neighboring blocks of the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and generating prediction samples of the current block on the basis of the intra prediction type and the intra prediction mode.

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Номер записи: 77
04-01-2024 дата публикации

BDPCM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20240007632A1
Автор: Moonmo KOO, Jaehyun LIM, Junghak NAM, Seunghwan KIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: deriving a quantized transform coefficient for a current block on the basis of BDPCM; deriving a transform coefficient by performing dequantization on the quantized transform coefficient; and deriving a residual sample on the basis of the transform coefficient, wherein, when the BDPCM is applied to the current block, inverse non-separable transform is not applied to the transform coefficient.

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Номер записи: 78
03-02-2022 дата публикации

BDPCM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20220038698A1
Автор: Moonmo KOO, Jaehyun LIM, Junghak NAM, Seunghwan KIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: deriving a quantized transform coefficient for a current block on the basis of BDPCM; deriving a transform coefficient by performing dequantization on the quantized transform coefficient; and deriving a residual sample on the basis of the transform coefficient, wherein, when the BDPCM is applied to the current block, inverse non-separable transform is not applied to the transform coefficient. 115-. (canceled)16. An image decoding method performed by a decoding apparatus , the method comprising:deriving quantized transform coefficients for a current block based on a BDPCM (Block-based Delta Pulse Code Modulation);deriving transform coefficients by performing a dequantization on the quantized transform coefficients; andderiving residual samples based on the transform coefficients;wherein based on the BDPCM being applied to the current block, an inverse non-separable transform is not applied to the transform coefficients.17. The image decoding method of claim 16 , wherein when the BDPCM is applied to the current block claim 16 , the value of the transform index for the inverse non-separable transform that is applied to the current block is inferred to be 0.18. The image decoding method of claim 17 , wherein when the BDPCM is applied to the current block claim 17 , the value of a transform skip flag indicating whether a transform is skipped in the current block is inferred to be 0.19. The image decoding method of claim 16 , wherein the BDPCM is individually applied to a luma block of the current block or a chroma block of the current block claim 16 ,wherein when the BDPCM is applied to the luma block, the transform index for the luma block is not received, andwherein when the BDPCM is applied to the chroma block, the transform index for the chroma block is not received.20. The image decoding method of claim 16 , wherein when the width of the current block is less than or equal to a first ...

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Номер записи: 79
09-09-2021 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO

Номер: US20210281842A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

Embodiments of the present invention provide a video signal processing method and apparatus. The video signal processing method according to an embodiment of the present invention comprises checking a length of a signal to which a transform is to be applied in the video signal, wherein the length of the signal corresponds to a width or height of a current block to which the transform is applied, determining a transform type based on the length of the signal, and applying, to the signal, the transform matrix determined based on the transform type, wherein DST-4 or DCT-4 is determined as the transform type if the length of the signal corresponds to a first length, and wherein DST-7 or DCT-8 is determined as the transform type if the length of the signal corresponds to a second length different from the first length.

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Номер записи: 80
28-01-2021 дата публикации

METHOD AND DEVICE FOR DESIGNING LOW-COMPLEXITY CALCULATION DST7

Номер: US20210029357A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM, KOO MOONMO, SALEHIFAR MEHDI, KIM SEUNGHWAN, LIM JAEHYUN, KOO, Moonmo, SALEHIFAR, Mehdi, KIM, Seunghwan, LIM, Jaehyun
Принадлежит:

Reconstructing a video signal based on low-complexity DST7 design including obtaining a transform index of a current block from the video signal and deriving a transform combination corresponding to the transform index. The transform index corresponds to any one of a plurality of transform combinations including a combination of DST7 and/or DCT8, and the transform combination includes horizontal and vertical transforms that correspond to at least one of the DST7 or the DCT8. The reconstruction also includes performing an inverse transform in a vertical direction by using the DST7, performing an inverse transform in a horizontal direction by using the DCT8, and reconstructing the video signal by using the current block on which the inverse transform is performed. The DST7 includes Discrete Fourier Transform (DFT) and has a different type of DFT structure based on a size of the current block. 1. A method for reconstructing a video signal based on low-complexity DST7 design , comprising:obtaining a transform index of a current block from the video signal, wherein the transform index corresponds to any one of a plurality of transform combinations including a combination of DST7 and/or DCT8;deriving a transform combination corresponding to the transform index, wherein the transform combination includes a horizontal transform and a vertical transform, and wherein the horizontal transform and the vertical transform correspond to at least one of the DST7 or the DCT8;performing an inverse transform in a vertical direction with respect to the current block by using the DST7;performing an inverse transform in a horizontal direction with respect to the current block by using the DCT8; andreconstructing the video signal by using the current block which the inverse transform is performed,wherein the DST7 includes Discrete Fourier Transform (DFT) and has a different type of DFT structure based on a size of the current block.2. The method of claim 1 , when the current block is 16× ...

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Номер записи: 81
28-10-2021 дата публикации

VIDEO DECODING METHOD USING RESIDUAL INFORMATION IN VIDEO CODING SYSTEM, AND APPARATUS THEREOF

Номер: US20210337235A1
Автор: Jungah CHOI, Sunmi YOO, Jin HEO, Jangwon CHOI, Ling LI, Seunghwan KIM, Jaehyun LIM
Принадлежит:

A video decoding method performed by a decoding apparatus according to the present document comprises the steps of: receiving a bit stream including residual information of a current block; deriving a specific number of the number of context encoding bins for context syntax elements for a current sub-block of the current block; decoding the context syntax elements for the current sub-block included in the residual information on the basis of the specific number; deriving transform coefficients for the current sub-block on the basis of the decoded context syntax elements; deriving residual samples for the current block on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples.

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Номер записи: 82
27-07-2017 дата публикации

INTER PREDICTION METHOD AND APPARATUS THEREFOR

Номер: US20170214922A1
Автор: Yongjoon JEON, Seungwook PARK, Jaehyun LIM, Chulkeun KIM, Jungsun KIM, Naeri PARK, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK, JEON YONGJOON, PARK SEUNGWOOK, LIM JAEHYUN, KIM CHULKEUN, KIM JUNGSUN, PARK NAERI, HENDRY HENDRY, JEON BYEONGMOON, PARK JOONYOUNG, JEON Yongjoon, PARK Seungwook, LIM Jaehyun, KIM Chulkeun, KIM Jungsun, PARK Naeri, HENDRY Hendry, JEON Byeongmoon, PARK Joonyoung
Принадлежит:

According to the present invention, an inter prediction method comprises the steps of: generating a merge candidate list for a block to be predicted, wherein the block is to correspond to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted so as to generate a prediction block corresponding to the current prediction unit.

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Номер записи: 83
21-10-2021 дата публикации

INTER PREDICTION METHOD AND APPARATUS THEREFOR

Номер: US20210329260A1
Автор: Yongjoon JEON, Seungwook PARK, Jaehyun LIM, Chulkeun KIM, Jungsun KIM, Naeri PARK, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK
Принадлежит:

According to the present invention, an inter prediction method comprises the steps of: generating a merge candidate list for a block to be predicted, wherein the block is to correspond to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted so as to generate a prediction block corresponding to the current prediction unit.

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Номер записи: 84
31-12-2015 дата публикации

METHOD FOR ENCODING AND DECODING VIDEO, AND APPARATUS USING SAME

Номер: US20150382013A1
Автор: Jaehyun LIM, Jungsun KIM, Seungwook PARK, Jaewon SUNG, Byeongmoon JEON, Joonyoung PARK, Yongjoon JEON, Younghee CHOI
Принадлежит:

The present invention relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present invention comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected ...

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Номер записи: 85
03-10-2019 дата публикации

METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE INFORMATION

Номер: US20190306504A1
Автор: Seungwook PARK, Jaehyun LIM, Yongjoon JEON, Chulkeun KIM, Jungsun KIM, Naeri PARK, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK, PARK SEUNGWOOK, LIM JAEHYUN, JEON YONGJOON, KIM CHULKEUN, KIM JUNGSUN, PARK NAERI, HENDRY HENDRY, JEON BYEONGMOON, PARK JOONYOUNG, PARK, Seungwook, LIM, Jaehyun, JEON, Yongjoon, KIM, Chulkeun, KIM, Jungsun, PARK, Naeri, HENDRY, Hendry, JEON, Byeongmoon, PARK, Joonyoung
Принадлежит:

A deblocking filtering method, a boundary strength (bS) deriving method, and encoding/decoding method and apparatus using the methods are provided. The bS deriving method includes the steps of: deriving a boundary of a deblocking filtering unit block which is a unit block on which deblocking filtering is performed; and setting a bS for each bS setting unit block in the deblocking filtering unit block. Here, the step of setting the bS includes setting a bS value of a target boundary corresponding to the boundary of the deblocking filtering unit block as the bS setting unit block.

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Номер записи: 86
08-06-2023 дата публикации

FINGERPRINT SENSOR PACKAGE AND SMART CARD INCLUDING THE SAME

Номер: US20230177300A1
Автор: Gwangjin LEE, Jaehyun LIM, Hyunjong MOON
Принадлежит: Samsung Electronics Co., Ltd.

Provided is a fingerprint sensor package including a first substrate including first bonding pads and an external connection pad, a second substrate attached to the first substrate, the second substrate including a plurality of first sensing patterns spaced apart from each other in a first direction and extending in a second direction intersecting the first direction, a plurality of second sensing patterns spaced apart from each other in the second direction and extending in the first direction, second bonding pads, and test pads, conductive wires electrically connecting the first bonding pads and the second bonding pads, a controller chip connected to the second substrate, and a molding layer covering the controller chip and the second substrate and in contact with the first bonding pads, the second bonding pads, the test pads, and the conductive wires.

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Номер записи: 87
04-05-2023 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE

Номер: US20230133403A1
Автор: Moonmo KOO, Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM
Принадлежит:

An image decoding method according to the present disclosure includes deriving transform coefficients through dequantization based on the quantized transform coefficients for the target block; deriving modified transform coefficients based on an inverse reduced secondary transform (RST) for the transform coefficients; deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; and generating a reconstructed samples based on the residual samples, and prediction samples derived based on an intra prediction mode for the target block, wherein the inverse RST is performed based on a transform kernel matrix selected from a transform set including a plurality of transform kernel matrices, the transform set is determined based on a mapping relationship according to the intra prediction mode applied to the target block, and a plurality of intra prediction modes including the intra prediction mode of the target block are mapped to ...

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Номер записи: 88
26-08-2021 дата публикации

IMAGE CODING METHOD ON BASIS OF NON-SEPARABLE SECONDARY TRANSFORM AND DEVICE THEREFOR

Номер: US20210266549A1
Автор: Mehdi SALEHIFAR, Seunghwan KIM, Jaehyun LIM, Moonmo KOO
Принадлежит:

An image decoding method performed by means of a decoding device according to the present disclosure comprises the steps of: deriving transform coefficients of a target block from a bitstream; deriving a non-separable secondary transform (NSST) index with respect to the target block; performing inverse transform with respect to the transform coefficients of the target block on the basis of the NSST index and thus deriving residual samples of the target block; and generating a reconstructed picture on the basis of the residual samples.

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Номер записи: 89
09-08-2018 дата публикации

METHOD FOR STORING MOTION INFORMATION AND METHOD FOR INDUCING TEMPORAL MOTION VECTOR PREDICTOR USING SAME

Номер: US20180227594A1
Автор: Joonyoung PARK, Seungwook PARK, Jaehyun LIM, Jungsun KIM, Younghee CHOI, Jaewon SUNG, Byeongmoon JEON, Yongjoon JEON
Принадлежит:

A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit.

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Номер записи: 90
10-05-2018 дата публикации

VIDEO ENCODING AND DECODING METHOD AND APPARATUS USING SAME

Номер: US20180131939A1
Автор: Hendry HENDRY, Byeongmoon JEON, Yongjoon JEON, Seungwook PARK, Jungsun KIM, Joonyoung PARK, Jaehyun LIM, Naeri PARK, Chulkeun KIM
Принадлежит:

The present invention relates to video encoding and decoding method and apparatus, and a video encoding method according to the present invention comprises the steps of: entropy-encoding quantized transform information; and transmitting the entropy-encoded information as a bitstream, wherein the bitstream includes information indicating pieces of information to be parallel decoded in byte units.

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Номер записи: 91
17-03-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

Номер: US20220086490A1
Автор: Moonmo KOO, Jaehyun LIM, Seunghwan KIM
Принадлежит:

Embodiments of the present disclosure provide a method and apparatus for processing a video signal. A method for decoding a video signal according to an embodiment of the present disclosure includes obtaining a sub-block transform (SBT) flag indicating whether an SBT is applied, wherein the SBT represents a transform applied to one of sub-blocks split from a coding unit, determining a transform unit from the coding unit based on the SBT flag, determining a size value of the transform unit as a first reference value if DST-7 (Discrete Sine Transform type 7) or DCT-8 (Discrete Cosine Transform type 8) is applied and the size value of the transform unit is greater than the first reference value and less than a third reference value and determining the size value as a second reference value if DCT-2 (Discrete Cosine Transform type 2) is applied and the size value is equal to or greater than the third reference value, wherein the third reference value is greater than the second reference value and the second reference value is greater than the first reference value, obtaining transform coefficients based on the size value, and performing an inverse transform on the transform coefficients. A data processing time and the amount of data necessary for a transform can be reduced by performing coding in consideration of a region reduced according to a block size. 115-. (canceled)16. A method for decoding a video signal , comprising:obtaining a sub-block transform (SBT) flag indicating whether a SBT is applied, wherein the SBT represents a transform applied to a transform unit corresponding to one of subblocks split from a coding unit;checking whether a condition related to a width and a height of the transform unit is satisfied;determining a width variable and a height variable related to a transform target region based on the SBT flag and the condition; andperforming an inverse-transform on the transform target region based on the width variable and the height variable ...

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Номер записи: 92
01-12-2011 дата публикации

ENHANCED INTRA PREDICTION MODE SIGNALING

Номер: US20110292994A1
Автор: Jaehyun LIM, Jungsun KIM, Seungwook PARK, Jaewon SUNG, Byeongmoon JEON, Joonyoung PARK, Yongjoon JEON, Younghee CHOI, LIM JAEHYUN, KIM JUNGSUN, PARK SEUNGWOOK, SUNG JAEWON, JEON BYEONGMOON, PARK JOONYOUNG, JEON YONGJOON, CHOI YOUNGHEE
Принадлежит: LG ELECTRONICS INC.

A method and apparatus for signaling and receiving a video signal for processing is disclosed. Methods for determining a most probable mode for predicting a current prediction block are provided as well as new methods for grouping intra prediction modes into prediction groups. Methods for predicting a prediction block of video data as well as signaling intra prediction modes are also provided.

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Номер записи: 93
29-09-2016 дата публикации

METHOD OF PROMOTING HAIR GROWTH BY ADMINISTRATION OF BFGF

Номер: US20160279167A1
Автор: Jaehyun LIM, LIM JAEHYUN, LIM Jaehyun
Принадлежит:

Disclosed are a method of promoting hair growth or preventing hair loss in a mammal. In one aspect, the method includes administering interdermally or subcutaneously an agent containing an active ingredient comprising bFGF and a pharmaceutically acceptable substance, wherein bFGF is administered in a dose of 1 μg to 100 μg per 1 cm2 of the target area of hair growth treatment or hair loss prevention and a composition for use in the method.

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Номер записи: 94
25-04-2019 дата публикации

Method and Apparatus for Processing a Video Signal

Номер: US20190124336A1
Автор: Seungwook PARK, Joonyoung PARK, Jungsun KIM, Younghee CHOI, Yongjoon JEON, Jaewon SUNG, Byeongmoon JEON, Jaehyun LIM, PARK SEUNGWOOK, PARK JOONYOUNG, KIM JUNGSUN, CHOI YOUNGHEE, JEON YONGJOON, SUNG JAEWON, JEON BYEONGMOON, LIM JAEHYUN, PARK, Seungwook, PARK, Joonyoung, KIM, Jungsun, CHOI, Younghee, JEON, Yongjoon, SUNG, Jaewon, JEON, Byeongmoon, LIM, Jaehyun
Принадлежит:

The present invention discloses a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention uses a merging mode in which prediction information on a neighbor unit is used instead of transmitting prediction information on the present unit, so as to improve coding efficiency. In this case, the number of available candidate units for merging among the units in a predetermined position is determined, and information for the merging mode is acquired on the basis of the number of the available candidate units for merging. The unit to be merged is determined using the information for the merging mode, and prediction information on the unit to be merged is acquired. The prediction value for the present unit is acquired using the prediction information on the unit to be merged, and the present unit is restored using the acquired prediction value.

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Номер записи: 95
07-01-2021 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE INFORMATION AND DEVICE USING SAME

Номер: US20210006817A1
Автор: Seungwook PARK, Jaehyun LIM, Yongjoon JEON, Hendry HENDRY, Younghee CHOI, Jaewon SUNG, Jungsun KIM, Byeongmoon JEON, Joonyoung PARK, PARK SEUNGWOOK, LIM JAEHYUN, JEON YONGJOON, HENDRY HENDRY, CHOI YOUNGHEE, SUNG JAEWON, KIM JUNGSUN, JEON BYEONGMOON, PARK JOONYOUNG, PARK, Seungwook, LIM, Jaehyun, JEON, Yongjoon, HENDRY, Hendry, CHOI, Younghee, SUNG, Jaewon, KIM, Jungsun, JEON, Byeongmoon, PARK, Joonyoung
Принадлежит:

The present invention relates to the encoding and decoding of image information. According to the present invention, the decoding method comprises the steps of: entropy-decoding received information; performing inter prediction on a current block based on the entropy-decoded information; and restoring images by using the prediction results, wherein, in the inter prediction step, a skip mode or merge mode is applied to the current block and movement information of the current block may be determined based on the movement information of a neighboring block of the current block. 115-. (canceled)16. A decoding method for an inter prediction , the method comprising:receiving, by a decoding apparatus, inter prediction mode information, merge index information and residual information for a current block;determining, by the decoding apparatus, a merge mode is used as an inter prediction mode for the current block based on the inter prediction mode information;configuring, by the decoding apparatus, merge candidates including spatial merge candidates and a temporal merge candidate based on spatial neighboring blocks and a temporal neighboring block of the current block, wherein the temporal neighboring block is located in a collocated picture;selecting, by the decoding apparatus, a merge candidate from the configured merge candidates for the merge mode based on the merge index information;deriving, by the decoding apparatus, motion information of the current block based on motion information for the selected merge candidate, wherein the motion information of the current block includes a motion vector and a reference picture index;deriving, by the decoding apparatus, prediction samples of the current block based on the motion vector and a reference picture indicated by the reference picture index;deriving, by the decoding apparatus, residual samples based on the residual information;generating, by the decoding apparatus, a reconstructed picture based on the prediction ...

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Номер записи: 96
17-08-2023 дата публикации

IMAGE DECODING METHOD AND DEVICE USING RESIDUAL INFORMATION IN IMAGE CODING SYSTEM

Номер: US20230262220A1
Автор: Jungah CHOI, Jaehyun LIM, Jin HEO, Sunmi YOO, Ling LI, Jangwon CHOI, Seunghwan KIM
Принадлежит:

An image decoding method, which is performed by a decoding device according to the present document, is characterized by including: a step for receiving a bitstream including residual information about the current block; a step for deriving a maximum value of the number of context-encoding bins for context syntax elements coded on the basis of context included in the residual information; a step for entropy-decoding the context syntax elements on the basis of the maximum value; a step for deriving conversion coefficients for the current block on the basis of the entropy-decoded context syntax elements; a step for deriving a residual sample for the current block on the basis of the conversion coefficients; and a step for generating a reconstructed picture on the basis of the residual sample for the current block.

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Номер записи: 97
04-06-2020 дата публикации

INTRA-PREDICTION MODE-BASED IMAGE PROCESSING METHOD AND APPARATUS THEREFOR

Номер: US20200177878A1
Автор: Jangwon CHOI, Jaehyun LIM, CHOI JANGWON, LIM JAEHYUN, CHOI, Jangwon, LIM, Jaehyun
Принадлежит:

Disclosed are an intra-prediction mode-based image processing method and apparatus. In particular, the intra-prediction mode-based image processing method may comprise the steps of: generating a first prediction sample by performing spatial prediction on a current chroma block; determining whether or not a combined intra-prediction mode is applicable to the current chroma block; when the combined intra-prediction mode is applicable to the current chroma block, determining a component prediction mode used for inter-component prediction of the current chroma block; generating a second prediction sample by applying the determined component prediction mode to the current chroma block; and generating a final prediction sample of the current chroma block by using the first prediction sample and the second prediction sample.

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Номер записи: 98
03-02-2022 дата публикации

TRANSFORM IN INTRA PREDICTION-BASED IMAGE CODING

Номер: US20220038744A1
Автор: Junghak NAM, Jaehyun LIM, Moonmo KOO, Seunghwan KIM
Принадлежит:

An image decoding method according to the present document comprises the steps of: acquiring prediction-related information and residual-related information for a current block; deriving transform coefficients for the current block on the basis of the residual-related information; and generating residual samples of the current block on the basis of the transform coefficients, wherein the residual-related information includes low-frequency non-separable transform (LFNST) index information indicating information relating to non-separable transform for a low-frequency transform coefficient of the current block on the basis of a matrix-based intra prediction (MIP) flag. 1. An image decoding method performed by a decoding apparatus , the method comprising:obtaining prediction related information and residual related information for a current block from a bitstream;deriving transform coefficients for the current block based on the residual related information; andgenerating residual samples of the current block based on the transform coefficients,wherein the residual related information includes low frequency non-separable transform (LFNST) index information related to one of transform kernels in an LFNST transform set for the current block based on an enabled flag for LFNST and a matrix based intra prediction (MIP) flag,wherein generating the residual samples comprises:deriving modified transform coefficients from the transform coefficients based on the LFNST index information; andgenerating the residual samples based on the modified transform coefficients,wherein the MIP flag represents whether MIP is applied to the current block, andwherein the MIP flag is included in the prediction related information.2. The image decoding method of claim 1 , wherein the residual related information includes the LFNST index information based on the enabled flag representing that the LFNST is enabled and the MIP flag representing that the MIP is not applied.3. The image decoding method ...

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Номер записи: 99
31-12-2020 дата публикации

METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE INFORMATION

Номер: US20200413056A1
Автор: Seungwook PARK, Jaehyun LIM, Yongjoon JEON, Chulkeun KIM, Jungsun KIM, Naeri PARK, Hendry HENDRY, Byeongmoon JEON, Joonyoung PARK, PARK SEUNGWOOK, LIM JAEHYUN, JEON YONGJOON, KIM CHULKEUN, KIM JUNGSUN, PARK NAERI, HENDRY HENDRY, JEON BYEONGMOON, PARK JOONYOUNG, PARK, Seungwook, LIM, Jaehyun, JEON, Yongjoon, KIM, Chulkeun, KIM, Jungsun, PARK, Naeri, HENDRY, Hendry, JEON, Byeongmoon, PARK, Joonyoung
Принадлежит:

A deblocking filtering method, a boundary strength (bS) deriving method, and encoding/decoding method and apparatus using the methods are provided. The bS deriving method includes the steps of: deriving a boundary of a deblocking filtering unit block which is a unit block on which deblocking filtering is performed; and setting a bS for each bS setting unit block in the deblocking filtering unit block. Here, the step of setting the bS includes setting a bS value of a target boundary corresponding to the boundary of the deblocking filtering unit block as the bS setting unit block.

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Номер записи: 100
24-01-2013 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

Номер: US20130022127A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value. 1. A video signal processing method comprising:selecting at least one neighboring partition motion vector for motion vector prediction of the current partition;scaling the selected neighboring partition motion vector when a reference picture of the neighboring partition motion vector is different from a reference picture of the current partition;acquiring a motion vector prediction value of the current partition using the scaled motion vector; andacquiring a motion vector of the current partition using the motion vector prediction value.2. The video signal processing method according to claim 1 , wherein the scaled motion vector is a motion vector linearly interpolated using an inter picture temporal distance.3. A video signal processing method comprising:selecting a neighboring partition motion vector to be include in a motion vector prediction candidate group of the current partition;scaling the selected neighboring partition motion vector when a reference picture of the neighboring partition motion vector is ...

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Номер записи: 101
28-02-2013 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20130051469A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

The present invention relates to a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention determines the type of a block in accordance with the information which indicates whether to partition or merge the current block, acquires predicted values of each sub-block using restored peripheral pixels for each sub-block, and restores the current block using the acquired values. Here, pixels used for acquiring predicted values may include restored pixels for other sub-blocks contained in the current block, and the type of sub-blocks can be taken into account in a prediction mode for acquiring predicted values. 14-. (canceled)5. A method of decoding a video signal , the method comprising:receiving the video signal, the video signal including a plurality of prediction blocks, each prediction block including a luma block and a chroma block;obtaining intra prediction mode information of the luma block for a current prediction block from the video signal;reconstructing a luma sample of the luma block based on the intra prediction mode information, the reconstructing including obtaining a predicted luma sample of a luma sub-block based on the intra prediction mode information and a reconstructed luma sample of other luma sub-blocks included in the luma block, the luma sub-block being a block resulting from a partitioning of the luma block and reconstructing the luma sample of the luma sub-block using the predicted luma sample of the luma sub-block;obtaining chroma prediction mode information from the video signal, the chroma prediction mode information indicating a chroma sample of the chroma block is predicted using the reconstructed luma sample of the luma block; andobtaining a predicted chroma sample of the chroma block for the current prediction block using the reconstructed luma sample of the luma block.6. The method of claim 5 , the obtaining the predicted chroma sample of the chroma block ...

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Номер записи: 102
02-05-2013 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20130107959A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

The present invention discloses a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention uses a merging mode in which prediction information on a neighbor unit is used instead of transmitting prediction information on the present unit, so as to improve coding efficiency. In this case, the number of available candidate units for merging among the units in a predetermined position is determined, and information for the merging mode is acquired on the basis of the number of the available candidate units for merging. The unit to be merged is determined using the information for the merging mode, and prediction information on the unit to be merged is acquired. The prediction value for the present unit is acquired using the prediction information on the unit to be merged, and the present unit is restored using the acquired prediction value. 17-. (canceled)8. A method of decoding a video signal with a decoding apparatus , comprising:receiving the video signal, the video signal including a prediction block, the prediction block being a block resulting from a partitioning of a 2N×2N coding block;obtaining merge flag information of the prediction block from the video signal, the merge flag information indicating whether or not prediction information of the prediction block is derived from prediction information of a neighboring block adjacent to the prediction block, the prediction information including a motion vector and a reference index;constructing a merge candidate list for the prediction block, the merge candidate list being composed of a plurality of merge candidates, the plurality of merge candidates including a left neighboring block, a top neighboring block and corner neighboring blocks,wherein the constructing comprises:exempting the left neighboring block from the merge candidate list, the exempting being performed when a size of the prediction block is N×2N according to the ...

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Номер записи: 103
20-06-2013 дата публикации

Method for encoding and decoding video, and apparatus using same

Номер: US20130156335A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Jaewon Sung, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon, Younghee CHOI
Принадлежит: LG ELECTRONICS INC

The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to use the same candidates. The method for decoding video data proposed by the present invention comprises receiving mode information on an inter-prediction method of a current block, determining, on the basis of the received mode information, whether the inter-prediction method to be applied to the current block is an AMVP mode or a merge mode, and selecting a candidate to derive motion information of the current block.

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Номер записи: 104
27-06-2013 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20130163669A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

The present invention relates to a method and apparatus for encoding or decoding a video signal. According to the present invention, a plurality of reference units for image prediction of the current unit is acquired and combined to obtain a unit prediction value, thereby improving the accuracy of image prediction. More particularly, the present invention relates to a method for inducing a variety of reference units using a motion vector prediction value or a motion vector which is used in conventional inter-prediction, and also relates to a method which combines the reference units so as to obtain the prediction value for the current unit. In addition, the present invention relates to a method which involves acquiring a plurality of reference units for a merging mode, and combining the reference units so as to perform image prediction. 1. A method of decoding video data in a coded video data bitstream with a decoding apparatus , the method comprising:obtaining, with the decoding apparatus, merge indication information from the coded video data bitstream, the merge indication information indicating whether inter prediction information of a current block is derived from inter prediction information of a neighboring block adjacent to the current block;constructing, with the decoding apparatus, a merging candidate list based on the merge indication information, the merging candidate list including a plurality of merging candidates, the merging candidates including inter prediction information of neighboring blocks; wherein the deriving the supplementary merging candidate comprises:', 'extracting, with the decoding apparatus, inter prediction information for first-direction prediction from one of the neighboring blocks;', 'extracting, with the decoding apparatus, inter prediction information for second-direction prediction from another of the neighboring blocks; and', 'combining, with the decoding apparatus, the extracted inter prediction information for first-direction ...

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Номер записи: 105
11-07-2013 дата публикации

METHOD FOR PARTITIONING BLOCK AND DECODING DEVICE

Номер: US20130177079A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency. 1. A method of decoding , the method comprising:partitioning a prediction unit, on which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; andperforming the intra prediction with respect to each of the plurality of transform units based on the predetermined intra prediction mode.2. The method of claim 1 , wherein the partitioning the prediction unit claim 1 , on which the intra prediction is performed in the predetermined intra prediction mode claim 1 , into the plurality of transform units claim 1 , comprises:partitioning such that a size of the plurality of transform units is a N×N size when a size of the prediction unit is a size of 2N×2N.3. The method of claim 1 , wherein the performing the intra prediction with respect to each of the plurality of transform units based on the predetermined intra prediction mode comprises:predicting and reconstructing a first transform unit based on the predetermined intra prediction mode;predicting and reconstructing a second transform unit based on a result of reconstructing the first transform unit and the predetermined intra prediction mode;predicting and reconstructing a third transform unit based on a result of reconstructing the first transform unit and the second transform unit and the predetermined intra prediction mode; andpredicting and reconstructing a fourth transform unit based on a result of reconstructing the first transform unit, the second transform unit, and the third ...

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Номер записи: 106
19-09-2013 дата публикации

METHOD FOR TRANSFORMING FRAME FORMAT AND APPARATUS USING SAME METHOD

Номер: US20130242049A1
Автор: Choi Younghee, Jeon Byeong Moon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

Disclosed are a method for converting a frame format and an apparatus using the same. The method may include: decoding an encoded multiview video compression (MVC)-compatible frame using an MVC decoder; and converting the decoded MVC-compatible frame into an advanced 3D frame. Accordingly, a different frame format may be played by an existing image processing device. 1. A video decoding method comprising:decoding an encoded multiview video compression (MVC)-compatible frame using an MVC decoder; andconverting the decoded MVC-compatible frame into an advanced 3D frame.2. The video decoding method of claim 1 , further comprising performing view synthesis using the advanced 3D frame.3. The video decoding method of claim 1 , wherein the MVC-compatible frame comprises a frame which is generated based on color information and depth information of the advanced 3D frame through a frame compatible method.4. The video decoding method of claim 3 , wherein the frame compatible method comprises any one of a check board method claim 3 , a column interleaving method claim 3 , a row interleaving method claim 3 , a side-by-side method claim 3 , and a top and bottom method.5. The video decoding method of claim 1 , wherein the advanced 3D frame comprises multiview video plus depth (MVD) data containing color information and depth information or layered depth video (LDV) data containing foreground and background textures and foreground and background depths.6. The video decoding method of claim 1 , wherein claim 1 , in the converting of the decoded MVC-compatible frame into the advanced 3D frame claim 1 ,when the advanced 3D frame is MVD data, color information is extracted and up-sampled based on first information contained in the MVC-compatible frame, and depth information is extracted and up-sampled based on second information contained in the MVC-compatible frame.7. The video decoding method of claim 1 , wherein claim 1 , in the converting of the decoded MVC-compatible frame into ...

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Номер записи: 107
17-10-2013 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE INFORMATION AND DEVICE USING SAME

Номер: US20130272404A1
Автор: Choi Younghee, Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC

The present invention relates to the encoding and decoding of image information. According to the present invention, the decoding method comprises the steps of: entropy-decoding received information; performing inter prediction on a current block based on the entropy-decoded information; and restoring images by using the prediction results, wherein, in the inter prediction step, a skip mode or merge mode is applied to the current block and movement information of the current block may be determined based on the movement information of a neighboring block of the current block. 1. A method of coding video information , comprising:performing inter-prediction on a current block;performing entropy coding on information on the inter-prediction; andsignaling the entropy-coded information,wherein in the performing of the inter-prediction, skip mode or merge mode is applied to the current block and a reference index of the current block is determined based on reference indices of blocks neighboring the current block.2. The method of claim 1 , wherein in the signaling of the entropy-coded information claim 1 , motion information on the current block is directly transmitted.3. The method of claim 2 , wherein the transmitted motion information comprises the reference index of the current block.4. The method of claim 2 , wherein the motion information is transmitted in any one of a slice unit claim 2 , a picture unit claim 2 , a target prediction block unit claim 2 , and a coding unit.5. The method of claim 1 , wherein:in the performing of the inter-prediction, any one of pieces of motion information on the neighbor blocks of the current block is determined as motion information on the current block, andin the signaling of the entropy-coded information, the motion information of the current block indicates whether the motion information of the current block is any one of the pieces of motion information on the neighbor blocks.6. The method of claim 1 , wherein in the performing ...

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Номер записи: 108
07-11-2013 дата публикации

Semiconductor Device and Method of Forming a Shielding Layer over a Semiconductor Die Disposed in a Cavity of an Interconnect Structure and Grounded Through the Die TSV

Номер: US20130292804A1
Автор: Kim JinGwan, Lee KyuWon, Lee SinJae, Lim Jaehyun, Oh JiHoon
Принадлежит:

A semiconductor device has an interconnect structure with a cavity formed partially through the interconnect structure. A first semiconductor die is mounted in the cavity. A first TSV is formed through the first semiconductor die. An adhesive layer is deposited over the interconnect structure and first semiconductor die. A shielding layer is mounted over the first semiconductor die. The shielding layer is secured to the first semiconductor die with the adhesive layer and grounded through the first TSV and interconnect structure to block electromagnetic interference. A second semiconductor die is mounted to the shielding layer and electrically connected to the interconnect structure. A second TSV is formed through the second semiconductor die. An encapsulant is deposited over the shielding layer, second semiconductor die, and interconnect structure. A slot is formed through the shielding layer for the encapsulant to flow into the cavity and cover the first semiconductor die. 1. A semiconductor device , comprising:a substrate including a cavity;a first semiconductor die or component disposed in the cavity of the substrate;a first conductive via formed through the first semiconductor die or component;a shielding layer disposed over the first semiconductor die or component and electrically connected to the first conductive via; andan encapsulant deposited over the shielding layer and substrate and further through an opening in the shielding layer over the semiconductor die or component.2. The semiconductor device of claim 1 , wherein the opening in the shielding layer includes a slot extending along a length of the shielding layer to dispense the encapsulant into the cavity over the first semiconductor die or component.3. The semiconductor device of claim 1 , wherein the shielding layer is planar with the substrate.4. The semiconductor device of claim 1 , further including a second semiconductor die or component disposed over the shielding layer.5. The semiconductor ...

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Номер записи: 109
21-11-2013 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE AND DEVICE USING SAME

Номер: US20130308704A1
Автор: Choi Younghee, CHUNG Taeil, Jeon Byeongmoon, Jeon Yongjoon, Kim Jingyeong, Kim Jungsun, KIM SangChul, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

The method for deriving a temporal motion vector predictor according to the present invention comprises the steps of: selecting a reference picture for a current block; deciding a predictor block corresponding to a predetermined storage unit block, as a reference prediction unit for the current block, in the reference picture; and deriving the temporal motion vector predictor from motion information of the decided reference prediction unit. The present invention enhances image compression efficiency. 1. A method for deriving a temporal motion vector predictor , comprising:selecting a reference picture for a current block;determining a prediction block that corresponds to a predetermined storage unit block in the reference picture as a reference prediction unit (colPu) for the current block; andderiving a temporal motion vector predictor (TMVP) from motion information of the determined reference prediction unit,wherein the motion information of the reference prediction unit is motion information located in a representative pixel that the reference prediction unit covers, andthe representative pixel is a pixel in which representative motion information, which is stored to represent the motion information in the predetermined storage unit block, is located.2. The method for deriving a temporal motion vector predictor of claim 1 , wherein the predetermined storage unit block is a bottom right corner block that is located at a bottom right corner of a co-located block claim 1 , andthe co-located block is a block that is in the same position as the current block in the reference picture.3. The method for deriving a temporal motion vector predictor of claim 2 , wherein if the prediction block that corresponds to the bottom right corner block in the reference picture is coded in an intra mode or is unavailable claim 2 ,the predetermined storage unit block is a bottom right center block that is located in a bottom right center of the co-located block.4. The method for ...

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Номер записи: 110
28-11-2013 дата публикации

Method for Storing Motion Information and Method for Inducing Temporal Motion Vector Predictor Using Same

Номер: US20130315571A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит: LG ELECTRONICS INC.

A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit. 1. A motion information storing method comprising the steps of:determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture; andstoring motion information of the representative block as motion information of the motion data storage unit,wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit.2. The motion information storing method according to claim 1 , wherein the motion information of the representative block includes a motion vector and a reference index claim 1 , and the motion vector and the reference index of the representative block are used as motion vectors and reference indices of the blocks included in the motion data storage unit.3. The motion information storing method according to claim 2 , wherein it is indicated that the blocks encoded in an intra prediction mode out of the blocks included in the motion data storage unit are intra blocks.4. The motion information storing method according to claim 3 , wherein a reference index indicating that a block is an intra block claim 3 , instead of the reference index of the representative block claim 3 , is assigned to the blocks encoded in an intra prediction mode out of the blocks included in the motion data storage unit.5. The motion information storing method according to claim 3 , wherein it ...

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Номер записи: 111
12-12-2013 дата публикации

Intra-prediction method using filtering, and apparatus using the method

Номер: US20130329794A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Jaewon Sung, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon, Younghee CHOI
Принадлежит: LG ELECTRONICS INC

Disclosed are an intra-prediction method using filtering and an apparatus using the method. An image-decoding method comprises: a step of filtering an n upper reference pixel of a block to be predicted and neighboring pixels of the n upper reference pixel so as to obtain the filtered n upper reference pixel; and a step of filtering an n left reference pixel of a block to be predicted and neighboring pixels of the n left reference pixel so as to obtain the filtered n left reference pixel. According to the present invention, intra-prediction may be efficiently performed to improve image-encoding/decoding efficiency.

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Номер записи: 112
20-02-2014 дата публикации

METHOD FOR MANAGING A REFERENCE PICTURE LIST, AND APPARATUS USING SAME

Номер: US20140050270A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook
Принадлежит: LG ELECTRONICS INC.

Provided are a method for managing a reference picture list, and an apparatus using same. An image decoding method comprises the steps of decoding one picture of second-highest temporal layer pictures in a hierarchical picture configuration; and decoding top temporal layer pictures which precede and follow the second-highest temporal layer pictures with respect to a picture order count (POC) in a POC sequence, respectively. Therefore, available reference pictures remain in a decoded picture buffer (DPB), thereby improving image-encoding efficiency. 1. A video decoding method comprising the steps of:decoding one picture out of second highest temporal layer pictures in a hierarchical picture structure; anddecoding a highest temporal layer picture present previously or subsequently in the order of picture order counts (POC) on the basis of the POC of the second highest temporal layer pictures.2. The video decoding method according to claim 1 , further comprising the step:determining whether the number of pictures calculated on the basis of short-term reference pictures and long-term reference pictures stored in a DPB so as to include the decoded second highest temporal layer pictures is equal to Max(max_num_ref_frame, 1) and whether the number of short-term reference pictures is larger than 0.3. The video decoding method according to claim 2 , further comprising the step ofcalculating the number of short-term reference pictures and the number of long-term reference pictures.4. The video decoding method according to claim 2 , further comprising the step ofremoving the short-term reference picture having the smallest POC out of the short-term reference pictures present in the DPB from the DPB when the number of pictures stored in the DPB is equal to Max(max_num_ref_frame, 1) and the number of short-term reference pictures is larger than 0.5. The video decoding method according to claim 1 , wherein the hierarchical picture structure is a GOP hierarchical picture structure ...

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Номер записи: 113
27-02-2014 дата публикации

INTRA-PREDICTION METHOD, AND ENCODER AND DECODER USING SAME

Номер: US20140056352A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook
Принадлежит: LG ELECTRONICS INC.

The present invention relates to an intra-prediction method and to an encoder and decoder using same. The intra-prediction method according to one embodiment of the present invention comprises the steps of: deriving a prediction mode of a current block; and generating a prediction block with respect to the current block on the basis of the prediction mode of the current block. When the prediction mode of the current block is an intra-angular prediction mode, values of boundary samples from among left boundary samples and upper boundary samples of the prediction block, which are not positioned in a prediction direction of the intra-angular prediction mode, are derived on the basis of reference samples positioned in the prediction direction of the intra-angular prediction mode, and on the basis of adjacent reference samples. 1. An intra prediction method comprising the steps of:deriving a prediction mode of a current block; andconstructing a predicted block of the current block on the basis of the prediction mode,wherein the prediction mode is an Intra directional prediction mode (Intra_Angular prediction mode), andwherein in the step of constructing the predicted block, a value of a boundary sample not located in the prediction direction of the Intra directional prediction mode (Intra_Angular prediction mode) out of a left boundary sample and a top boundary sample of the predicted block is derived on the basis of a reference sample located in the prediction direction and a reference sample adjacent to the boundary sample.2. The intra prediction method according to claim 1 , wherein the Intra directional prediction mode (Intra_Angular prediction mode) is a vertical prediction mode claim 1 , andwherein in the step of constructing the predicted block, a value of the left boundary sample is derived on the basis of a top reference sample of the left boundary sample and a reference sample adjacent to the left boundary sample.3. The intra prediction method according to ...

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Номер записи: 114
03-01-2019 дата публикации

METHOD FOR ENCODING AND DECODING VIDEO, AND APPARATUS USING SAME

Номер: US20190007697A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The present invention relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present invention comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected candidate. 110-. (canceled)11. A method of decoding video information , by a decoding apparatus , the method comprising:receiving inter prediction mode information and index information for a current block;determining a merge mode is applied for the current block based on the inter prediction mode information;deriving merge candidates for the merge mode from neighboring blocks of the current block;selecting one of the merge candidates to derive motion information of the current block based on the index information; andderiving the motion information of the current block based on the selected merge candidate,wherein the neighboring blocks for the merge candidates include a first neighboring block located in a left side of the current block, a second neighboring block located in an upper side of the current block, and corner neighboring blocks of the current block, andwherein the neighboring blocks for the merge candidates include a temporal neighboring block which is located in a ...

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Номер записи: 115
02-01-2020 дата публикации

INTRA PREDICTION MODE-BASED IMAGE PROCESSING METHOD, AND APPARATUS THEREFOR

Номер: US20200007891A1
Автор: KANG Je-Won, KANG Min-Joo, Lee Jaeho, Lim Jaehyun, RYU Soo Kyung, YOO Sunmi
Принадлежит:

Disclosed is a method for encoding/decoding a still image or moving image based on an intra-prediction mode and an apparatus supporting the same. Particularly, a method for processing an image based on an intra prediction mode may include determining an intra prediction mode set used for an intra prediction in a current prediction processing unit among multiple intra prediction mode sets having different resolutions with each other, wherein the resolution represents a degree of distribution of the intra prediction mode in the intra prediction mode set; deriving an intra prediction mode applied to the current prediction processing unit in the determined intra prediction mode set using index information received from an encoder; and generating a prediction sample of the current prediction processing unit based on the derived intra prediction mode, and each of the intra prediction mode sets includes one or more intra prediction modes. 1. A method for processing an image based on an intra prediction mode , comprising:determining an intra prediction mode set used for an intra prediction in a current prediction processing unit among multiple intra prediction mode sets having different resolutions with each other, wherein the resolution represents a degree of distribution of the intra prediction mode in the intra prediction mode set;deriving an intra prediction mode applied to the current prediction processing unit in the determined intra prediction mode set using index information received from an encoder; andgenerating a prediction sample of the current prediction processing unit based on the derived intra prediction mode,wherein each of the intra prediction mode sets includes one or more intra prediction modes.2. The method of claim 1 , wherein the step of determining the intra prediction mode set includes determining the intra prediction mode set using any one of a neighboring sample to a current block claim 1 , a residual signal of the current block and a transform ...

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Номер записи: 116
14-01-2021 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL BY APPLYING SECONDARY TRANSFORM TO PARTITIONED BLOCK

Номер: US20210014493A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

The present disclosure provides a method for reconstructing a video signal, which includes: obtaining a transform coefficient block by performing an entropy decoding and a dequantization for a current block; deriving a secondary transform corresponding to a specific area in the transform coefficient block, wherein the specific area represents an area including a top-left block of the transform coefficient block; performing an inverse secondary transform for each of subblocks within the specific area using the secondary transform; performing an inverse primary transform for a block which the inverse secondary transform is applied to; and reconstructing the current block using a block which the primary inverse transform is applied to. 1. A method for reconstructing a video signal , the method comprising:obtaining a transform coefficient block by performing an entropy decoding and a dequantization for a current block;deriving a secondary transform corresponding to a specific area in the transform coefficient block, wherein the specific area represents an area including a top-left block of the transform coefficient block;performing an inverse secondary transform for each of subblocks within the specific area using the secondary transform;performing an inverse primary transform for a block which the inverse secondary transform is applied to; andreconstructing the current block using a block which the primary inverse transform is applied to.2. The method of claim 1 , wherein the specific area is divided into 4×4 subblocks claim 1 , andwherein the inverse secondary transform is performed for each of the 4×4 subblocks.3. The method of claim 2 , wherein the same 4×4 secondary transform is applied or different 4×4 secondary transforms are applied to the 4×4 subblocks based on at least one of locations or prediction modes of the subblocks.4. The method of claim 2 , wherein whether the specific area is divided into 4×4 subblocks is determined based on a size of the transform ...

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Номер записи: 117
19-01-2017 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

Номер: US20170019681A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value. 112-. (canceled)13. A method for decoding a bitstream for a video signal , the method comprising:deriving at least one motion vector candidate from at least one neighboring block of the current block;constructing a motion vector candidate group of the current block, the motion vector candidate group comprising a plurality of motion vector candidates including the derived at least one motion vector candidate;obtaining a motion vector predictor of the current block from the constructed motion vector candidate group; anddecoding the current block based on the motion vector predictor,wherein the deriving the at least one motion vector candidate includes:selecting a motion vector of the at least one neighboring block as the at least one motion vector candidate when a first reference picture list is used for the current block, a second reference picture list different from the first reference picture list is used for the at least one neighboring block, and a reference picture of the current block in the first reference ...

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Номер записи: 118
03-02-2022 дата публикации

METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE INFORMATION

Номер: US20220038694A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

The present invention relates to a deblocking filtering method, a method for inducing bs (boundary strength) therefor, and a method and an apparatus for encoding/decoding using the same. The method for inducing the bS of the present invention comprises the steps of: inducing a boundary of a deblocking filtering unit block as a unit block for applying the deblocking filtering; and setting the bS according to each bS setting unit block within the deblocking filtering unit block, wherein the bS setting step can set a bS value for a target boundary corresponding to a boundary of the deblocking filtering unit block as the bs setting unit block. 1. (canceled)2. A deblocking filtering method , performed by an encoding apparatus , the method comprising:deriving a boundary of a deblocking filtering unit block in a reconstructed picture, wherein the deblocking filtering unit block is a unit block on which deblocking filtering is performed;setting a boundary strength (bS) of a target boundary in the boundary of the deblocking filtering unit block; andapplying deblocking filtering on the boundary of the deblocking filtering unit block using two bSs for the target boundarys in the boundary of the deblocking filtering unit block,wherein the applying deblocking filtering includes:determining, based on predetermined sample row or sample column accrossing the target boundary, whether the deblocking filtering is to be applied when the bS value set for the target boundary is larger than 0;determining whether strong filtering or weak filtering is applied when it is determined that the deblocking filtering is to be applied; andfiltering samples neighboring the boundary of the deblocking filtering unit block based on the determined strong filtering or weak filtering,wherein the deblocking filtering unit block corresponds to a transform block, a prediction block or an 8×8 pixel block,wherein a length of the target boundary to which the bS is set is 4 pixel, andwherein the deblocking ...

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Номер записи: 119
03-02-2022 дата публикации

Transform for matrix-based intra-prediction in image coding

Номер: US20220038741A1
Автор: Jaehyun LIM, Junghak NAM, Moonmo KOO, Seunghwan Kim
Принадлежит: LG ELECTRONICS INC

An image coding method according to the present document comprises the steps of: deriving transform coefficients for a current block on the basis of residual-related information; and generating residual samples of the current block on the basis of the transform coefficients. The residual-related information comprises low frequency non-separable transform (LFNST) index information, showing information relating to non-separable transform for low-frequency transform coefficients of the current block, on the basis of a matrix-based intra-prediction (MIP) flag showing whether or not MIP is applied to the current block. The residual samples are generated from the transform coefficients on the basis of the LFNST index information.

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Номер записи: 120
16-01-2020 дата публикации

IMAGE DECODING METHOD AND APPARATUS RELYING ON INTRA PREDICTION IN IMAGE CODING SYSTEM

Номер: US20200021800A1
Автор: CHOI Jangwon, CHOI Jungah, HEO Jin, KIM Seunghwan, Li Ling, Lim Jaehyun, YOO Sunmi
Принадлежит:

According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60. 1. A video decoding method performed by a video decoding device , the method comprising:parsing remaining intra prediction mode information for a current block;deriving neighboring samples of the current block;deriving most probable mode (MPM) list including MPM candidates of the current block;deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates;deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples; andderiving a reconstructed picture based on the prediction sample,wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, andwherein a binarization parameter for the TB binarization process is 60.2. The image decoding method of claim 1 , wherein an MPM flag of the current block is obtained claim 1 , andwherein the MPM flag indicates whether the intra prediction mode of the current block is derived from the MPM ...

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Номер записи: 121
16-01-2020 дата публикации

IMAGE DECODING METHOD AND APPARATUS USING VIDEO INFORMATION INCLUDING INTRA PREDICTION INFORMATION IN IMAGE CODING SYSTEM

Номер: US20200021806A1
Автор: CHOI Jangwon, CHOI Jungah, HEO Jin, KIM Seunghwan, Li Ling, Lim Jaehyun, YOO Sunmi
Принадлежит:

Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving MPM (Most Probable Mode) list including MPM candidates of the current block; when a value of a MPM flag is 0, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, in which the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the MPM flag, the intra prediction information includes the remaining intra prediction mode information when the value of the MPM flag is 0, the MPM flag is coded through a fixed length (FL) binarization process, a binarization parameter for the FL binarization process is 1, the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and a binarization parameter for the TB binarization process is 60. 1. A video decoding method performed by a video decoding apparatus , the method comprising:obtaining intra prediction information of the current block through a bitstream;deriving MPM (Most Probable Mode) list including MPM candidates of the current block;when a value of a MPM flag is 0, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates;deriving a prediction sample of the current block based on the intra prediction mode; andderiving a reconstructed picture based on the prediction sample,wherein the intra prediction information includes the MPM flag,wherein the intra prediction information includes the remaining intra prediction mode information when the ...

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Номер записи: 122
16-01-2020 дата публикации

IMAGE DECODING METHOD AND APPARATUS USING INTRA PREDICTION INFORMATION IN IMAGE CODING SYSTEM

Номер: US20200021807A1
Автор: KIM Seunghwan, Li Ling, Lim Jaehyun
Принадлежит:

Provided is a decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving an intra prediction mode of the current block based on remaining intra prediction mode information; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the remaining intra prediction mode information, and the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process. 1. A video decoding method performed by a decoding apparatus , the method comprising:obtaining intra prediction information of the current block through a bitstream;deriving an intra prediction mode of the current block based on remaining intra prediction mode information;deriving a prediction sample of the current block based on the intra prediction mode; andderiving a reconstructed picture based on the prediction sample,wherein the intra prediction information includes the remaining intra prediction mode information, andwherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process.2. The video decoding method of claim 1 , wherein when a value of the remaining intra prediction mode information is smaller than a specific value claim 1 , the remaining intra prediction mode information is binarized to a binary value of k bits claim 1 , andwherein when the value of the remaining intra prediction mode information is larger than or equal to the specific value, the remaining intra prediction mode information is binarized to a binary value of k+1 bits.3. The video decoding method of claim 2 , wherein the specific value and the k are derived based on a binarization parameter for the TB binarization process.4. The video decoding method of claim 3 , wherein the specific value and the k are ...

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Номер записи: 123
21-01-2021 дата публикации

METHOD AND APPARATUS FOR PERFORMING LOW-COMPLEXITY OPERATION OF TRANSFORM KERNEL FOR VIDEO COMPRESSION

Номер: US20210021871A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

The present disclosure provides a method for reconstructing a video signal based on low-complexity transform implementation including obtaining a transform index of a current block from the video signal, wherein the transform index corresponds to any one of a plurality of transform combinations including a combination of DST4 and/or DCT4; deriving a transform combination corresponding to the transform index, wherein the transform combination includes a horizontal transform and a vertical transform, and wherein the horizontal transform and the vertical transform correspond to at least one of the DST4 or the DCT4; performing an inverse transform in a vertical direction with respect to the current block by using the DST4; performing an inverse transform in a horizontal direction with respect to the current block by using the DCT4; and reconstructing the video signal by using the current block which the inverse transform is performed. 1. A method for reconstructing a video signal based on low-complexity transform execution , comprising:obtaining a transform index of a current block from the video signal, wherein the transform index corresponds to any one of a plurality of transform combinations including a combination of DST4 and/or DCT4;deriving a transform combination corresponding to the transform index, wherein the transform combination includes a horizontal transform and a vertical transform, and wherein the horizontal transform and the vertical transform correspond to at least one of the DST4 or the DCT4;performing an inverse transform in a vertical direction with respect to the current block by using the DST4;performing an inverse transform in a horizontal direction with respect to the current block by using the DCT4; andreconstructing the video signal by using the current block which the inverse transform is performed.2. The method of claim 1 , wherein the DST4 and/or the DCT4 are/is executed by using a forward DCT2 or an inverse DCT2.4. The method of claim 1 , ...

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Номер записи: 124
26-01-2017 дата публикации

HYBRID CHIP COMPRISING HYBRID CONNECTOR

Номер: US20170026041A1
Автор: CHO Thomas Byunghak, CHOI Jongwon, HAN SANGWOOK, Lee Joonhee, LEE Sung-Jun, Lim Jaehyun
Принадлежит:

An integrated circuit (IC), a method of testing the IC, and a method of manufacturing the IC are provided. The IC includes analog circuitry, digital circuitry, at least one first connector, and a switching unit operatively coupled with the at least one first connector and configured to, if a first signal is received, couple the analog circuitry and the at least one first connector, and, if a second signal is received, couple the digital circuitry and the at least one first connector. 1. An integrated circuit (IC) , comprising:analog circuitry;digital circuitry;at least one first connector; anda switching unit operatively coupled with the at least one first connector and configured to:if a first signal is received, couple the analog circuitry and the at least one first connector, andif a second signal is received, couple the digital circuitry and the at least one first connector.2. The IC of claim 1 , further comprising:at least one second connector operatively coupled with the analog circuitry; andat least one third connector operatively coupled with the digital circuitry.3. The IC of claim 2 , wherein the analog circuitry is configured to receive at least one first analog signal and at least one second analog signal claim 2 , whereinif the switching unit receives the first signal, the at least one first analog signal is received from at least one electronic device through the at least one first connector, andthe at least one second analog signal is received from the at least one electronic device through the at least one second connector.4. The IC of claim 3 , wherein the digital circuitry is configured to receive at least one first digital signal and at least one second digital signal claim 3 , whereinif the switching unit receives the second signal, the at least one first digital signal is received from at least one electronic device through the at least one first connector, andthe at least one second digital signal is received from the at least one electronic ...

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Номер записи: 125
10-02-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20220046246A1
Автор: CHOI Jungah, KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

An image decoding method according to the present document comprises a step for deriving a residual sample, wherein the step for deriving the residual sample comprises the steps of: deriving a zero out block for a current block; deriving a context model for last significant coefficient location information on the basis of the width or height of the current block; deriving a value of a last significant coefficient location on the basis of the context model; and deriving the last significant coefficient location on the basis of a value of the last significant coefficient location information and the width or height of the zero out block. 1. An image decoding method performed by a decoding apparatus , the method comprising:receiving a bitstream comprising residual information;deriving transform coefficients for a current block based on the residual information;deriving residual samples for the current block based on the transform coefficients; andgenerating a reconstructed picture based on the residual samples,wherein the residual information comprises last significant coefficient position information, andwherein the deriving of the residual samples comprises:deriving a zero-out block for the current block;deriving a context model for the last significant coefficient position information based on a width or a height of the current block;deriving a value of the last significant coefficient position information based on the context model; andderiving a last significant coefficient position based on the value of the last significant coefficient position information and a width or a height of the zero-out block.2. The image decoding method of claim 1 , wherein the width of the zero-out block is smaller than the width of the current block.3. The image decoding method of claim 1 , wherein the height of the zero-out block is smaller than the height of the current block.4. The image decoding method of claim 1 , wherein the last significant coefficient position information ...

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Номер записи: 126
10-02-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL ON BASIS OF SECONDARY TRANSFORM

Номер: US20220046259A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

Disclosed is a method for decoding a video signal, including: generating a dequantized transform block by performing dequantization for a current block; acquiring an intra prediction mode of the current block; determining a secondary transform set applied to the current block among a plurality of secondary transform sets based on the intra prediction mode; deriving a transform kernel applied to the current block in the determined secondary transform set; and performing secondary transform for a top left specific area of the dequantized transform block by using the derived transform kernel, in which the plurality of secondary transform sets may include at least one mixed secondary transform set. 110.-. (canceled)11. A method for decoding a video signal , comprising:acquiring an intra prediction mode of a current block;obtaining dequantized transform coefficients for the current block;determining a secondary transform set applied to the current block among a plurality of secondary transform sets based on the intra prediction mode;acquiring a secondary transform index specifying a transform kernel in the secondary transform set;applying the transform kernel to the dequantized transform coefficients to generate secondary inverse-transformed coefficients; andperforming primary inverse-transform for the secondary inverse-transformed coefficients to generate residual samples of the current block,wherein the secondary transform index is binarized in a truncated unary scheme based on a number of available transform kernels in the secondary transform set.12. The method of claim 11 , wherein each of the plurality of secondary transform sets includes two transform kernels.13. The method of claim 11 , wherein the plurality of secondary transform sets include at least one mixed secondary transform set.14. The method of claim 13 , wherein the mixed secondary transform set includes at least one 8×8 transform kernel applied to an 8×8 size area and at least one 4×4 transform kernel ...

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Номер записи: 127
10-02-2022 дата публикации

IMAGE CODING USING TRANSFORM INDEX

Номер: US20220046281A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, NAM Junghak
Принадлежит:

An image decoding method according to the present document comprises the steps of: receiving image information including residual information for a current block; and generating residual samples of the current block on the basis of the residual information, wherein the residual information includes information on transform coefficients of the current block, and the residual samples are generated from the information on the transform coefficients on the basis of low-frequency non-separable transform (LFNST) index information. 1. An image decoding method performed by a decoding apparatus , the method comprising:receiving image information including residual information for a current block;deriving prediction samples of the current block based on intra prediction;generating residual samples of the current block based on the residual information; andgenerating reconstructed samples for the current block based on the prediction samples and the residual samples,wherein the image information includes intra prediction type information for the current block,the intra prediction type information includes a matrix based intra prediction (MIP) flag representing whether MIP is applied to the current block,based on an intra mode being applied to the current block and the MIP flag representing that the MIP is not applied, the image information includes low frequency non-separable transform (LFNST) index information related to one of transform kernels in an LFNST transform set for the current block,the residual information includes information on quantized transform coefficients of the current block, andthe residual samples are generated based on the information on the quantized transform coefficients by using the LFNST index information.2. The image decoding method of claim 1 , wherein the LFNST index information comprises an LFNST flag representing whether a non-separable transform for low-frequency transform coefficients of the current block is applied claim 1 , and a transform ...

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Номер записи: 128
10-02-2022 дата публикации

IMAGE CODING METHOD ON BASIS OF TRANSFORMATION AND DEVICE THEREFOR

Номер: US20220046282A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

An image decoding method performed by means of a decoding device according to the present invention comprises the steps of: deriving quantized transform coefficients with respect to a target block from a bitstream; performing inverse quantization with respect to the quantized transform coefficients with respect to the target block and deriving transform coefficients; deriving residual samples with respect to the target block on the basis of reduced inverse transform with respect to the transform coefficients; and generating a reconstructed picture on the basis of the residual samples with respect to the target block and prediction samples with respect to the target block. The reduced inverse transform is performed on the basis of a reduced inverse transform matrix. The reduced inverse transform matrix is a non-square matrix of which the number of columns is smaller than the number of rows. 1. An image decoding method performed by a decoding apparatus , the method comprising:obtaining information on quantized transform coefficients from a bitstream;deriving quantized transform coefficients for a target block based on the information on the quantized transform coefficients;deriving transform coefficients by performing dequantization for the quantized transform coefficients for the target block;performing an inverse transform for the transform coefficients based on an inverse transform matrix;deriving residual samples for the target block based on a result of the inverse transform; andgenerating a reconstructed picture based on (i) the residual samples for the target block and (ii) prediction samples for the target block,wherein a size of the target block is K×K, where K is a positive integer,wherein an area to which the inverse transform is applied is included in a region of size M×M, where M is a positive integer less than K, andwherein based on a number of input elements in the area to which the inverse transform is applied being R, a size of the inverse transform ...

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Номер записи: 129
01-05-2014 дата публикации

Method for encoding and decoding image information

Номер: US20140119433A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon
Принадлежит: LG ELECTRONICS INC

The present invention relates to a method for encoding and decoding image information and to an apparatus using same, and the method for encoding the image information, according to the present invention, comprises the steps of: generating a recovery block; applying a deblocking filter to the recovery block; applying a sample adaptive offset (SAO) to the recovery block to which the deblocking filter is applied; and transmitting the image information including information on the SAO which is applied, wherein in the step of transmitting, information for specifying bands that cover a scope of a pixel value, to which a band off set is applied, is transmitted when the band offset is applied during the step of applying the SAO.

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Номер записи: 130
17-02-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR

Номер: US20220053189A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, NAM Junghak
Принадлежит:

An image decoding method according to the present document comprises a step for performing inverse first-order transform and inverse non-separable transform on a residual sample. The inverse non-separable transform is performed on the basis of a transform index indicating a predetermined transform kernel matrix, the inverse first-order transform is performed on the basis of a multiple transform selection (MTS) index indicating MTS for a horizontal transform kernel and a vertical transform kernel, and a syntax element bin string for the transform index is derived on the basis of first context information when a tree type for a split structure of a target block is not a single tree type and is derived on the basis of second context information when the tree type is the single tree type. 115-. (canceled)16. An image decoding method performed by a decoding apparatus , the method comprising:receiving a bitstream comprising residual information;deriving transform coefficients for a target block based on the residual information;deriving modified transform coefficients based on an inverse non-separable transform of the transform coefficients;deriving residual samples for the target block based on an inverse primary transform of the modified transform coefficients; andgenerating a reconstructed picture based on the residual samples for the target block,wherein the inverse non-separable transform is performed based on a transform index indicating a predetermined transform kernel matrix,wherein the inverse primary transform is performed based on a multiple transform selection (MTS) index indicating an MTS of a horizontal transform kernel and a vertical transform kernel, andwherein based on a tree type of a partition structure of the target block being not a single tree type, a syntax element bin string of the transform index is derived based on first context information, and based on the tree type being the single tree type, the syntax element bin string of the transform ...

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Номер записи: 131
17-02-2022 дата публикации

Video encoding method, video decoding method, and device using same

Номер: US20220053203A1
Автор: Byeongmoon Jeon, Chulkeun Kim, Hendry Hendry, Jaehyun LIM, Joonyoung Park, Jungsun Kim, Naeri PARK, Seungwook Park, Yongjoon Jeon
Принадлежит: LG ELECTRONICS INC

The present invention relates to a video encoding method, a video decoding method, and a device using the same, and the video encoding method according to the present invention comprises the steps of: specifying a tile and a slice by partitioning an inputted picture; performing encoding on the basis of the tile and the slice; and transmitting the encoded video information, wherein the picture is partitioned into one or more tiles and one or more slices, and the restrictions for parallel processing can be applied to the tiles and the slices.

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Номер записи: 132
17-02-2022 дата публикации

VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR

Номер: US20220053217A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, NAM Junghak, SALEHIFAR Mehdi
Принадлежит:

A video transform method includes: receiving a quantized transform coefficient for a target block and a transform index for a non-separated secondary transform; inverse-quantizing the quantized transform coefficient; deriving an input transform coefficient size indicating the length of the inverse-quantized transform coefficient to which the non-separated secondary transform has been applied, an output transform coefficient size indicating the length of a modified transform coefficient to which the non-separated secondary transform has been applied, and a transform set mapped to the intra mode of the target block, when the transform index does not indicate that the non-separated secondary transform is not performed; and deriving the modified transform coefficient on the basis of a matrix operation on a transform kernel matrix in the transform set indicated by the transform index, and a transform coefficient list corresponding to the input transform coefficient size. 1. An image transform method performed by a decoding apparatus , the method comprising:receiving quantized transform coefficients for a target block and a transform index for a non-separable secondary transform;dequantizing the quantized transform coefficients;deriving an input transform coefficient size related to a length of the dequantized transform coefficients to which the non-separable secondary transform is applied, an output transform coefficient size related to a length of modified transform coefficients to which the non-separable secondary transform has been applied, and a transform set mapped to an intra mode for the target block based on the transform index not indicating that the non-separable secondary transform is not performed; andderiving the modified transform coefficients based on a matrix operation of a transform kernel matrix in the transform set indicated by the transform index and a transform coefficient list corresponding to the input transform coefficient size.2. The image ...

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Номер записи: 133
04-02-2021 дата публикации

METHOD FOR PROCESSING IMAGE AND DEVICE THEREFOR

Номер: US20210037266A1
Автор: JANG Hyeongmoon, KIM Seunghwan, Lim Jaehyun, NAM Junghak
Принадлежит:

Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element. 1. A method for decoding an image , the method comprising:partitioning a current coding tree block into a plurality of coding blocks, based on the current coding tree block being out of a boundary of the current picture;parsing a first syntax element including information whether a current coding block is partitioned into a plurality of subblocks based on the current coding block satisfying a predetermined condition;parsing a second syntax element including information whether the current coding block is partitioned by using a quad-tree structure based on the first syntax element including information that the current coding block is partitioned;parsing at least one of a third syntax element including information whether the current coding block is partitioned by using a binary-tree structure or whether the current coding block is partitioned by using a ternary-tree structure and a fourth syntax element including information about a split direction of the current coding block, based on the second syntax element including information that the current coding block is not partitioned by using the quad-tree structure; anddetermining a split mode of the current coding block based on at least one of the first syntax element, the second syntax element, the third syntax element, and the fourth syntax element,wherein the ...

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Номер записи: 134
11-02-2016 дата публикации

METHOD AND DEVICE FOR INTRA PREDICTION

Номер: US20160044310A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

A method for decoding an image according to the present invention comprises the steps of receiving and decoding MPM index information for indicating an MPM candidate which is to be used as an intra prediction mode of a current block; generating an MPM candidate list containing a plurality of MPM candidates for the current block; determining the MPM candidate indicated by the decoded MPM index information as the intra prediction mode of the current block, among the plurality of the MPM candidates which constitute the MPM candidate list; and generating a prediction block corresponding to the current block by performing intra prediction for the current block based on the determined intra prediction mode. 118.-. (canceled)19. A video decoding method comprising the steps of:receiving and decoding index information indicating a candidate mode to be used as an intra prediction mode of a current block;constructing a candidate mode list including a plurality of candidate modes for the current block;determining, as the intra prediction mode of the current block, the candidate mode indicated by the decoded index information out of the plurality of candidate modes constituting the candidate mode list; andgenerating a predicted block corresponding to the current block by performing intra prediction on the current block on the basis of the determined intra prediction mode, setting a first candidate intra prediction mode corresponding to a first block adjacent to the left side of the current block and a second candidate intra prediction mode corresponding to a-second block adjacent to the upper side of the current block, and', 'setting the candidate modes of the candidate mode list using the first candidate intra prediction mode and a predetermined prediction mode when the first candidate intra prediction mode and the second candidate intra prediction mode are equal to each other., 'wherein the constructing the candidate mode list includes20. The video decoding method according to ...

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Номер записи: 135
24-02-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL

Номер: US20220060697A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

Embodiments of the present invention provide a method and apparatus for processing a video signal. A method for decoding an image signal according to an embodiment of the present invention comprises the steps of: for a current block having a width and a height different from each other, determining a modified intra prediction mode from an intra prediction mode, on the basis of a ratio between the width and the height of the current block and the intra prediction mode; determining an inverse non-separable transform set on the basis of the modified intra prediction mode; and applying an inverse non-separable transform matrix selected from the inverse non-separable transform set with respect to the top-left region of the current block, which is determined according to the width and the height of the current block. 114-. (canceled)15. A method for decoding an image signal , comprising:determining a modified intra prediction mode of a current block having a different width and height from an intra prediction mode, based on a ratio between the width and height of the current block and the intra prediction mode;obtaining prediction samples of the current block based on the modified intra prediction mode;determining an inverse non-separable transform set based on the modified intra prediction mode;applying an inverse non-separable transform matrix selected from the inverse non-separable transform set, to a top-left region of the current block determined based on the width and height of the current block;obtaining residual samples for the current block; andreconstructing the image signal based on the residual samples,wherein determining the inverse non-separable transform set comprises determining an index of the inverse non-separable transform set related to the modified intra prediction mode,wherein based on that the modified intra prediction mode is greater than or equal to 0 and smaller than or equal to 1, the index is determined as a first index value,wherein based on ...

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Номер записи: 136
24-02-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL

Номер: US20220060747A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHI FAR Mehdi
Принадлежит:

Embodiments of the present disclosure provide a method and device for processing a video signal. A method for decoding an image signal according to an embodiment of the present disclosure comprises the steps of: determining a non-separable transform set index indicating a non-separable transform set used for a non-separable transform of a current block from among non-separable transform sets predefined on the basis of an intra-prediction mode of the current block; determining. as a non-separable transform matrix, a transform kernel indicated by a non-separable transform index for the current block from among transform kernels included in the non-separable transform set indicated by the non-separable transform set index; and applying the non-separable transform matrix to an upper left region which of the current block, which is determined according to the width and height of the current block, wherein each of the predefined non-separable transform sets includes two transform kernels. 114-. (canceled)15. A method for decoding an image signal by an apparatus , comprising:determining a non-separable transform set index indicating a non-separable transform set for a current block, based on an intra prediction mode of the current block, among predetermined non-separable transform sets;determining a transform kernel included in the non-separable transform set as a non-separable transform matrix for the current block;applying the non-separable transform matrix for the current block to a top-left region of the current block, the top-left region being determined based on a width and a height of the current block; andperforming primary inverse transform on the top-left region to which the non-separable transform matrix is applied,wherein the non-separable transform set index has one index value among 4 index values, according to an intra prediction mode range to which the intra prediction mode of the current block belong,wherein the transform kernel for the current block is ...

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Номер записи: 137
24-02-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO DATA

Номер: US20220060749A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit. 1. A method for encoding a bitstream for a video signal by an encoding apparatus , the method comprising:determining prediction type information of a current block, the prediction type information specifying whether the current block is coded in inter mode or intra mode;encoding a luma intra prediction mode of the current block to the bitstream, based on that the prediction type information indicates that the current block is intra-coded, wherein the luma intra prediction mode is an intra prediction mode for a luma sample of the current block;determining a chroma intra prediction mode of the current block; andencoding intra chroma prediction mode information of the current block to the bitstream, the intra chroma prediction mode information specifying the chroma intra prediction mode of the current block, wherein the chroma intra prediction mode is an intra prediction mode for a chroma sample of the current block;wherein, the intra chroma prediction mode information of the current block is determined according to a predefined table based on the luma intra prediction mode of the current block and the chroma intra prediction mode of the current block, andwherein, the intra chroma prediction mode information of the current block has a specific value, based on that the chroma intra prediction mode of the current block is equal to the luma intra prediction mode of the current block.2. A non-transitory computer-readable storage medium storing a bitstream generated by an encoding method , the encoding method comprising:determining prediction type information of a current block, the prediction type information specifying whether the current ...

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Номер записи: 138
24-02-2022 дата публикации

IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING MIP AND LFNST, AND METHOD FOR TRANSMITTING BITSTREAM

Номер: US20220060751A1
Автор: Kim Seung Hwan, KOO Moonmo, Lim Jaehyun, Nam Jung Hak
Принадлежит:

An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise generating a prediction block by performing intra prediction with respect to a current block, generating a residual block by performing inverse transform with respect to a transform coefficient of the current block, and reconstructing the current block based on the prediction block and the residual block. The inverse transform may comprise inverse primary transform and inverse secondary transform, and the inverse secondary transform may be performed based on whether intra prediction for the current block is matrix based intra prediction (MIP). 1. An image decoding method performed by an image decoding apparatus , the image decoding method comprising:generating a prediction block by performing intra prediction with respect to a current block;generating a residual block by performing inverse transform with respect to a transform coefficient of the current block; andreconstructing the current block based on the prediction block and the residual block,wherein the inverse transform comprises inverse primary transform and inverse secondary transform, and the inverse secondary transform is performed based on whether intra prediction for the current block is matrix based intra prediction (MIP).2. The image decoding method of claim 1 , wherein the inverse secondary transform is performed only upon determining that inverse secondary transform is performed with respect to the transform coefficient.3. The image decoding method of claim 2 , wherein the determination as to whether inverse secondary transform is performed with respect to the transform coefficient is performed based on information signaled through a bitstream.4. The image decoding method of claim 1 , wherein the inverse secondary transform comprises:determining a transform set of inverse secondary transform based on an intra prediction mode of the current block;selecting one of a ...

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Номер записи: 139
06-02-2020 дата публикации

PICTURE PROCESSING METHOD AND APPARATUS FOR SAME

Номер: US20200045305A1
Автор: JANG Hyeongmoon, Lim Jaehyun, NAM Junghak
Принадлежит: LG ELECTRONICS INC.

Disclosed is a method for processing an image and an apparatus therefor in the present invention. Particularly, a method for decoding an image may include generating a prediction block of a current processing block by using a prediction mode of the current processing block, wherein the current processing block indicates a block in which a leaf node block partitioned into a quadtree structure from a basic unit partitioning a picture is partitioned into a binary tree structure; determining whether a skip mode is applied to the current processing block; and generating a residual block of the current processing block, when the skip mode is not applied for the current processing block, wherein the step of generating the residual block includes decoding a syntax element indicating whether a residual signal is existed in a chroma component of the current processing block. 1. A method for decoding an image , comprising:generating a prediction block of a current processing block by using a prediction mode of the current processing block,wherein the current processing block indicates a block in which a leaf node block partitioned into a quadtree structure from a basic unit partitioning a picture is partitioned into a binary tree structure;determining whether a skip mode is applied to the current processing block; andgenerating a residual block of the current processing block, when the skip mode is not applied for the current processing block,wherein the step of generating the residual block includes decoding a syntax element indicating whether a residual signal is existed in a chroma component of the current processing block.2. The method of claim 1 , wherein the step of generating the residual block comprising:decoding a syntax element indicating whether a residual signal is existed in a luma component of the current processing block, when a residual signal is existed in the chroma component.3. The method of claim 2 , when a residual signal is not existed in the chroma ...

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Номер записи: 140
08-05-2014 дата публикации

METHOD AND APPARATUS FOR ENCODING/DECODING VIDEO IN INTRA PREDICTION MODE

Номер: US20140126629A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook
Принадлежит: LG ELECTRONICS INC.

Provided is a method for decoding video, which performs prediction in an intra mode. The method for decoding video according to the invention comprises steps of: creating a current table index using a code number and MPM index information; and deriving a current prediction mode by adopting an index mapping table in the current table index. According to the present invention, video encoding/decoding efficiency can be improved. 1. A video decoding method of predicting a current block in an intra mode , comprising the steps of:creating a current table index using a code number and MPM index information; andderiving a current prediction mode by applying an index mapping table to the current table index,wherein the MPM index information includes the number of MPM candidates and the index values of the MPM candidates, the MPM candidate indices are indices allocated to the MPM candidates in the index mapping table, the current prediction mode is an intra prediction mode of a current prediction unit, and the current table index is an index allocated to the current prediction mode in the index mapping table.2. The video decoding method according to claim 1 , further comprising a step of converting a codeword received from an encoder into the code number using an inverse VLC table.3. The video decoding method according to claim 1 , wherein the number of entries in the index mapping table is equal to the number of possible intra prediction modes of the current prediction unit.4. The video decoding method according to claim 1 , wherein the index values of the MPM candidates are derived by applying an inverse index mapping table to mode values of the MPM candidates.5. The video decoding method according to claim 1 , wherein the number of MPM candidates is a predetermined fixed value.6. The video decoding method according to claim 5 , wherein the predetermined fixed value is any of 2 claim 5 , 3 claim 5 , and 4.7. The video decoding method according to claim 1 , further ...

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Номер записи: 141
03-03-2022 дата публикации

METHOD FOR PROCESSING VIDEO SIGNAL BY USING TRANSFORM, AND APPARATUS THEREFOR

Номер: US20220070494A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun
Принадлежит:

A method for processing a video signal includes determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal, determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block, and applying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index. A width of the transform region is determined based on a comparison between the horizontal transform type index and a reference value, and a height of the transform region is determined based on a comparison between the vertical transform type index and the reference value. 1. A method for decoding a video signal using transform , comprising:determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal;determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block; andapplying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index,wherein a width of the transform region is determined as a smaller value between a width of the transform block and a first size if the horizontal transform type index is greater than a reference value and determined as a smaller value between the width of the transform block and a second size if the horizontal transform type index is not greater than the reference value,wherein a height of the transform region is determined as a smaller value between a height of the transform block and the first size if ...

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Номер записи: 142
03-03-2022 дата публикации

SYNTAX DESIGN METHOD AND APPARATUS FOR PERFORMING CODING BY USING SYNTAX

Номер: US20220070498A1
Автор: JANG Hyeongmoon, Lim Jaehyun, NAM Junghak
Принадлежит:

An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: decoding, on the basis of a bitstream, an affine flag that indicates whether affine prediction is applicable to a current block and a sub-block TMVP flag that indicates whether a temporal motion vector predictor based on a sub-block of the current block is usable; determining whether to decode a predetermined merge mode flag that indicates whether to apply a predetermined merge mode to the current block, on the basis of the decoded affine flag and the decoded sub-block TMVP flag; deriving prediction samples of the current block on the basis of the determining of whether to decode the predetermined merge mode flag; and generating reconstructed samples of the current block based on the prediction samples of the current block. 115.-. (canceled)16. An image decoding method performed by a decoding apparatus , the method comprising:receiving image information including affine enabled flag information, sub-block temporal motion vector prediction enabled flag information and residual information;determining whether to receive specific flag information related to whether a sub-block based specific merge mode is applied to a current block;receiving the specific flag information based on the determination;checking whether to receive a specific merge index for the sub-block based specific merge mode based on the specific flag information, the affine enabled flag information and the sub-block temporal motion vector prediction enabled flag information;deriving a prediction mode of the current block based on the result of the determination;deriving a prediction sample for the current block by applying inter prediction to the current block based on the derived prediction mode; andderiving a residual sample for the current block based on the residual information, generating a reconstructed sample based on the prediction sample and the residual sample,wherein the ...

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Номер записи: 143
13-02-2020 дата публикации

VIDEO DECODING METHOD AND DEVICE IN VIDEO CODING SYSTEM

Номер: US20200053364A1
Автор: Lim Jaehyun, SEO Jungdong
Принадлежит:

According to the present invention, a method by which a decoding device performs video decoding comprises the steps of: parsing a merge index of a current block; configuring a merge candidate list on the basis of neighboring blocks; selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list; deriving L0 motion information and L1 motion information of the current block on the basis of the selected merge candidate; deriving an L0 weight and an L1 weight of the current block; and generating a prediction sample of the current block by weighted-summing an L0 reference sample and an L1 reference sample on the basis of the L0 weight and the L1 weight. 1. An image decoding method performed by a decoding apparatus , the method comprising:parsing a merge index for a current block;configuring a merge candidate list based on neighboring blocks to the current block;selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list;deriving L0 motion information and L1 motion information for the current block based on the selected merge candidate;deriving a L0 reference sample based on the L0 motion information;deriving a L1 reference sample based on the L1 motion information;deriving a L0 weight and a L1 weight for the current block; andweighted-summing the L0 reference sample and the L1 reference sample based on the L0 weight and the L1 weight to generate a predicted sample of the current block.2. The method of claim 1 , wherein deriving the L0 weight and L1 weight for the current block includes:deriving a L0 weight of the selected merge candidate as the L0 weight for the current block; andderiving a L1 weight of the selected merge candidate as the L1 weight for the current block.3. The method of claim 1 , wherein deriving the L0 weight and L1 weight for the current block includes:deriving a most-frequently-used value among L0 weights values of the merge candidates ...

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Номер записи: 144
13-02-2020 дата публикации

METHOD AND DEVICE FOR TRANSMITTING IMAGE INFORMATION, AND DECODING METHOD AND DEVICE USING SAME

Номер: US20200053389A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, JEONG Sang Oh, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

An image decoding method according to the present invention comprises the steps o£ acquiring information to form a reference picture set of a current picture by entropy decoding the received bitstream information; and performing prediction on a prediction block inside the current picture by using a reference picture list which is formed based on the reference picture set. 1. (canceled)2. A video decoding method , by a decoding apparatus , the method comprising:acquiring first long term reference picture (LTRP) information in a sequence parameter set (SPS) from a bitstream;acquiring second LTRP information in a slice header from the bitstream;configuring a reference picture set based on the first LTRP information and the second LTRP information; andperforming an inter prediction on a current block in the current picture by using an LTRP in the reference picture set, wherein the LTRP is one of candidate LTRPs specified by the first LTRP information in the SPS,wherein the reference picture set comprises an LTRP set including at least one LTRP,wherein the first LTRP information in the SPS includes a long term reference pictures present flag,wherein when a value of the long term reference pictures present flag is equal to 1,the first LTRP information in the SPS further includes an LTRP number syntax element specifying a number of the candidate LTRPs specified in the SPS and an LTRP picture order count (POC) least significant bit (LSB) information specifying an LSB of a POC of each of the candidate LTRPs,the first LTRP information in the SPS further includes used by current picture long term SPS flag information specifying whether each of the candidate LTRPs specified in the SPS is not used for reference by the current picture, andwherein the second LTRP information in the slice header includes LTRP index information specifying an LTRP to be included in the LTRP set among at least one of the candidate LTRPs.3. The video decoding method according to claim 2 , wherein the ...

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Номер записи: 145
21-02-2019 дата публикации

METHOD FOR PROCESSING IMAGE AND APPARATUS THEREFOR

Номер: US20190058881A1
Автор: Lim Jaehyun, Park Naeri, SEO Jungdong
Принадлежит:

Disclosed are a method for processing an image and an apparatus therefor. Specifically, a method for decoding an image comprises: a step of deriving an initial block size information indicating information in which a first block, which is a basic unit for dividing an image, is divided into one or more initial blocks; a step of deriving a division information indicating information in which the initial block is divided into a plurality of second blocks in the initial block unit divided from the first block based on the initial block size information; and a step of decoding in a second block unit recursively divided from the initial block based on the division information. 1. A method for decoding an image , the method comprising:deriving an initial block size information indicating information in which a first block representing a basic unit for partitioning an image is partitioned into at least one initial block;deriving a partition information indicating information in which the at least one initial block is partitioned into a plurality of second blocks in units of the initial block partitioned from the first block based on the initial block size information; anddecoding the image in units of second blocks recursively partitioned from the initial block on the basis of the partition information.2. The method of claim 1 , whereinthe initial block size information is transmitted from an encoder.3. The method of claim 1 , whereinthe initial block size information is derived from partition information of a block which neighbors the first block.4. The method of claim 1 , whereinthe initial block size information is in inverse proportion to a degree of partitioning of the block which neighbors the first block.5. The method of claim 1 , whereinthe initial block size information is calculated by comparing a value derived from a size of the block which neighbors the first block with a specific threshold.6. The method of claim 1 , whereinthe initial block size information is ...

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Номер записи: 146
10-03-2022 дата публикации

METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL BY USING INTRA-PREDICTION

Номер: US20220078483A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun
Принадлежит:

Embodiments in the present specification provide a video signal processing method and device. A method of processing a video signal according to an embodiment in the present specification comprises the steps of: acquiring an intra-prediction mode for a current block from the video signal; determining a modified intra-prediction mode from the intra-prediction mode for the current block on the basis of the width and height of and the intra-prediction mode for the current block; and applying a transform determined on the basis of the modified intra-prediction mode. The accuracy of prediction can be further improved by deriving a modified intra-prediction mode according to a wide-angle intra-prediction mode according to the shape of and an intra-prediction mode for a current block. 1. A method for processing a video signal using intra prediction , the method comprising:obtaining an intra prediction mode of a current block from the video signal;determining a modified intra prediction mode from the intra prediction mode for the current block based on a width and a height of the current block and the intra prediction mode; andapplying a transform determined based on the modified intra prediction mode,wherein when (i) the width is larger than the height, (ii) the intra prediction mode is equal to or larger than 2, and (iii) the intra prediction mode is smaller than a first reference value, the modified intra prediction mode is determined by adding 65 to the intra prediction mode, andwherein when (i) the height is larger than the width, (ii) the intra prediction mode is larger than a second reference value, and (iii) the intra prediction mode is equal to or smaller than 66, the modified intra prediction mode is determined by subtracting 67 from the intra prediction mode.2. The method of claim 1 , wherein the first reference value and the second reference value are determined based on an absolute value of a log for a value obtained by dividing the width by the height.3. The ...

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Номер записи: 147
12-03-2015 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO DATA

Номер: US20150071352A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit. 1. (canceled)2. A method for decoding , by a decoding apparatus , a bitstream for a coded video signal comprising at least one block , the method comprising:determining, by the decoding apparatus, prediction type information of a current block, the prediction type information indicating whether the current block is intra-coded or inter-coded;determining, by the decoding apparatus, a luma intra prediction mode of the current block when the prediction type indicates that the current block is intra-coded, the luma intra prediction mode specifying an intra prediction mode for luma samples of the current block;obtaining, by the decoding apparatus, index information of the current block from the bitstream, the index information being used to specify an intra prediction mode for chroma samples of the current block;deriving, by the decoding apparatus, a chroma intra prediction mode according to a predefined table based on the determined luma intra prediction mode and the obtained index information; anddecoding, by the decoding apparatus, the chroma samples of the current block based on the derived chroma intra prediction mode,wherein, when the obtained index information has a predefined value, the chroma intra prediction mode is set equal to the luma intra prediction mode.3. The method of claim 2 , wherein the predefined table defines a relationship between the derived chroma intra prediction mode and a combination of the determined luma intra prediction mode and the obtained index information.4. The method of claim 2 , wherein the determining of the luma intra prediction mode includes:obtaining flag information indicating whether the luma ...

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Номер записи: 148
12-03-2015 дата публикации

INTER-LAYER PREDICTION METHOD AND APPARATUS USING SAME

Номер: US20150071356A1
Автор: Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

The present invention relates to an inter-layer prediction method and an apparatus using same. The inter-layer prediction method comprises: a step of inducing inter-layer motion information from a reference layer; and a step of performing a prediction on the current block in the current layer using the inter-layer motion information. The inter-layer motion information may include an inter-layer motion vector induced from the reference layer. 1. An inter-layer prediction method comprising:deriving inter-layer motion information from a reference layer; andpredicting a current block in a current layer using the inter-layer motion information,wherein the inter-layer motion information includes an inter-layer motion vector derived from the reference layer, andwherein the inter-layer motion vector is derived by scaling a motion vector of the reference layer on the basis of a resolution ratio of the reference layer and the current layer.2. The inter-layer prediction method according to claim 1 , wherein the motion vector of the reference layer is a motion vector at a reference position claim 1 , which corresponds to a position for specifying the current block in the reference layer.3. The inter-layer prediction method according to claim 2 , wherein the position for specifying the current block is a top-left position of the current block.4. The inter-layer prediction method according to claim 2 , wherein the reference position is derived by scaling the position for specifying the current block on the basis of the resolution ratio of the reference layer and the current layer.5. The inter-layer prediction method according to claim 2 , wherein the motion vector of the reference position is a motion vector of a prediction block including the reference position.6. The inter-layer prediction method according to claim 1 , wherein the predicting of the current block includes:constructing a candidate list including the inter-layer motion information depending on a prediction mode of ...

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Номер записи: 149
17-03-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE FOR SAME

Номер: US20220086449A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, NAM Junghak
Принадлежит:

An image decoding method according to the present document is characterized by including: a step for receiving a bitstream including residual information; a step for deriving transform coefficients for a target block on the basis of the residual information; a step for deriving corrected transform coefficients on the basis of an inverse non-separable transform of the transform coefficients; and a step for deriving residual samples for the target block on the basis of an inverse primary transform of the corrected transform coefficients, wherein the inverse non-separable transform is performed when the size of the target block is equal to or smaller than the size of a prescribed maximum transform application block. 1. An image decoding method performed by a decoding apparatus , the method comprising:receiving a bitstream including residual information;deriving transform coefficients for a target block based on the residual information;deriving modified transform coefficients based on an inverse non-separable transform for the transform coefficients;deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; andgenerating a reconstructed picture based on the residual samples for the target block,wherein the inverse non-separable transform is performed based on the size of the target block being equal to or smaller than the size of a predetermined maximum transform applied block.2. The image decoding method of claim 1 , wherein information on the size of the maximum transform applied block is further received.3. The image decoding method of claim 1 , wherein whether the inverse non-separable transform is performed is derived by comparing the larger of the width or height of the target block with the width or height of the maximum transform applied block.4. The image decoding method of claim 1 , wherein the size of the maximum transform applied block is 64×64.5. The image decoding method of claim 1 , ...

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Номер записи: 150
28-02-2019 дата публикации

INTER PREDICTION METHOD AND APPARATUS THEREFOR

Номер: US20190068978A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

According to the present invention, an inter prediction method comprises the steps of: generating a merge candidate list for a block to be predicted, wherein the block is to correspond to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted so as to generate a prediction block corresponding to the current prediction unit. 1. (canceled)2. An image decoding method comprising:receiving information on a parallel merge level;constructing merging candidate list for a current block, wherein the merging candidate list includes spatial merging candidates;deriving motion information of the current block based on the merging candidate list;deriving a predicted block with respect to the current block based on the derived motion information; andgenerating a reconstructed picture based on the predicted block,wherein the current block belongs to a parallel merging region, wherein a size of the parallel merging region is determined based on the information on the parallel merge level,wherein the current block is related to a prediction unit(PU), and the PU is one of PUs partitioned from a coding unit (CU),wherein for the PU, within the parallel merging unit region, the spatial merging candidates are identical to spatial merging candidates of a 2N×2N PU which has a same size as the parallel merging unit region, andwherein the spatial merging candidates of the 2N×2N PU which has the same size as the parallel merging unit region, are derived from a lower left corner neighboring block, a left neighboring block, an upper right corner neighboring block, an upper neighboring block and an upper left corner neighboring block of the parallel merging unit region.3. The method of claim 2 , wherein when a value of the information on the parallel merge level is 0 ...

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Номер записи: 151
09-03-2017 дата публикации

METHOD FOR ENCODING/DECODING IMAGE AND DEVICE THEREOF

Номер: US20170070754A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит: LG ELECTRONICS INC.

A method for image decoding, according to the present invention, includes the following steps: receiving image information including a plurality of filter coefficients; generating a restored block for a current block on the basis of the image information; and applying an adaptive loop filter to the restored block on the basis of the plurality of filter coefficients. According to the present invention, image encoding efficiency may be improved, and complexity may be reduced. 114-. (canceled)15. A picture decoding method by a decoding apparatus , comprising:receiving prediction information for a prediction process and offset information for a sample adaptive offset (SAO) process;deriving prediction samples based on the prediction information;generating a reconstructed picture based on the prediction samples; andapplying an in-loop filtering process to the reconstructed picture,wherein applying the in-loop filtering process includes applying a deblocking filtering process to the reconstructed picture, and applying the SAO process to a sample in the reconstructed picture on which the deblocking filtering process is completed,wherein the offset information includes offset type information indicating a SAO type applied to the sample, andwherein when the offset type information indicates that a band offset type is applied to the sample, the offset information includes explicit band information indicating one of 32 bands as a starting band of a band group consisting of n bands, and an offset corresponding to a band among the n bands is applied to the sample, wherein n is an integer.16. The method of claim 15 , wherein when the offset type information indicating the edge offset type is applied to the sample claim 15 , applying the SAO process comprises calculating the difference between the sample and the neighboring samples based on a direction of an edge specifying locations of the sample and the neighboring samples and determining the category of the sample based on the ...

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Номер записи: 152
19-03-2015 дата публикации

ENHANCED INTRA PREDICTION MODE SIGNALING

Номер: US20150078438A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

A method and apparatus for signaling and receiving a video signal for processing is disclosed. Methods for determining a most probable mode for predicting a current prediction block are provided as well as new methods for grouping intra prediction modes into prediction groups. Methods for predicting a prediction block of video data as well as signaling intra prediction modes are also provided. 1. (canceled)2. A method for processing a video signal , the method comprising:determining, with a decoding apparatus, a candidate mode list based on intra prediction mode information of neighboring blocks adjacent to a current block, the candidate mode list including at least three candidate prediction modes;obtaining, with the decoding apparatus, a mode indication flag of the current block from the video signal, the mode indication flag indicating whether an intra prediction mode of the current block is determined from one of the intra prediction mode information of the neighboring blocks; obtaining, with the decoding apparatus, first intra prediction mode information of the current block from the video signal;', 'reordering, with the decoding apparatus, the at least three candidate prediction modes such that a lower index is assigned to a candidate prediction mode having a lower value;', 'obtaining, with the decoding apparatus, second intra prediction mode information of the current block from the first intra prediction mode information based on the at least three reordered candidate prediction modes; and', 'decoding, with the decoding apparatus, the current block using the second intra prediction mode information,', 'wherein obtaining the second intra prediction mode information comprises:', 'comparing the first intra prediction mode information with one of the at least three reordered candidate prediction modes, and', 'increasing a value of the first intra prediction mode information by one when the first intra prediction mode information is greater than or equal to the ...

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Номер записи: 153
11-03-2021 дата публикации

IMAGE DECODING METHOD AND APPARATUS RELYING ON INTRA PREDICTION IN IMAGE CODING SYSTEM

Номер: US20210076027A1
Автор: CHOI Jangwon, CHOI Jungah, HEO Jin, KIM Seunghwan, Li Ling, Lim Jaehyun, YOO Sunmi
Принадлежит:

According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60. 115.-. (canceled)16. An image decoding method performed by a decoding device , the method comprising:parsing remaining intra prediction mode information and residual information for a current block;deriving neighboring samples of the current block;deriving most probable mode (MPM) list including MPM candidates of the current block; deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates;deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples;deriving a residual sample of the current block based on the residual information; andderiving a reconstructed picture based on the prediction sample and the residual sample,wherein the remaining intra prediction mode information is bypass coded based on a truncated binary (TB) binarization process, andwherein a binarization parameter for the TB binarization process is 60,wherein the remaining intra prediction mode information equal to ...

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Номер записи: 154
15-03-2018 дата публикации

METHOD FOR STORING MOTION INFORMATION AND METHOD FOR INDUCING TEMPORAL MOTION VECTOR PREDICTOR USING SAME

Номер: US20180077425A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit. 120-. (canceled)21. A method for inter prediction , by a decoding apparatus , comprising:determining a positioning pixel for a temporal motion vector predictor (TMVP) of a current block in a current picture;deriving a co-located prediction block (colPb) in a reference picture based on the positioning pixel;deriving a motion vector of the co-located prediction block (colPb) in the reference picture;deriving the temporal motion vector predictor (TMVP) of the current block in the current picture based on the motion vector of the co-located prediction block (colPb) in the reference picture; andgenerating a prediction sample of the current block based on the TMVP derived based on the motion vector of the colPb in the reference picture,wherein the current block corresponds to a current prediction block (PB),wherein the co-located prediction block (colPb) is a prediction block covering a modified location that is determined based on a location of the positioning pixel, andwherein the positioning pixel is determined as a pixel at a right-bottom side among four pixels located at the center of a co-located block in the reference picture, wherein the co-located block is a block corresponding to the current block and located in the reference picture.22. The method of claim 21 , wherein the modified location is specified by ((xPCtr>>4)<<4 claim 21 , (yCtr>>4)<<4)) claim 21 , wherein (xPCtr claim 21 , yPCtr) is the ...

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Номер записи: 155
16-03-2017 дата публикации

METHOD FOR STORING MOTION INFORMATION AND METHOD FOR INDUCING TEMPORAL MOTION VECTOR PREDICTOR USING SAME

Номер: US20170078688A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit. 120-. (canceled)21. A method for inter prediction comprising:deriving a temporal motion vector predictor (TMVP) for a current block of a current picture based on a motion vector of a co-located prediction block (colPb) in a reference picture, wherein the colPb is a prediction block covering a modified location that is determined based on a location of a positioning pixel, and the positioning pixel is determined as a pixel at a right-bottom side among four pixels located at the center of a co-located block in the reference picture, wherein the co-located block is a block corresponding to the current block and located in the reference picture;deriving a motion vector of the current block of the current picture based on the temporal motion vector predictor derived based on the motion vector of the colPb in the reference picture;generating a prediction pixel on the current block of the current picture based on the motion vector of the current block of the current picture; andreconstructing the current picture based on the prediction pixel on the current block of the current picture.22. The method of claim 21 , wherein the modified location is specified by ((xPCtr>>4)<<4 claim 21 , (yCtr>>4)<<4)) claim 21 , wherein (xPCtr claim 21 , yPCtr) is the location of the positioning pixel.23. The method of claim 22 , wherein the modified location is a location of a pixel at a top left corner in a motion data storage ...

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Номер записи: 156
18-03-2021 дата публикации

IMAGE CODING METHOD ON BASIS OF SECONDARY TRANSFORM AND DEVICE THEREFOR

Номер: US20210084314A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

An image information decoding method performed by means of a decoding device according to the present invention comprises the steps of: decoding a non-separable secondary transform (NSST) index from a bitstream if NSST is applied to a target block; decoding information relating to transform coefficients with respect to the target block from the bitstream on the basis of the decoded NSST index; and deriving the transform coefficients with respect to the target block on the basis of the decoded information relating to the transform coefficients, wherein the NSST index is decoded prior to the information relating to the transform coefficients with respect to the target block. 1. An image information decoding method performed by a decoding apparatus , the decoding method comprising:decoding a non-separable secondary transform (NSST) index from a bitstream, if an NSST is applied to a target block;decoding information about transform coefficients for the target block from the bitstream, based on the decoded NSST index; andgenerating the transform coefficients for the target block based on the decoded information about the transform coefficients,wherein the NSST index is decoded prior to the information about the transform coefficients for the target block.2. The image information decoding method of claim 1 , wherein if the NSST index is greater than 0 claim 1 , the transform coefficients for the target block in a range of an R+1to Ntransform coefficients are determined as 0 claim 1 , andwherein the size of a transform matrix for the NSST is the R× the N, the N is the square of a length of one side of a block comprised in the target block to which the NSST is applied, and the R is smaller than the N.3. The image information decoding method of claim 2 , wherein the information about the transform coefficients for the target block comprises: at least one of information about the location of a last non-zero transform coefficient claim 2 , group flag information indicating ...

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Номер записи: 157
18-03-2021 дата публикации

METHOD FOR INTRA PREDICTION AND DEVICE THEREFOR

Номер: US20210084331A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

A method for intra prediction comprises determining a first MPM candidate corresponding to a left-side candidate block on the basis of a position of the left-side candidate block adjacent to a left side of a current block; determining a second MPM candidate corresponding to an upper-end candidate block on the basis of a position of the upper-end candidate block adjacent to an upper end of the current block; generating an MPM candidate list including a plurality of MPM candidates, on the basis of the first MPM candidate and the second MPM candidate; and determining one MPM candidate of the plurality of the MPM candidates that constitute the MPM candidate list as an intra prediction mode of the current block, and performing intra prediction for the current block on the basis of the determined intra prediction mode to generate a prediction block corresponding to the current block. 1. An intra prediction method by a decoding apparatus , the method comprising:determining an availability of a left neighboring block;deriving a first candidate intra prediction mode based on the availability of the left neighboring block;determining an availability of an upper neighboring block;deriving a second candidate intra prediction mode based on the availability of the upper neighboring block;deriving an intra prediction mode of the current block based on the first candidate intra prediction mode and the second candidate intra prediction mode; andderiving a prediction sample in the current block based on the derived intra prediction mode;wherein when the left neighboring block is not available and the upper neighboring block is available, the first candidate intra prediction mode is set to an intra planar mode and an intra prediction mode of the upper neighboring block is used as the second candidate intra prediction mode;wherein when the upper neighboring block is located outside of a current largest coding unit (LCU) to which the current block belongs or the upper neighboring block ...

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Номер записи: 158
31-03-2022 дата публикации

Video coding method based on secondary transform, and device therefor

Номер: US20220103824A1
Автор: Jaehyun LIM, Mehdi SALEHIFAR, Moonmo KOO, Seunghwan Kim
Принадлежит: LG ELECTRONICS INC

A video decoding method according to the present document comprises the steps of: deriving transform coefficients by performing de-quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein an inverse RST using a transform kernel matrix is performed on transform coefficients of an upper-left 4×4 region of an 8×8 region of the target block, and modified transform coefficients of the upper-left 4×4 region, an upper-right 4×4 region, and a lower-left 4×4 region of the 8×8 region are derived through the inverse RST.

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Номер записи: 159
25-03-2021 дата публикации

METHOD AND DEVICE FOR INTRA PREDICTION

Номер: US20210092407A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

A method for decoding an image according to the present invention comprises the steps of: receiving and decoding MPM index information for indicating an MPM candidate which is to be used as an intra prediction mode of a current block; generating an MPM candidate list containing a plurality of MPM candidates for the current block; determining the MPM candidate indicated by the decoded MPM index information as the intra prediction mode of the current block, among the plurality of the MPM candidates which constitute the MPM candidate list; and generating a prediction block corresponding to the current block by performing intra prediction for the current block based on the determined intra prediction mode. 2. The method of claim 1 , wherein a first intra mode is derived based on the first block and a second intra mode is derived based on the second block claim 1 ,wherein the first ordered candidate mode and the second ordered candidate mode are derived based on the first intra mode and the second intra mode.3. The method of claim 2 , wherein the second intra mode is set to be the DC mode based on a case that the second block is not available.4. The method of claim 2 , wherein the constructing the candidate mode list includes determining that the first block is not available based on a case that the first block is located outside a current picture or a current slice and determining that the second block is not available based on a case that the second block is located outside of the current picture or the current slice.5. The method of claim 2 , wherein the constructing the candidate mode list includes determining that the first block is not available based on a case that the first block is not a block coded with an intra mode and determining that the second block is not available based on a case that the second block is not a block coded with an intra mode.6. The method of claim 2 , wherein the first intra mode is set to the first ordered candidate mode and the second ...

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Номер записи: 160
25-03-2021 дата публикации

METHOD FOR PARTITIONING BLOCK AND DECODING DEVICE

Номер: US20210092442A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency. 1. An image decoding method performed by a decoding apparatus , the method comprising:determining a size of a minimum coding unit, wherein the minimum coding unit represents a smallest coding unit derivable from a largest coding unit based on a quad-tree structure;deriving a current coding unit, wherein a coding unit is split into multiple coding units in a current picture, wherein the current coding unit is one of the multiple coding units, and wherein an intra prediction is applied on the current coding unit;checking whether a size of the current coding unit is equal to the size of the minimum coding unit;deriving one or multiple prediction units from the current coding unit based on the result of the checking;receiving intra prediction mode information for each of the derived one or multiple prediction units; andperforming the intra prediction with respect to the derived one or multiple prediction units based on the intra prediction mode information,wherein based on the size of the current coding unit being equal to the size of the minimum coding unit, explicit partition information is received and the one or multiple prediction units are derived from the current coding unit based on the explicit partition information, andwherein based on the size of the current coding unit being different from the size of the minimum coding unit, the one prediction unit of a same size as the current coding unit is derived without receiving the explicit partition information, and the current coding unit ...

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Номер записи: 161
05-05-2022 дата публикации

Intra-prediction method using filtering, and apparatus using the method

Номер: US20220141486A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Jaewon Sung, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon, Younghee CHOI
Принадлежит: LG ELECTRONICS INC

Disclosed are an intra-prediction method using filtering and an apparatus using the method. An image-decoding method comprises: a step of filtering an n upper reference pixel of a block to be predicted and neighboring pixels of the n upper reference pixel so as to obtain the filtered n upper reference pixel; and a step of filtering an n left reference pixel of a block to be predicted and neighboring pixels of the n left reference pixel so as to obtain the filtered n left reference pixel. According to the present invention, intra-prediction may be efficiently performed to improve image-encoding/decoding efficiency.

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Номер записи: 162
05-05-2022 дата публикации

IMAGE CODING METHOD BASED ON TRANSFORM, AND DEVICE FOR SAME

Номер: US20220141491A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun
Принадлежит:

An image decoding method according to the present document may include the steps of: deriving the position of the final significant coefficient in the current block and transform coefficients for the current block on the basis of residual information; determining whether the index of a sub-block including the final significant coefficient is 0 and whether the position of the final significant coefficient in the sub-block is greater than 0; determining whether a significant coefficient exists in a second area excluding a first area at the upper left end of the current block; and parsing an LFNST index from a bitstream when the position of the final significant coefficient is determined to be greater than 0 in the sub-block in which the index is 0, and the significant coefficient does not exist in the second area.

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Номер записи: 163
09-04-2015 дата публикации

Method and apparatus for processing video signal

Номер: US20150098511A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Jaewon Sung, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon, Younghee CHOI
Принадлежит: LG ELECTRONICS INC

The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value.

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Номер записи: 164
21-03-2019 дата публикации

Method for storing motion information and method for inducing temporal motion vector predictor using same

Номер: US20190089977A1
Автор: Byeongmoon Jeon, Jaehyun LIM, Jaewon Sung, Joonyoung Park, Jungsun Kim, Seungwook Park, Yongjoon Jeon, Younghee CHOI
Принадлежит: LG ELECTRONICS INC

A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit.

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Номер записи: 165
19-03-2020 дата публикации

METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL

Номер: US20200092547A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The present invention relates to a method and apparatus for encoding or decoding a video signal. According to the present invention, a plurality of reference units for image prediction of the current unit is acquired and combined to obtain a unit prediction value, thereby improving the accuracy of image prediction. More particularly, the present invention relates to a method for inducing a variety of reference units using a motion vector prediction value or a motion vector which is used in conventional inter-prediction, and also relates to a method which combines the reference units so as to obtain the prediction value for the current unit. In addition, the present invention relates to a method which involves acquiring a plurality of reference units for a merging mode, and combining the reference units so as to perform image prediction. 1obtaining, with the decoding apparatus, merge indication information from the coded video data bitstream, the merge indication information indicating whether inter prediction information of a current block is derived from inter prediction information of a neighboring block adjacent to the current block;constructing, with the decoding apparatus, a merging candidate list based on the merge indication information, the merging candidate list including a plurality of merging candidates, the merging candidates including inter prediction information of neighboring blocks; wherein the deriving the supplementary merging candidate comprises:', 'extracting, with the decoding apparatus, inter prediction information for first-direction prediction from one of the neighboring blocks;', 'extracting, with the decoding apparatus, inter prediction information for second-direction prediction from another of the neighboring blocks; and', 'combining, with the decoding apparatus, the extracted inter prediction information for first-direction prediction and inter prediction information for second-direction prediction;, 'deriving, with the decoding ...

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Номер записи: 166
19-03-2020 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE AND DEVICE USING SAME

Номер: US20200092573A1
Автор: Choi Younghee, CHUNG Taeil, Jeon Byeongmoon, Jeon Yongjoon, Kim Jingyeong, Kim Jungsun, KIM SangChul, Lim Jaehyun, PARK Joongyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The method for deriving a temporal motion vector predictor according to the present invention comprises the steps of: selecting a reference picture for a current block; deciding a predictor block corresponding to a predetermined storage unit block, as a reference prediction unit for the current block, in the reference picture; and deriving the temporal motion vector predictor from motion information of the decided reference prediction unit. The present invention enhances image compression efficiency. 110-. (canceled)11. A method of video decoding by a decoding apparatus , the method comprising:deriving a prediction mode for a current block as an inter prediction mode based on received information;deriving a temporal motion vector predictor candidate for the current block;deriving a motion vector of the current block based on the temporal motion vector predictor candidate;deriving a predicted pixel of the current block based on the motion vector of the current block; andgenerating a reconstructed picture based on the predicted pixel,wherein deriving the temporal motion vector predictor candidate comprises:determining a reference prediction unit (colPu) which is a prediction block encompassing a modified location (x, y); andderiving the temporal motion vector predictor candidate based on motion information of the colPu in a reference picture,wherein the modified location is specified by a position ((xPCtr>>4)<<4, (yPCtr>>4)<<4), wherein a position (xPCtr, yPCtr) is a position of a pixel located at the bottom right side among four central pixels of a co-located block, and wherein the co-located block is a block with a same position and a same size as the current block and is located in the reference picture.12. The method of claim 11 , wherein the position (xPCtr claim 11 , yPCtr) is specified by xPCtr=xP+(nPSW>>1) claim 11 , yPCtr=yP+(nPSH>>1) claim 11 , a position (xP claim 11 , yP) is a position of top left sample of the current block claim 11 , nPSW and nPSH are ...

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Номер записи: 167
16-04-2015 дата публикации

INTER-LAYER PREDICTION METHOD AND ENCODING DEVICE AND DECODING DEVICE USING SAME

Номер: US20150103896A1
Автор: Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

The present invention relates to an inter-layer prediction method, and an encoder and a decoder using the same, the inter-layer prediction method including specifying a reference block in a reference layer and predicting a current block in a current layer using information on the reference block, wherein the specifying of the reference block includes specifying the reference block on the basis of a reference position which is a position in the reference layer corresponding to a current position in the current layer for specifying the current block. 1. An inter-layer prediction method comprising:specifying a reference block in a reference layer; andpredicting a current block in a current layer using information on the reference block,wherein the specifying of the reference block comprises specifying the reference block on the basis of a reference position which is a position in the reference layer corresponding to a current position in the current layer for specifying the current block.2. The inter-layer prediction method according to claim 1 , wherein the specifying of the reference block comprises adjusting the reference position to be within a size range of the reference layer when the reference position is out of the size range of the reference layer.3. The inter-layer prediction method according to claim 1 , wherein the specifying of the reference block comprises adjusting the reference position to be on a boundary of the reference layer when the reference position is out of a size range of the reference layer.4. The inter-layer prediction method according to claim 1 , wherein the specifying of the reference block comprises adjusting a position corresponding to the reference position in a reference layer scaled to a resolution of the current layer to be within a size range of the current layer when the position corresponding to the reference position is out of the size range of the current layer.5. The inter-layer prediction method according to claim 1 , wherein ...

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Номер записи: 168
01-04-2021 дата публикации

METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL

Номер: US20210099704A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, SALEHIFAR Mehdi
Принадлежит:

Embodiments of the disclosure provide a method and apparatus for processing video signals. An image signal decoding method according to an embodiment of the disclosure comprises the steps of: determining, on the basis of the height and width of a current block, an input length and output length of a non-separable transform; determining a non-separable transform matrix corresponding to the input length and output length of the non-separable transform; and applying the non-separable transform matrix to the current block, wherein, when the height and width of the current block are 4 each, the input length and output length of the non-separable transform are determined to be 8 and 16 respectively. 112-. (canceled)13. A method for decoding an image signal , comprising:determining an input length and an output length of a non-separable transform based on a size of a current block;determining a non-separable transform matrix based on an intra prediction mode of a current block; andapplying the non-separable transform matrix to coefficients of the current block,wherein the input length and the output length of the non-separable transform are respectively determined as 8 and 16, based on the size of the current block being 4×4.14. The method of claim 13 , wherein the applying the non-separable transform matrix comprises:applying the non-separable transform matrix to a number of coefficients corresponding to the input length among the coefficients of the current block.15. The method of claim 13 , wherein the input length and the output length of the non-separable transform are respectively determined as 16 and 16 claim 13 , based on each of a height and a width of the current block being not equal to 8.16. The method of claim 15 , wherein applying the non-separable transform matrix comprises:applying the non-separable transform matrix to a top-left 4×4 region of the current block based on that each of the height and the width of the current block is not equal to 4 and a ...

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Номер записи: 169
12-05-2022 дата публикации

CODING OF INFORMATION ABOUT TRANSFORM KERNEL SET

Номер: US20220150497A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, NAM Junghak
Принадлежит:

An image decoding method includes: acquiring a multiple transform selection (MTS) index and residual information from a bitstream; deriving transform coefficients for the current block on the basis of the residual information; and generating residual samples of the current block on the basis of the MTS index and the transform coefficients, wherein the MTS index indicates a transform kernel set to be applied to the current block among transform kernel set candidates, at least one bin among bins of a bin string of the MTS index is derived on the basis of context coding, the context coding is performed on the basis of values of increase and decrease in a context index pertaining to the MTS index, and a single value of increase and decrease in the context index can be used for the context coding of the first bin among the bins of the bin string. 1. An image decoding method performed by a decoding apparatus , the method comprising:obtaining multiple transform selection (MTS) index and residual information from a bitstream;deriving transform coefficients for a current block based on the residual information; andgenerating residual samples of the current block based on the MTS index and the transform coefficients,wherein the MTS index represents a transform kernel set to be applied to the current block among transform kernel set candidates,at least one of bins of a bin string of the MTS index is derived based on context coding,the context coding is performed based on a value of context index increment about the MTS index, andthe number of context index increment values that can be used for the context coding of the first bin among the bins of the bin string is one.2. The image decoding method of claim 1 , wherein the value of the context index increment for the first bin among the bins of the bin string is 0 claim 1 , the value of the context index increment for the second bin among the bins of the bin string is 1 claim 1 , the value of the context index increment for the ...

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Номер записи: 170
12-05-2022 дата публикации

METHOD AND APPARATUS FOR IMAGE CODING BASED ON TRANSFORM

Номер: US20220150503A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun
Принадлежит:

An image decoding method according to the present document comprises the step of: deriving transform coefficients of a current block on the basis of residual information, wherein the residual information includes first flag information indicating whether a sub-block transform of splitting and transforming a coding unit is applied to the current block, and the step of deriving the transform coefficients comprises the step of, when the first flag information is 1, deriving a zero-out block indicating an area of the current block, in which a valid transform coefficient can exist, on the basis of whether a multiple transform selection (MTS) using multiple transform kernels is applied to the current block. 1. An image decoding method performed by a decoding apparatus , the method comprising:receiving a bitstream including residual information;deriving transform coefficients for a current block based on the residual information;deriving residual samples for the current block based on the transform coefficients,deriving prediction samples for the current block; andgenerating a reconstructed picture based on the residual samples and the prediction samples,wherein the residual information includes first flag information related to whether subblock transform for performing transform by partitioning a coding unit is applied to the current block, andwherein the deriving of the transform coefficients comprises deriving a zero-out block related to a region in which a significant transform coefficient may exist in the current block based on whether Multiple Transform Selection (MTS) using a plurality of transform kernels being applied to the current block when the first flag information is 1.2. The image decoding method of claim 1 , wherein a width or height of the zero-out block is set to 16 based on the MTS being applied claim 1 , andwherein the width or height of the zero-out block is set to 32 or less based on the MTS being not applied.3. The image decoding method of claim 2 , ...

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Номер записи: 171
12-05-2022 дата публикации

TRANSFORM-BASED IMAGE CODING METHOD AND APPARATUS THEREFOR

Номер: US20220150513A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun
Принадлежит:

An image decoding method according to the present document comprises the steps of: deriving a transform coefficient for a current block on the basis of residual information; deriving a residual sample by applying, to the transform coefficient, at least one of LFNST and MTS; and generating a reconstructed picture on the basis of the residual samples, wherein the LFNST is performed on the basis of an LFNST index indicating an LFNST kernel, the MTS is performed on the basis of an MTS index indicating an MTS kernel, and the LFNST index may be parsed before the MTS index. 1. An image decoding method performed by a decoding apparatus ,the method comprising:receiving residual information from a bitstream;deriving transform coefficients for a current block based on the residual information;deriving residual samples by applying at least one of LFNST and MTS to the transform coefficients; andgenerating a reconstructed picture based on the residual samples,wherein the LFNST is performed based on an LFNST index related to an LFNST kernel;wherein the MTS is performed based on an MTS index related to an MTS kernel; andwherein the LFNST index is parsed before the MTS index.2. The image decoding method of claim 1 , wherein the residual information includes last significant coefficient position information claim 1 , andwherein the LFNST index is parsed after the last significant coefficient position information has been parsed.3. The image decoding method of claim 1 , wherein when the current block is a luma block and the LFNST index is 0 claim 1 , the MTS index is parsed.4. The image decoding method of claim 1 , wherein when a tree type of the current block is a dual tree claim 1 , the LFNST index for each of a luma block and a chroma block is parsed.5. The image decoding method of claim 2 , wherein the deriving the transform coefficient comprises deriving a width and a height for a top-left region in which a last significant coefficient may exist in the current block by zero-out ...

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Номер записи: 172
28-03-2019 дата публикации

INTER PREDICTION MODE-BASED IMAGE PROCESSING METHOD AND DEVICE THEREFOR

Номер: US20190098299A1
Автор: Lim Jaehyun, NAM Junghak, Park Naeri
Принадлежит:

The present invention discloses an inter prediction mode-based image processing method and an apparatus therefore. Specifically, a method for processing an image based on an inter prediction may include: deriving motion information of a first prediction unit determined by a first partitioning mode of a current block and motion information of a second prediction unit determined by a second partitioning mode of the current block; generating a prediction block of the first prediction unit by using the motion information of the first prediction unit and generating a prediction block of the second prediction unit by using the motion information of the second prediction unit; and generating a prediction block of the current block in units of sub-prediction unit determined by combining the first prediction unit and the second prediction unit by using the first prediction block and the second prediction block. 1. A method for processing an image based on an inter prediction , the method comprising:deriving motion information of a first prediction unit partitioned from a current block by a first partitioning mode and motion information of a second prediction unit partitioned from the current block by a second partitioning mode;generating a first prediction block of the first prediction unit by referring to a reference picture of reference picture list 0 based on the motion information of the first prediction unit and generating a second prediction block of the second prediction unit by referring to the reference picture of reference picture list 1 based on the motion information of the second prediction unit; andgenerating a prediction block of the current block in units of sub-prediction unit determined by combining the first prediction unit and the second prediction unit by using the first prediction block and the second prediction block.2. The method of claim 1 , wherein a prediction block of the sub-prediction unit is generated by averaging or weighting a portion ...

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Номер записи: 173
12-05-2022 дата публикации

METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

Номер: US20220150535A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value. 112-. (canceled)13. A method for decoding a bitstream for a video signal by a decoding apparatus , the method comprising:constructing a motion vector candidate group for a current block, wherein the motion vector candidate group includes a motion vector of a neighboring block based on that the current block refers to a first reference picture in a first reference picture list, the neighboring block of the current block refers to a second reference picture in a second reference picture list different from the first reference picture list, and a picture order count (POC) value of the first reference picture is same as a POC value of the second reference picture;determining a motion vector predictor of the current block based on the constructed motion vector candidate group;obtaining a motion vector of the current block based on the determined motion vector predictor; anddecoding the current block based on the obtained motion vector.14. A method for encoding a bitstream for a video signal by an encoding apparatus , ...

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Номер записи: 174
12-04-2018 дата публикации

METHOD FOR ENCODING AND DECODING IMAGE AND DEVICE USING SAME

Номер: US20180103265A1
Автор: Choi Younghee, CHUNG Taeil, Jeon Byeongmoon, Jeon Yongjoon, Kim Jingyeong, Kim Jungsun, KIM SangChul, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The method for deriving a temporal motion vector predictor according to the present invention comprises the steps of: selecting a reference picture for a current block; deciding a predictor block corresponding to a predetermined storage unit block, as a reference prediction unit for the current block, in the reference picture; and deriving the temporal motion vector predictor from motion information of the decided reference prediction unit. The present invention enhances image compression efficiency. 110-. (canceled)11. A method of video decoding by a decoding apparatus , the method comprising:deriving a spatial motion vector predictor candidate for the current block based on a spatial neighboring block of a current block in a current picture;deriving a temporal motion vector predictor candidate for the current block;deriving a motion vector of the current block based on the spatial motion vector predictor candidate and the temporal motion vector predictor candidate;deriving a predicted pixel of the current block based on the motion vector of the current block; andgenerating a reconstructed picture based on the predicted pixel,wherein deriving the temporal motion vector predictor candidate comprises:determining a reference prediction unit (colPu) which is a prediction block encompassing a modified location (x, y); andderiving the temporal motion vector predictor candidate based on motion information of the colPu in a reference picture,wherein the modified location is specified by a position ((xPCtr>>4)<<4, (yPCtr>>4)<<4), wherein a position (xPCtr, yPCtr) is a position of a pixel located at the bottom right side among four central pixels of a co-located block, and wherein the co-located block is a block with a same position and a same size as the current block and is located in the reference picture.12. The method of claim 11 , wherein the position (xPCtr claim 11 , yPCtr) is specified by xPCtr=xP+(nPSW>>1) claim 11 , yPCtr=yP+(nPSH>>1) claim 11 , a position (xP ...

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Номер записи: 175
13-04-2017 дата публикации

METHOD FOR ENCODING AND DECODING VIDEO, AND APPARATUS USING SAME

Номер: US20170105021A1
Автор: Choi Younghee, Jeon Byeongmoon, Jeon Yongjoon, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Seungwook, Sung Jaewon
Принадлежит:

The present invention relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present invention comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected candidate. 110-. (canceled)11. A method of decoding video information , by a decoding apparatus , the method comprising:receiving inter prediction mode information for a current block;determining a merge mode is applied for the current block based on the inter prediction mode information;deriving candidate blocks for the merge mode from neighboring blocks of the current block;selecting one of the candidate blocks to derive motion information of the current block; andderiving the motion information of the current block based on the selected candidate block,wherein the candidate blocks for the merge mode include a first neighboring block located in a left side of the current block, a second neighboring block located in an upper side of the current block, and corner neighboring blocks of the current block.12. The method of claim 11 , wherein the candidate blocks for the merge mode are located in the in same regions in which candidate blocks for a motion vector prediction (MVP) mode ...

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Номер записи: 176
26-03-2020 дата публикации

METHOD AND DEVICE FOR ENTROPY CODING/DECODING

Номер: US20200099932A1
Автор: Hendry Hendry, Jeon Byeongmoon, Jeon Yongjoon, Kim Chulkeun, Kim Jungsun, Lim Jaehyun, Park Joonyoung, Park Naeri, Park Seungwook
Принадлежит:

The present invention relates to an entropy decoding method which includes: generating context related to a bin that forms a codeword of a syntax element; and performing arithmetic decoding of the bin based on the context. 21. An entropy decoding method , by a video decoding apparatus , comprising:receiving a bitstream including split flag information for a current coding block and a bin constituting a codeword of a syntax element cbf_luma;deriving a current luma transform block from the current coding block based on the split flag information;deriving context information on the bin constituting the codeword of the syntax element cbf_luma that specifies whether a luma residual other than 0 is present in the current luma transform block;performing an arithmetic decoding on the bin based on the derived context information; andderiving a value of the syntax element cbf_luma based on the decoded bin,wherein the step of deriving the context information includes deriving the context information based on information on a transform depth (trafoDepth) of the current luma transform block,wherein a luma residual other than 0 is not present in the current luma transform block when the derived value of the syntax element cbf_luma is 0, andwherein at least one luma residual other than 0 is present in the current luma transform block when the derived value of the syntax element cbf_luma is 1.22. The entropy decoding method according to claim 21 , wherein the context information in the step of deriving the context information on the bin is indicated by the sum of a context index offset and a context value for the bin claim 21 , andwherein the context index offset is determined depending on whether a current slice is an I slice, a P slice, or a B slice.23. The entropy decoding method according to claim 22 , wherein the value of the context index offset is 0 when the current slice is an I slice claim 22 , is 2 when the current slice is a P slice claim 22 , and is 4 when the current ...

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Номер записи: 177
02-06-2022 дата публикации

METHOD FOR ENCODING/DECODING VIDEO SIGNAL, AND APPARATUS THEREFOR

Номер: US20220174273A1
Автор: KIM Seunghwan, KOO Moonmo, Lim Jaehyun, Salhifar Mehdi
Принадлежит:

Embodiments of the disclosure provide a method and apparatus for processing a video signal. Particularly, a method for decoding a video signal according to an embodiment of the disclosure may include: determining, among predefined secondary transform sets based on intra-prediction modes of a current block, a secondary transform set applied to the current block; obtaining a first syntax element indicating a secondary transform matrix applied to the current block in the determined secondary transform set; deriving a secondary inverse-transformed block by performing a secondary inverse transform on a left top region of the current block by using the secondary transform matrix specified by the first syntax element; and deriving a residual block of the current block by performing a primary inverse transform on the secondary inverse-transformed block using a primary transform matrix of the current block. 114-. (canceled)15. A method for decoding an image , comprising:determining a secondary transform set among a pre-determined number of secondary transform sets based on an intra prediction mode of the current block;acquiring a syntax element related to a secondary transform matrix to be applied to the current block in the secondary transform set;performing a secondary inverse-transform on secondary transformed coefficients of the current block based on the secondary transform matrix specified by the syntax element to obtain primary transformed coefficients, the secondary inverse-transform being a non-separable transform;performing a primary inverse-transform on the primary transformed coefficients based on a primary transform matrix of the current block to obtain residual samples of the current block; andgenerating reconstructed samples of the current block based on the residual samples,wherein a number of input coefficients of the secondary inverse-transform and a number of output coefficients of the secondary inverse-transform are respectively determined as 8 and 16 ...

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Номер записи: 178
02-06-2022 дата публикации

Video decoding method using simplified residual data coding in video coding system, and apparatus therefor

Номер: US20220174284A1
Автор: Jaehyun LIM, Jangwon CHOI, Jin Heo, Jungah CHOI, Seunghwan Kim, Sunmi YOO
Принадлежит: LG ELECTRONICS INC

A method for performing video decoding by a decoding device according to the present document comprises the steps of: acquiring residual information of a current block; deriving residual samples of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the residual samples.

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Номер записи: 179
02-06-2022 дата публикации

METHOD AND APPARATUS FOR CODING INFORMATION ABOUT MERGE DATA

Номер: US20220174285A1
Автор: JANG Hyeongmoon, Li Ling, Lim Jaehyun, NAM Junghak, Park Naeri
Принадлежит:

A video decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: receiving a bitstream including information about merge data of a current block; checking mh intra flag information for mh intra prediction which is included in the information about the merge data; checking information about a merge triangle prediction on the basis of a checking result that a value of the mh intra flag information is related to checking the information about the merge triangle prediction included in the information about the merge data; deriving prediction samples for the current block on the basis of a result of checking the information about the merge triangle prediction; and generating a reconstructed picture on the basis of the prediction samples. 1receiving a bitsteam comprising information on merge data of a current block;deriving prediction samples for the current block based on the information on the merge data; andgenerating reconstructed samples based on the prediction samples,wherein deriving prediction samples for the current block based on the information on the merge data comprising:checking first flag information related to whether combined inter and intra prediction (CIIP) is applied to the current block, the first flag information being included in the information on the merge data;parsing information related to partitioning prediction, the partitioning prediction being a prediction performed by partitioning the current block, wherein the partitioning includes triangle partitioning; andderiving the prediction samples based on the information related to the partitioning prediction,wherein the parsing the information related to the partitioning prediction is performed based on a result of the checking of the first flag information.. An image decoding method performed by a decoding apparatus, the method comprising: This application is a continuation of U.S. application Ser. No. 17/353,137, filed on Jun. 21, 2021, which ...

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Номер записи: 180
02-06-2022 дата публикации

IMAGE DECODING METHOD FOR RESIDUAL DATA CODING IN IMAGE CODING SYSTEM, AND APPARATUS THEREFOR

Номер: US20220174324A1
Автор: CHOI Jangwon, CHOI Jungah, HEO Jin, KIM Seunghwan, Lim Jaehyun, YOO Sunmi
Принадлежит:

An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring syntax elements for a first transform coefficient through an n-th transform coefficient of a current block, wherein the syntax elements are syntax elements according to a first residual data coding structure of TSRC; and acquiring syntax elements for an n+1st transform coefficient through a last transform coefficient of the current block, wherein the syntax elements are syntax elements according to a second residual data coding structure of the TSRC, wherein the number of context-coded syntax elements for the first transform coefficient through the n-th transform coefficient is equal to the maximum number of context-coded bins of the current block, and the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient. 1. An image decoding method , performed by a decoding apparatus , the method comprising:obtaining syntax elements for a first transform coefficient to an n-th transform coefficient of a current block, wherein the syntax elements are syntax elements according to a first residual data coding structure of Transform Skip Residual Coding (TSRC);obtaining syntax elements for an n+1 th transform coefficient to a last transform coefficient of the current block, wherein the syntax elements are syntax elements according to a second residual data coding structure of the TSRC;deriving transform coefficients of the current block based on the syntax elements according to the first residual data coding structure and the syntax elements according to the second residual data coding structure;deriving residual samples of the current block based on the transform coefficients; andgenerating a reconstructed picture based on the residual samples,wherein a number of context-coded syntax elements for the first transform coefficient to the n-th transform ...

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Номер записи: 181
19-04-2018 дата публикации

Method for Intra Prediction and Device Therefor

Номер: US20180109808A1
Автор: Byeongmoon Jeon, Chulkeun Kim, Hendry Hendry, Jaehyun LIM, Joonyoung Park, Jungsun Kim, Naeri PARK, Seungwook Park, Yongjoon Jeon
Принадлежит: LG ELECTRONICS INC

A method for intra prediction comprises determining a first MPM candidate corresponding to a left-side candidate block on the basis of a position of the left-side candidate block adjacent to a left side of a current block; determining a second MPM candidate corresponding to an upper-end candidate block on the basis of a position of the upper-end candidate block adjacent to an upper end of the current block; generating an MPM candidate list including a plurality of MPM candidates, on the basis of the first MPM candidate and the second MPM candidate; and determining one MPM candidate of the plurality of the MPM candidates that constitute the MPM candidate list as an intra prediction mode of the current block, and performing intra prediction for the current block on the basis of the determined intra prediction mode to generate a prediction block corresponding to the current block.

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Номер записи: 182
11-04-2019 дата публикации

Method and apparatus for inter prediction in video coding system

Номер: US20190110061A1
Автор: Jaehyun LIM, Junghak NAM, Naeri PARK
Принадлежит: LG ELECTRONICS INC

A video decoding method performed by a decoding apparatus comprises: deriving control points (CPs) for the current block; obtaining motion vectors for the CPs; deriving a motion vector of a sub-block or a sample unit in the current block on the basis of the obtained motion vectors; deriving a prediction sample for the current block on the basis of the derived motion vector; and generating a reconstruction sample on the basis of the prediction sample. The method enables effective performance of inter prediction through the motion vectors (transformation prediction), not only when an image in the current block is moved in a plane, but also when the image in the current block is rotated, zoomed in, zoomed out, or transformed into a parallelogram. Accordingly, the amount of data for the residual signal for the current block can be eliminated or reduced, and the overall coding efficiency can be improved.

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Номер записи: 183