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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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 20503. Отображено 100.
05-01-2012 дата публикации

Method and apparatus for video processing for improved video compression

Номер: US20120002000A1
Автор: Rodolfo Vargas Guerrero
Принадлежит: Vibare Inc

Systems, apparatuses, and methods are provided for processing video. In one method, analog image information is acquired over an exposure period, and digital image information is generated from the analog image information at a frame period where the exposure period is greater than the frame period. In another method, stored characteristic information such as images of parties are compared to a received characteristic information. If there is a match, a communication link is established between the parties.

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Номер записи: 1
19-01-2012 дата публикации

System for low resolution power reduction with high resolution deblocking

Номер: US20120014447A1
Автор: Christopher A. Segall, Zhan MA
Принадлежит: Sharp Laboratories of America Inc

A system for encoding and decoding video that uses power reduction techniques.

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Номер записи: 2
02-02-2012 дата публикации

Method for image visual effect improvement of video encoding and decoding

Номер: US20120027076A1
Автор: Qian Su
Принадлежит: Shenzhen Temobi Science and Technology Co Ltd

The present invention relates to method for image visual effect improvement of video encoding and decoding. The method at an encoder comprises enhancement process of image boundary information, adaptive brightness transformation process, and adaptive enhancement process of chrominance information. The method at a decoder comprises adaptive enhancement of boundary information based on the block statistical characteristic, adaptive brightness transformation process, and adaptive enhancement process of the chrominance information. Based on characteristics of the image source at the encoder and the decoder, the present invention uses brightness space processing technology to eliminate blocking artifacts, enhance high frequency information and improve brightness information distribution, so as to improve brightness information of the image in one aspect, and uses the chroma space processing technology to enhance color effect of the image in the other aspect, and finally, the objective of improving visual effect of the image is achieved.

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Номер записи: 3
02-02-2012 дата публикации

Adaptive Interpolation Filters for Multi-Layered Video Delivery

Номер: US20120027079A1
Автор: Alexandros Tourapis, Peshala V. Pahalawatta, YAN Ye
Принадлежит: Dolby Laboratories Licensing Corp

Adaptive interpolation filters for multi-layered video delivery are described. Combinations of such adaptive filters with other pre-processing steps in the context of frame or 2D compatible 3D and 2D scalable video delivery system are also addressed.

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Номер записи: 4
09-02-2012 дата публикации

Decoding of a digital signal comprising at least one sample

Номер: US20120033741A1
Автор: Eric Nassor, Herve Le Floch, Nael Ouedraogo
Принадлежит: Canon Inc

The invention concerns the decoding of a digital signal comprising at least one encoded digital image, a digital image being represented by a plurality of samples. The decoding method comprises, when a part of one said encoded digital image to be decoded is missing, applying a first decoding to the encoded digital image having the missing part so as to obtain a first decoded image, the first decoding involving setting a missing sample, being one of said samples in said missing part, to a first value. A second decoding is applied to said first decoded image using additional data, derived by the encoder from at least part of the encoded digital image and usable during decoding to correct the encoded digital image, to obtain a partially corrected symbol representative of said sample, said partially corrected symbol comprising at least one unknown bit. Finally, a second value for said missing sample is obtained based upon said first value and said partially corrected symbol. Thanks to this method, even a partial correction using additional data can be used to improve the values of missing samples of a digital image at the decoder side. As a result, the quality of reconstruction of missing parts of an image can be improved.

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Номер записи: 5
23-02-2012 дата публикации

Entropy coder supporting selective employment of syntax and context adaptation

Номер: US20120044987A1
Автор: James D. Bennett
Принадлежит: Broadcom Corp

Entropy coder supporting selective employment of syntax and context adaptation. In video coding, different entropy coding is selectively and adaptively employed based on local and/or remote consideration(s). For example, certain entropy coding may be context adaptive while other entropy coding may be non-context adaptive, and may operate in accordance with syntax or without syntax. Selective adaptation between context adaptive entropy coding and non-context adaptive entropy coding, as well as those which operate using syntax or without syntax may be made based on one or more local and/or remote characteristic(s). Transitioning between the various end to end configurations midstream can occur upon reference frame transitions with appropriate header information leadoff in a given bitstream. A given device (e.g., encoder or transcoder) may be implemented to transition independently, in cooperation with, or under the direction/coordination with one or more other devices within the communication system.

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Номер записи: 6
23-02-2012 дата публикации

Techniques for identifying block artifacts

Номер: US20120044989A1
Автор: Jorge E. Caviedes, Nilesh A. Ahuja
Принадлежит: Intel Corp

Techniques are described that can be used to identify blocking artifacts in both vertical and horizontal directions. For blocking artifacts in a vertical direction, a horizontal gradient is determined for a pixel. Gradient smoothing is performed for pixels in the row of the pixel. A ratio of the horizontal gradient over the gradient smoothing is determined. Any pixel with a ratio above a threshold and in a segment with a length that exceeds a threshold length as potentially having block artifacts. Each column with pixels that potentially have block artifacts is inspected to determine whether a number of block artifacts in the column are a local maximum and whether there is a sufficient number of blocking artifacts in the column. Columns that satisfy both conditions are considered to include blocking artifacts. To determine blocking artifacts in the horizontal direction, a similar technique is used as described with regard to vertical direction except row and columns are reversed.

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Номер записи: 7
23-02-2012 дата публикации

Low complexity adaptive filter

Номер: US20120044992A1
Автор: In Suk Chong, Marta Karczewicz, Wei-Jung Chien
Принадлежит: Qualcomm Inc

An interim filter determined for a previous series of video blocks can be applied to a current series of video blocks to determine an interim filter map for the current series of video blocks. Based on the interim filter map, a decoding filter can be determined. By applying the decoding filter to the current series of video blocks, a decoding filtering map can be determined. Based on CUs identified as having filtering off by the decoding filtering map, an interim filter for the current series of video blocks can be determined. The decoding filter and decoding filtering map can be transmitted to a decoder, while the interim filter and interim filter map may not be transmitted to a decoder. The interim filter for the current series of video blocks can be used to generate an interim filter map for a next series of video blocks.

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Номер записи: 8
23-02-2012 дата публикации

Interpolation of video compression frames

Номер: US20120044995A1
Автор: Gary A. Demos
Принадлежит: Dolby Laboratories Licensing Corp

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

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Номер записи: 9
01-03-2012 дата публикации

Video processing device and video processing method

Номер: US20120051433A1
Автор: Hiroshi Amano, Kotaro Esaki, Masayasu Iguchi, Mikiko Roji
Принадлежит: Panasonic Corp

While temporal and spatial direct modes are both supported, the amount of temporarily-stored direct-mode prediction information is reduced, thereby reducing the memory bus bandwidth. A motion information generator combines a motion vector for an anchor block with the number of a reference picture of the anchor block, thereby generates motion information of the pixel block. A still-state determination unit determines whether or not the pixel block is considered still based on the motion vector for the anchor block and on the number of the reference picture. A selector selectively stores in a memory either an output of the motion information generator or a determination result of the still-state determination unit as direct-mode prediction information of the pixel block. A motion vector predictor predicts a motion vector for the pixel block in direct mode based on the direct-mode prediction information stored in the memory.

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Номер записи: 10
01-03-2012 дата публикации

Video Processor Configured to Correct Field Placement Errors in a Video Signal

Номер: US20120051442A1
Автор: Diego P. DeGarrido, Sarah J. Cristarella, Timothy J. Purkey
Принадлежит: LSI Corp

A video processor or other processing device incorporates functionality for correcting field placement errors in a video signal. The device obtains at least a portion of a current frame of a video signal, and compares a designated field of an adjacent frame of the video signal with a designated field of the current frame. If the designated field of the adjacent frame and the designated field of the current frame are of the same polarity, the device adjusts a field display configuration value of the current frame, and the current frame is displayed in accordance with the adjusted field display configuration value. However, if the designated field of the adjacent frame and the designated field of the current frame are of different polarities, the current frame is displayed without adjusting the field display configuration value. This process is repeated for each of one or more additional frames of the video signal. The device may comprise, for example, a video processor integrated circuit implemented in a digital video player.

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Номер записи: 11
08-03-2012 дата публикации

Methods for Transmitting and Receiving Data Contents, Corresponding Source and Destination Nodes and Storage Means

Номер: US20120059948A1
Автор: Alain Caillerie, Lionel Tocze, Yacine El Kolli
Принадлежит: Canon Inc

A method is proposed for transmitting at least two data contents by means of a source node to a destination node via at least two transmission paths. The method for transmitting includes steps of: sub-dividing each content into a succession of elementary data groups according to a predetermined pattern of repetition comprising at least two types of different elementary groups; transmitting elementary groups on at least one of the paths, according to a predefined alternation of elementary groups resulting from the sub-division of at least two different contents.

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Номер записи: 12
15-03-2012 дата публикации

Methods and Systems for Estimation of Compression Noise

Номер: US20120063694A1
Автор: Christopher A. Segall
Принадлежит: Individual

Aspects of the present invention are related to systems and methods for determining the compression noise present in an image or frame in a video sequence.

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Номер записи: 13
05-04-2012 дата публикации

Method and Apparatus of Adaptive Loop Filtering

Номер: US20120082241A1
Автор: Chia-Yang Tsai, Chih-Ming Fu, Ching-Yeh Chen, Shaw-Min Lei, Yu-Wen Huang
Принадлежит: MediaTek Inc

A method and apparatus for processing in-loop reconstructed video using an in-loop filter is disclosed. In the recent HEVC development, adaptive loop filtering (ALF) is being adopted to process in-loop reconstruction video data, where ALF can be selectively turned ON or OFF for each block in a frame or a slice. An advanced ALF is disclosed later that allows a choice of multiple filter sets that can be applied to the reconstructed video data adaptively. In the present disclosure, pixels of the in-loop reconstructed video data are divided into a plurality of to-be-filtered regions, and an in-loop filter from a filter set is determined for each to-be-filtered region based on a rate-distortion optimization procedure. According to one embodiment of the present invention, computation of cost function associated with the rate-distortion optimization procedure is related to correlation values associated with original video data and the in-loop reconstructed video data. Furthermore, the correlation values can be shared by the multiple candidate filters during the rate-distortion optimization procedure for said each to-be-filtered region. In another embodiment, the correlation values can be shared by multiple candidate to-be-filtered regions of an area of the in-loop reconstructed video data during the rate-distortion optimization procedure for the area of the in-loop reconstructed video data.

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Номер записи: 14
05-04-2012 дата публикации

Method and apparatus for compressed sensing

Номер: US20120082344A1
Автор: David Leigh Donoho
Принадлежит: David Leigh Donoho

Method and apparatus for compressed sensing yields acceptable quality reconstructions of an object from reduced numbers of measurements. A component x of a signal or image is represented as a vector having m entries. Measurements y, comprising a vector with n entries, where n is less than m, are made. An approximate reconstruction of the m-vector x is made from y. Special measurement matrices allow measurements y=Ax+z, where y is the measured m-vector, x the desired n-vector and z an m-vector representing noise. “A” is an n by m matrix, i.e. an array with fewer rows than columns. “A” enables delivery of an approximate reconstruction, x # ′ of x. An embodiment discloses approximate reconstruction of x from the reduced-dimensionality measurement y. Given y, and the matrix A, approximate reconstruction x # of x is possible. This embodiment is driven by the goal of promoting the approximate sparsity of x # .

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Номер записи: 15
12-04-2012 дата публикации

Apparatus and method for applying unequal error protection during wireless video transmission

Номер: US20120087407A1
Автор: Meir Feder, Shay Freundlich, Zvi Reznic
Принадлежит: AMIMON LTD

A method for wireless transmission of video including component data bytes representing components of a video block includes applying transmission bit coding adapted to provide relatively greater error protection to wireless transmission bits of a wireless transmission frame corresponding to bits of the component data byte which are more visually significant than to those transmission bits of the transmission frame corresponding to bits of the component data byte which are less visually significant.

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Номер записи: 16
19-04-2012 дата публикации

Method and Apparatus for Processing Video Signals

Номер: US20120093217A1
Автор: Byeong Moon Jeon, Joon Young Park, Jung Sun Kim, Seung Wook Park, Seung-Jin Baek, Seung-won Jung, Sung Jea Ko, Young Hee Choi
Принадлежит: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, LG ELECTRONICS INC

The present invention relates to a method and apparatus for processing video signals, the method comprising: decoding a current frame of a video signal in block units to generate a restored frame, and acquiring first and second flags to acquire a filter coefficient which is adaptively determined from the video signal for each slice on the basis of flag information, or performing deblocking filtering with a predetermined filter coefficient. The present invention relates to a video signal processing method which includes an inter-frame prediction method that determines a motion vector, and a method for performing inter-frame prediction for a residual image. The method for processing video signals can increase the compression encoding efficiency by performing accurate motion prediction and residual image prediction, and can improve the quality of a restored image by removing distortion and performing a filtering for restoring an image that is close to the original image.

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Номер записи: 17
19-04-2012 дата публикации

Deblocking filter

Номер: US20120093236A1
Автор: Gisle Bjøntegaard
Принадлежит: Cisco Technology Inc

The invention is related to decoding of block wise coded video pictures. The determination of using de-blocking filtering between coded blocks is based on alternative characteristics compared to the characteristics used in H.264/AVC.

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Номер записи: 18
03-05-2012 дата публикации

Method and Apparatus of Slice Boundary Filtering for High Efficiency Video Coding

Номер: US20120106624A1
Автор: Chih-Ming Fu, Chih-Wei Hsu, Ching-Yeh Chen, Shan Liu, Shaw-Min Lei, Yu-Wen Huang
Принадлежит: MediaTek Inc

An apparatus and method for video coding having intra-slice deblocking, intra-slice adaptive loop filter, and intra-slice adaptive offset are disclosed. In a video coding system, a picture is often divided into slices and each slice is independently processed so that errors or missing data from one slice cannot propagate to any other slice within the picture. In the recent high efficiency video coding (HEVC) development, deblock filtering (DF), adaptive loop filter (ALF) and adaptive offset (AO) may be applied to reconstructed slices. When the processing is applied across slice boundaries, it may rely on pixels outside the current slice and cause dependency of the current slice on other slice(s). Consequently, the DF/ALF/AO processing on a reconstructed slice may have to wait until the reconstructed slices that it is dependent from complete the DF/ALF/AO processing. To overcome the slice boundary issue, intra-slice DF/ALF/AO is developed that does not rely on any pixel outside the currently slice. An optional slice boundary filter may be applied to slice boundaries after all slices are processed by the intra-slice DF/ALF/AO.

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Номер записи: 19
17-05-2012 дата публикации

Image processing device and method

Номер: US20120121188A1
Автор: Kondo Kenji
Принадлежит: Sony Corp

The present invention relates to an image processing device and method whereby deterioration of effects of filter processing due to local control of filter processing when encoding or decoding can be suppressed. A boundary control flag generating unit 132 of a control information generating unit 112 generates boundary control flags based on system specification information which a system specification managing unit 141 manages. A control unit 171 of a adaptive filter processing unit 113 determines a processing method for filter processing to be performed as to pixels nearby a slice boundary following the value of the boundary control flag. For example, selection is made to perform filter processing straddling slices or to perform filter processing closed at the present slice. The present invention can be applied to an image processing device, for example.

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Номер записи: 20
07-06-2012 дата публикации

Apparatus and method for indicating a packet error in an audio and video communication system

Номер: US20120144265A1
Автор: Hak-Ju Lee, Jin-Hee Jeong, Se-Ho Myung, Sung-hee Hwang
Принадлежит: SAMSUNG ELECTRONICS CO LTD

An apparatus and method are provided for indicating an error of a transport packet in an audio and video communication system. The method includes receiving a frame including a transport packet, attempting Forward Error Correction (FEC) on the frame, and setting a value of an error indicating field in the transport packet according to a result of the FEC. The error indicating field includes at least one of a first flag indicating a presence or absence of an error in the transport packet, a second flag indicating a success or failure of the FEC, and a third flag indicating detection or non-detection of a Cyclic Redundancy Check (CRC).

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Номер записи: 21
14-06-2012 дата публикации

Image encoding method and device, and decoding method and device therefor

Номер: US20120147957A1
Автор: Alexander Alshin, Elena Alshina, Maxim Koroteev, Nikolay Shlyakhov, Vadim Seregin
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency.

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Номер записи: 22
14-06-2012 дата публикации

Method and apparatus for encoding/decoding motion vector

Номер: US20120147966A1
Автор: Kyo-Hyuk Lee, Tammy Lee, Woo-Jin Han
Принадлежит: SAMSUNG ELECTRONICS CO LTD

Provided are methods and apparatuses for encoding and decoding a motion vector. The method of encoding the motion vector includes: selecting, as a mode of encoding information about a motion vector predictor of the current block, a first mode in which information indicating the motion vector predictor from among at least one motion vector predictor is encoded or a second mode in which information indicating generation of the motion vector predictor based on blocks or pixels included in a previously encoded area adjacent to the current block is encoded; determining the motion vector predictor of the current block according to the selected mode and encoding the information about the motion vector predictor of the current block; and encoding a difference vector between the motion vector of the current block and the motion vector predictor of the current block.

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Номер записи: 23
12-07-2012 дата публикации

Identification of samples in a transition zone

Номер: US20120177120A1
Автор: Liwei Guo, Marta Karczewicz, Peisong Chen
Принадлежит: Qualcomm Inc

During a video encoding or decoding process, a predicted prediction block is generated for a CU. The CU may have two or more prediction units (PUs). A computing device selects a neighbor region size. After the computing device selects the neighbor region size, samples in a transition zone of the prediction block are identified. Samples associated with a first PU are in the transition zone if neighbor regions that contain the samples also contain samples associated with a second PU. Samples associated with the second PU may be in the transition zone if neighbor regions that contain the samples also contain samples associated with the first PU. The neighbor regions have the selected neighbor region size. A smoothing operation is then performed on the samples in the transition zone.

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Номер записи: 24
19-07-2012 дата публикации

Parametric loop filter

Номер: US20120183050A1
Автор: Ehsan Maani, Lina Dong, WEI Liu
Принадлежит: Sony Corp

A parametric loop filter uses a set of fixed filters to remove or reduce noise and artifacts introduced during video coding. The filters are pre-trained offline and hardwired into encoder and decoder, instead of online trained Wiener filters. The filters are able to be specified using one or more parameters including: direction, bandwidth along the direction (bw // ) and bandwidth perpendicular to the direction (bw ⊥ ). The filter to be used is able to be derived from local image characteristics or predicted from neighboring blocks. The parametric loop filter utilizes much less computation, delay and memory access at the encoder. Fixed coefficients allow fast implementation of filtering at the decoder. A parametric loop filter is able to be combined with online training to further improve performance, by allowing one or more fixed filters to be replaced with online trained Wiener filters.

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Номер записи: 25
19-07-2012 дата публикации

Temporal Prediction Structure Aware Temporal Filter

Номер: US20120183055A1
Автор: Danny Hong, Michael Horowitz, Stephan Wenger, Wonkap Jang
Принадлежит: Vidyo Inc

Disclosed are a system, method, apparatus, and computer readable media containing instructions for pre-filtering one or more pictures of a prediction structure. In an exemplary embodiment, a system includes an input for receiving the one or more pictures and a pre-filter, operatively coupled to the input and receiving the one or more pictures. The pre-filter can include a prediction position determining module for determining a position of at least one picture in the prediction structure, a context memory for storing determined position information, and a filter module for selecting a filter context based on the determined position and using the selected filter context to filter the at least one picture.

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Номер записи: 26
02-08-2012 дата публикации

Adaptive loop filtering using tables of filter sets for video coding

Номер: US20120195367A1
Автор: Faouzi Kossentini, Hassen Guermazi, Michael Horowitz, Mohamed Ali Ben AYED, Nader Mahdi
Принадлежит: eBrisk Video Inc

Disclosed are adaptive loop filtering techniques for video encoding and/or decoding. For a video unit, the encoder selects a set of predefined filters or generates a set of new filters, and places into the bitstream information identifying the set of predefined filters, or information defining the set of new filters. The set of filters may be used for loop filtering of at least one of the reconstructed samples of the video unit. At the decoder, a set of filters may be obtained by, decoding an index that identifies a set of predefined filters, or by decoding information related to a set of new filters. The obtained set of filters may be used for loop filtering of at least one decoded and reconstructed sample of the video unit.

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Номер записи: 27
09-08-2012 дата публикации

Recording medium having recorded thereon coded information using plus and/or minus rounding of images

Номер: US20120201302A1
Автор: Yuichiro Nakaya
Принадлежит: Individual

A method of decoding images including the steps of: extracting motion vector information from input information to be decoded; synthesizing a prediction image by performing motion compensation using the motion vector information and a reference image which is a previously decoded image; and synthesizing a decoded image by adding the prediction image to an error image, wherein the motion compensation includes specifying either a positive rounding method or a negative rounding method for interpolating intensity values of pixels in performing the motion compensation.

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Номер записи: 28
23-08-2012 дата публикации

Multi-metric filtering

Номер: US20120213271A1
Автор: In Suk Chong, Marta Karczewicz
Принадлежит: Qualcomm Inc

An encoder can generate a series of codewords to signal to a decoder a mapping of range combinations for two or more metrics. The encoder can generate a first codeword to indicate a current combination being decoded maps to the same filter as the most recently decoded combination that shares the same range for the first metric. The encoder can generate a second codeword to indicate that the current combination maps to the same filter as the most recently decoded combination that shares the same range for the second metric. If the current combination does not map to the same filter as either of these most recently decoded combinations, then the encoder can generate a third codeword that indicates the filter that maps to the current combination.

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Номер записи: 29
23-08-2012 дата публикации

Multi-metric filtering

Номер: US20120213292A1
Автор: In Suk Chong, Marta Karczewicz
Принадлежит: Qualcomm Inc

A filter unit determines a mapping of range combinations to filters. Each range combination includes a range for a first metric and a range for a second metric. The filter unit determines a unique range combination identification (ID) for each range combination, with each unique range combination ID corresponding to a sequential value. The filter unit assigns a unique group ID to each group of range combinations. A group of range combinations includes range combinations mapped to the same filter, and the unique group IDs correspond to a set of sequential values. The filter unit signals or reconstructs coefficients for the filters in an order based on the sequential values of the group IDs.

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Номер записи: 30
20-09-2012 дата публикации

Filtering method for removing block artifacts and/or ringing noise and apparatus therefor

Номер: US20120236948A1
Автор: Jeong-Hoon Park, Yong-Je Kim, Yung-Lyul Lee
Принадлежит: SAMSUNG ELECTRONICS CO LTD

Provided are a filtering method and apparatus for removing blocking artifacts and ringing noise. The filtering method includes transforming video data on a block-by-block basis, and detecting the presence of an edge region in the video data by checking the distribution of values obtained by the transformation. Accordingly, it is possible to completely remove blocking artifacts and/or ringing noise by more effectively detecting the presence of an edge region in video data.

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Номер записи: 31
04-10-2012 дата публикации

Image processing apparatus and method as well as program

Номер: US20120250771A1
Автор: Kenji Kondo
Принадлежит: Sony Corp

An image processing apparatus and method that can be applied to an image encoding apparatus that carries out encoding in accordance with, for example, a H.264/AVC method. A high-symmetry interpolation filter of variable filter coefficients has a number of pixels, to which symmetry determined in advance is applied, greater than that of a low-symmetry interpolation filter. The high-symmetry interpolation filter carries out a filter process for a reference image from a frame memory using filter coefficients calculated by a high-symmetry filter coefficient calculation portion and outputs the reference image after the variable filter process to a selector. The selector selects, when a slice of a processing object is a B slice, the reference image after the variable filter from the high-symmetry interpolation filter and outputs the selected image to a motion prediction second and a motion compensation portion under control of a control part.

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Номер записи: 32
11-10-2012 дата публикации

Order of deblocking

Номер: US20120257702A1
Автор: Hisao Sasai, Matthias Narroschke
Принадлежит: Panasonic Corp

The present invention relates to block-based video coding, in particular to methods for removing blocking artifacts in reconstructed video images. In conventional block-based video coding, both decoding and deblocking are performed on a block-by-block basis, which results in a plurality of dependencies between the various steps and processes. According to the present invention, deblocking is performed in batch mode after an entire frame has been decoded. Moreover, vertical and horizontal deblocking are separated in the sense that deblocking in the one direction is only performed after deblocking in the other direction is completed for the entire frame. In this manner, the decoding and deblocking processing can be split into a plurality of concurrent processes, which results in a highly efficient implementation both in hardware and in software.

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Номер записи: 33
25-10-2012 дата публикации

Method and device for calculating blur in video images

Номер: US20120268652A1
Автор: Debing Liu, Xaiodong Gu, Xu Feng, Zhibo Chen
Принадлежит: Thomson Licensing LLC

Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.

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Номер записи: 34
08-11-2012 дата публикации

Methods and apparatus for adaptive coupled pre-processing and post-processing filters for video encoding and decoding

Номер: US20120281753A1
Автор: Joel Sole, Kiran Misra, PENG Yin, QIAN Xu, Xiaoan Lu, Yunfei Zheng
Принадлежит: Thomson Licensing SAS

Methods and apparatus are provided for adaptive coupled pre-processing and post-processing filters for video encoding and decoding. The apparatus and method encode input data for a picture into a resultant bitstream, wherein said video encoder comprises a pre-filter and a post-filter coupled to the pre-filter, wherein said pre-filter filters the input data for the picture and the post-filter filters in-loop reconstructed data for the picture.

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Номер записи: 35
15-11-2012 дата публикации

Error concealment for frame loss in multiple description coding

Номер: US20120288014A1
Автор: Mengyao Ma, Oscar Chi Lim Au
Принадлежит: Kiu Sha Management LLC

Systems and methodologies for concealing frame loss in a video transmission environment are provided herein. Multiple Description Coding (MDC) can be used as an Error Resilience technique for video coding. In case of transmission errors, Error Concealment can be combined with MDC to reconstruct a lost frame, such that the propagated error to following frames can be reduced. Further, multi-hypothesis decoding can be employed to enhance reconstructed video quality of MDC over packet loss networks. For instance, one or more frames after the lost frame in the same stream can be reconstructed using multi-hypothesis decoding, which combines directly decoding and temporally interpolating these frames. Moreover, output obtained from directly decoding and temporally interpolating each frame can be combined by generating a weighted sum of these hypotheses. Constant weights and/or adaptive weights (e.g., determined based on the minimum mean square error criterion) can be used for yielding the weighted sum.

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Номер записи: 36
22-11-2012 дата публикации

Methods, Apparatuses and Computer Programs for Video Coding

Номер: US20120294357A1
Автор: Jani Lainema, Kemal Ugur
Принадлежит: Nokia Oyj

There is disclosed apparatuses, methods and computer programs for video coding. The filtering process to be applied to intra predicted sample values is selected and adapted based on the characteristics of the sample prediction process. According to some embodiments an angularity information and pixel values for filtering by a filter are received. The angularity information is used to adapt the filter. The adapting may comprise selecting a filter algorithm and/or filter coefficients. The selected pixels are then filtered by the adapted filter.

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Номер записи: 37
29-11-2012 дата публикации

Low resolution intra prediction

Номер: US20120300838A1
Автор: Christopher A. Segall, Zhan MA
Принадлежит: Sharp Laboratories of America Inc

A video decoder decodes video from a bit-stream including a low resolution predictor that predicts pixel values based upon both a low resolution reference image and an interpolated high resolution reference image at positions different from the low resolution reference image using low resolution motion data. A high resolution predictor predicts pixel values using a non-interpolated high resolution reference image at positions different from the low resolution reference image using the low resolution motion data, wherein the non-interpolated high resolution reference image and the interpolated high resolution reference image are co-sited.

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Номер записи: 38
13-12-2012 дата публикации

Optical flow based motion vector estimation systems and methods

Номер: US20120314772A1
Автор: Xuemin Chen
Принадлежит: Broadcom Corp

Certain aspects of a method and system for optical flow based motion vector estimation for picture rate up-conversion (PRUC) may include generating one or more motion vectors based on extracted picture rate up-conversion (PRUC) data by minimizing a cost function. The cost function may be constrained by any combination of a block matching constraint, a smoothness constraint and a bias constraint. The PRUC data may be extracted from a compressed video data stream while the compressed video data stream is being decompressed by a video decompression engine. The PRUC data may comprise local block motion vectors, block coding modes, quantization levels, quantized residual data and decoded pictures. A plurality of interpolated pictures may be generated based on extracting the PRUC data.

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Номер записи: 39
03-01-2013 дата публикации

System for initializing an arithmetic coder

Номер: US20130003829A1
Автор: Christopher A. Segall, Kiran Misra
Принадлежит: Sharp Laboratories of America Inc

Decoding an entropy slice using a context based adaptively binary arithmetic coding, based upon a pair of variables n and m, corresponding to a probability state index and the value of the most probable symbol.

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Номер записи: 40
17-01-2013 дата публикации

Apparatus of generating prediction block

Номер: US20130016773A1
Автор: Soo-Mi Oh
Принадлежит: Individual

Provided is an intra prediction decoding apparatus that restores quantized residual coefficients, intra prediction information and size information on a prediction unit from a received bit stream, restores an intra prediction mode of the current prediction unit on the basis of the intra prediction information and the size information on the current prediction unit, generates unavailable reference pixels of the prediction unit, and adaptively filters the reference pixels on the basis of the intra prediction mode. Also, the apparatus generates a prediction block by adaptively filtering reference pixels corresponding to the intra prediction mode. Then, the apparatus generates a restoration image using the prediction block and a restored residual block. Accordingly, a prediction block close to an original image can be restored, and an image compression ratio can be improved.

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Номер записи: 41
31-01-2013 дата публикации

Moving image prediction encoder, moving image prediction decoder, moving image prediction encoding method, and moving image prediction decoding method

Номер: US20130028322A1
Автор: Akira Fujibayashi, Choong Seng Boon, Sandeep Kanumuri, Thiow Keng Tan
Принадлежит: NTT DOCOMO INC

An object is to improve the quality of a reproduced picture and improve the efficiency of predicting a picture using the reproduced picture as a reference picture. For this object, a video prediction encoder 1 comprises an input terminal 101 which receives a plurality of pictures in a video sequence; an encoder which encodes an input picture by intra-frame prediction or inter-frame prediction to generate compressed data and encodes parameters for luminance compensation prediction between blocks in the picture: a restoration device which decodes the compressed data to restore a reproduced picture: a filtering processor 113 which determines a filtering strength and a target region to be filtered, using the parameters for luminance compensation prediction between the blocks and performs filtering on the reproduced picture, according to the filtering strength and the target region to be filtered; and a frame memory 104 which stores the filtered reproduced picture, as a reference picture.

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Номер записи: 42
07-02-2013 дата публикации

Apparatus for intra predicting a block, apparatus for reconstructing a block of a picture, apparatus for reconstructing a block of a picture by intra prediction

Номер: US20130034158A1
Автор: Detlev Marpe, Heiner Kirchhoffer
Принадлежит: Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV

An apparatus for intra predicting a block to be predicted of a picture from neighboring image samples sequentially extending along two rays starting at a common intersection point and pointing into different directions, the neighboring image samples including edge neighboring samples bordering the block to be predicted, includes a smoothing filter and a determiner. The smoothing filter is configured to one-dimensionally filter the neighboring image samples, which are sequentially arranged into a sequence by anti-parallelly traveling along a first one of the two rays and parallelly traveling along a second one of the two rays to obtain a filtered image sample sequence. The determiner is configured to determine a prediction value for a predetermined image sample of the block to be predicted by using the filtered image sample sequence.

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Номер записи: 43
07-02-2013 дата публикации

Image coding method and image decoding method

Номер: US20130034165A1
Автор: Hisao Sasai, Takahiro Nishi, Youji Shibahara
Принадлежит: Panasonic Corp

An image coding method for coding an input image per block to generate a coded image signal includes: predicting for each prediction unit which is an area obtained by partitioning a target block to generate a prediction image of the target block; comparing a transform unit which is an area obtained by partitioning the target block and is a processing unit for frequency transform with the prediction unit, to detect part of a boundary of the prediction unit, the boundary being located within the transform unit; performing boundary filtering on the detected part of the boundary in the generated prediction image; calculating a difference between a filtered prediction image and the input image to generate a difference image of the target block; and performing frequency transform on the difference image for each transform unit.

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Номер записи: 44
14-02-2013 дата публикации

Method of processing an image

Номер: US20130039420A1
Автор: Debing Liu, Feng Xu, Xiaodong Gu, Zhibo Chen
Принадлежит: Thomson Licensing SAS

The invention relates to a method for processing an image divided into blocks of pixels comprising the steps of: detecting, for each block, a largest sub-block whose pixels have an equal luminance value; identifying, for each block, if the detected largest sub-block is or is not a natural texture; calculating, for each block, a weighted luminance difference between the detected largest sub-block and neighboring pixels; determining, for each block, a block blockiness level on the basis of the number of pixels within the detected largest sub-block, of said identification step and of said weighted luminance difference; and processing the image on the basis of the block blockiness levels.

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Номер записи: 45
14-02-2013 дата публикации

System and method for masking visual compression artifacts in decoded video streams

Номер: US20130039432A1
Автор: Haitao Guo, Sally Fung, Timothy J. Millet
Принадлежит: Apple Inc

A technique is provided for processing decoded video data to mask visual compression artifacts resulting from video compression. In accordance with this technique, a hardware block is provided for generating and adding random noise to the decoded video stream. In one embodiment, a random number is generated for each pixel of the decoded video data and compared against one or more threshold values to determine a threshold range. In such an embodiment, a noise addend value is selected based upon the threshold comparison and summed with the current pixel. While the present technique may not eliminate the compression artifacts, the addition of random noise renders the compression artifacts less noticeable to the human eye and, therefore, more aesthetically pleasing to a viewer.

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Номер записи: 46
21-02-2013 дата публикации

Method and apparatus for assessing quality of video stream

Номер: US20130044224A1
Автор: Ning Liao, Xianlel Wang, Zhibo Chen
Принадлежит: Thomson Licensing SAS

Objective video quality assessment models at media-layer or at packet-layer are known for estimating audio/video quality of experience. Existing models are not able to provide stable performance. A method for enabling quality assessment of a stream of frames of video data comprises receiving a sequence of packets, generating a set of parameters and inserting said generated set of parameters as side information into said stream of frames, wherein at least one parameter refers to a video slice level. A method for assessing the quality of a stream of frames of video data comprises receiving a sequence of packets, extracting a set of parameters from said sequence of packets and generating an estimated mean opinion score, wherein the video data comprise a slice level and wherein the extracted set of parameters comprises at least one parameter that refers to a video slice level.

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Номер записи: 47
21-02-2013 дата публикации

Video source resolution detection

Номер: US20130044261A1
Автор: Advait Mogre, Brian Schoner, Darren Neuman, Jaewon Shin
Принадлежит: Broadcom Corp

Embodiments for video content source resolution detection are provided. Embodiments enable systems and methods that measure video content source resolution and that provide image-by-image source scale factor measurements to picture quality (PQ) processing modules. With the source scale factor information, PQ processing modules can be adapted dynamically (on a picture-by-picture basis) according to the source scale factor information for better picture quality enhancement. In addition, embodiments provide source resolution detection that is minimally affected by video coding artifacts and superimposed content (e.g., graphics).

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Номер записи: 48
21-02-2013 дата публикации

Applying partition-based filters

Номер: US20130044809A1
Автор: Geert Van der Auwera, In Suk Chong, Marta Karczewicz
Принадлежит: Qualcomm Inc

In general, techniques are described for applying partition-based filters when coding video data. A device comprising at least one processor may be configured to implement the techniques. The processor selects a filter to apply near a boundary of a first portion of the video data and determines at least one of the plurality of filter coefficients of the selected filter for which the video data will not be available to be filtered. Based on the determination, the processor determines a partial filter that does not include the at least one of the plurality of filter coefficients for which the video data will not be available to be filtered. The processor renormalizes the plurality of filter coefficients included within the partial filter and applies the renormalized partial filter near the boundary of the first portion of the video data to generate a filtered first portion of the video data.

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Номер записи: 49
07-03-2013 дата публикации

Adaptive restoration for video coding

Номер: US20130058400A1
Автор: Shaw-Min Lei, Yu-Wen Huang
Принадлежит: MediaTek Inc

A coding system includes a decoding block and a reconstruction loop with first and second adaptive restoration blocks. The decoding block receives and decodes an encoded bitstream to derive residues, prediction information, and adaptive restoration information. The reconstruction loop reconstructs a current frame according to the residues and prediction information. The first adaptive restoration block performs restoration on a first set of processed data according to a first set of the adaptive restoration information, and the second adaptive restoration block performs restoration on an output of the first adaptive restoration block according to a second set of the adaptive restoration information.

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Номер записи: 50
07-03-2013 дата публикации

Decoding apparatus, decoding method, and computer-readable storage medium

Номер: US20130058420A1
Автор: Hideaki Hattori
Принадлежит: Canon Inc

A selector selects one of a standard parameter corresponding to a filter strength contained in input movie image data and an original parameter originally set at the decoding side as a filter parameter to be used. A screen-display filter performs deblocking filtering using the filter parameter selected by the selector on decoded movie image data. A post-filter performs deblocking filtering using the standard parameter and stores the obtained decoded image data in a memory to allow it to be used in inter-frame compensation.

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Номер записи: 51
21-03-2013 дата публикации

Interpolation of video compression frames

Номер: US20130070851A1
Автор: Gary A. Demos
Принадлежит: Dolby Laboratories Licensing Corp

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

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Номер записи: 52
28-03-2013 дата публикации

Region sizing for macroblocks

Номер: US20130077692A1
Автор: Gary A. Demos
Принадлежит: Dolby Laboratories Licensing Corp

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

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Номер записи: 53
28-03-2013 дата публикации

Interpolation of video compression frames

Номер: US20130077693A1
Автор: Gary A. Demos
Принадлежит: Dolby Laboratories Licensing Corp

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

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Номер записи: 54
04-04-2013 дата публикации

Multi-mode error concealment, recovery and resilience coding

Номер: US20130083837A1
Автор: Brian Heng, Wade K. Wan, Zhijie Yang
Принадлежит: Broadcom Corp

Multi-mode error concealment, recovery and resilience coding. Adaptation of a number of coding units (CUs) employed in accordance with video coding may be made as a function of error. As a number of errors increases, the respective number of CUs may correspondingly increase (e.g., which may be made in accompaniment with a reduction of CU size). As a number of errors decreases, the respective number of CUs may correspondingly decrease (e.g., which may be made in accompaniment with an increase of CU size). Such errors may be associated with a type of source providing a video signal, a type of error resilience coding employed, communication link and/or channel conditions, a remote error characteristic (e.g., such as associated with a source device and/or destination device), a local error characteristic (e.g., such as associated with operations and/or processing within a given device), and/or any other type of consideration.

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Номер записи: 55
04-04-2013 дата публикации

Advance encode processing based on raw video data

Номер: US20130083840A1
Автор: Brian Heng, Wade K. Wan, Zhijie Yang
Принадлежит: Broadcom Corp

Advance encode processing based on raw video data. Adaptive processing of a video signal may be made by making one or more decisions and/or directing one or more encoding steps based upon characteristic(s) associated with the video signal in raw form (e.g., before the video signal undergoing any processing in accordance with generating an output video bitstream). Characteristic(s) associated with the video signal (raw form) may be used to drive intra-prediction angular mode selection, including making a preliminary/coarse angular mode selection (e.g., which may be refined and/or modified based upon partial and/or full processing of the video signal). Characteristic(s) associated with the video signal (raw form) may be used to drive intra-prediction/inter-prediction operational mode selection (or intra-prediction/inter-prediction/neither operational mode selection). An integrated and/or embedded video decoder within a video encoding device may be provisioned to assist in adaptation of one or more of the video encoding operations.

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Номер записи: 56
09-05-2013 дата публикации

Devices and methods for sample adaptive offset coding and/or signaling

Номер: US20130114677A1
Автор: David M. Baylon, Koohyar Minoo
Принадлежит: General Instrument Corp

In one embodiment, a method for decoding a video bitstream comprises the steps of: (a) receiving a video bitstream; (b) deriving processed video data from the bitstream; (c) partitioning the processed video data into blocks, wherein each of the blocks is equal to or smaller than a picture; (d) deriving an SAO type from the video bitstream for each of the blocks, wherein the SAO type is associated with a specific nonbiased coding scheme; (e) determining an SAO sub-class associated with the SAO type for each of the pixels in each of the blocks; (f) deriving intensity offset from the video bitstream for the sub-class associated with the SAO type; and (g) applying SAO compensation to each of the pixels in a processed video block, wherein the SAO compensation is based on the intensity offset of step (f).

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Номер записи: 57
09-05-2013 дата публикации

Video decoder with enhanced sample adaptive offset

Номер: US20130114682A1
Автор: Christopher A. Segall, Jie Zhao
Принадлежит: Sharp Laboratories of America Inc

A decoder decodes video received in a bitstream containing quantized coefficients representative of blocks of video representative of a plurality of pixels and a plurality of offset type characteristics. Each of the plurality of offset type characteristics is associated with a respective block of the video. A deblocking process deblocks the video to reduce artifacts proximate boundaries between the blocks of the video based upon deblocking information. A sample adaptive offset process classifies a pixel based upon the offset type characteristic associated with the respective block of the video and the deblocking information.

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Номер записи: 58
09-05-2013 дата публикации

Low-complexity intra prediction for video coding

Номер: US20130114713A1
Автор: Frank Jan Bossen, Thiow Keng Tan
Принадлежит: NTT DOCOMO INC

The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/AVC uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. In the present invention, at least some of one of an array of horizontal boundary pixels and an array of vertical boundary pixels are retrieved. Then, the retrieved pixels are added to the other boundary pixels to extend the array thereof. Intra prediction is performed, based solely on the extended array of boundary pixels.

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Номер записи: 59
16-05-2013 дата публикации

Motion compensated de-blocking

Номер: US20130121424A1
Автор: Lucas Hui, Patricia Wei Yin Chiang, Xiaoyun Deng
Принадлежит: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Digital noise removal methods and systems for picture quality improvement on next generation high quality set-top-box and digital TV SOCs is disclosed with particular to a de-blocking method and system that is effective on on-grid and off-grid blocky artifacts generated by lossy video compression standards. Blocky artifacts are filtered by extracting motions vectors for a current pixel block, calculating off-grid positions based on the extracted motion vectors, and applying de-blocking filtering along the calculated off-grid positions. The methods and systems can further skip filtering on-grid blocky artifacts to be filtered by an on-grid de-blocking filter known in the art.

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Номер записи: 60
23-05-2013 дата публикации

Moving image decoding apparatus, moving image decoding method and moving image encoding apparatus, and moving image encoding method

Номер: US20130128981A1
Автор: Akira Nakagawa, Hidenobu Miyoshi, Junpei Koyama, Kimihiko Kazui, Satoshi Shimada
Принадлежит: Fujitsu Ltd

A moving image decoding apparatus includes a region boundary position information extracting unit which extracts region boundary position information between a clean region including at least one block encoded such that a pixel value is guaranteed to be decoded correctly, and a non-clean region, a region classification unit which specifies the clean region and the non-clean region in each picture based on the region boundary position information, a referenceability determining unit which, when a decoding target block belongs to the clean region, determines that blocks in the clean region in the decoding target picture and blocks in the clean region in the reference picture are referenceable, and, when the decoding target block belongs to the non-clean region, determines that all of blocks of the decoding target picture and the reference picture are referenceable, and a decoding unit which decodes the decoding target block with reference to only the referenceable blocks.

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Номер записи: 61
06-06-2013 дата публикации

Syntax extension of adaptive loop filter in hevc

Номер: US20130142251A1
Автор: Ehsan Maani
Принадлежит: Sony Corp

An extension of an adaptive loop filter includes, in the sequence parameter set, a bit is added to signal whether the “default” or fixed adaptive loop filters are to be updated for this sequence. If yes, then the new set of default filters are explicitly coded. In the picture parameter set, a flag is used to determine whether to update the default filters at the picture level. If yes, filter coefficients are transmitted. In the Slice Header, a flag is added to show whether the online filter and the fixed filters are both available for block-level switching or not. Block-level filter switching is also referred to as ALF's CU control parameters. In the LCU Header, the maximum depth (minimum block-size) for the ALF's CU control parameters (block-level filter switchings) is explicitly signaled.

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Номер записи: 62
20-06-2013 дата публикации

Networked image/video processing system for enhancing photos and videos

Номер: US20130156091A1
Автор: Bill Reckwerdt, Wei Li
Принадлежит: IMERJ LLC

A distributed image/video processing system is disclosed herein wherein one or more of digital image/video recorders (e.g., a digital cameras, video recorders, or smart phones, etc.) are in network communication with central network site for transmitting image or video data thereto. The recorders process their image/video data dependent upon an estimate of a measurement of network bandwidth that is available for transmitting image or video data to the central network site.

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Номер записи: 63
20-06-2013 дата публикации

Adaptive Loop Filtering (ALF) for Video Coding

Номер: US20130156097A1
Автор: Madhukar Budagavi, Minhua Zhou
Принадлежит: Texas Instruments Inc

A method for adaptive loop filtering of a reconstructed picture in a video encoder is provided that includes determining whether or not sample adaptive offset (SAO) filtering is applied to the reconstructed picture, and using adaptive loop filtering with no offset for the reconstructed picture when the SAO filtering is determined to be applied to the reconstructed picture.

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Номер записи: 64
20-06-2013 дата публикации

Image interpolation method and apparatus

Номер: US20130156346A1
Автор: Tammy Lee, Woo-Jin Han
Принадлежит: SAMSUNG ELECTRONICS CO LTD

An image interpolation method and apparatus are provided. The image interpolation method includes: selecting different interpolation filters according to locations of sub pixels between integer pixels; and generating sub pixel values at the locations of the sub pixels using the selected interpolation filters.

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Номер записи: 65
18-07-2013 дата публикации

Image processing method and image processing apparatus

Номер: US20130182764A1
Автор: Matthias Narroschke, Thomas Wedi
Принадлежит: Panasonic Corp

An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter.

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Номер записи: 66
25-07-2013 дата публикации

Deblocking chroma data for video coding

Номер: US20130188744A1
Автор: Geert Van der Auwera, Marta Karczewicz, Xianglin Wang
Принадлежит: Qualcomm Inc

A video coding device is configured to obtain an array of sample values. The sample values may be formatted according to a 4:2:0, 4:2:2, or 4:4:4 chroma format. The video coding device determines whether to apply a first filter to rows of chroma sample values associated with defined horizontal edges within the array. The video coding device determines whether to apply a second filter to columns of chroma sample values associated with defined vertical edges. The horizontal and vertical edges may be separated by a number of chroma samples according to a deblocking grid.

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Номер записи: 67
01-08-2013 дата публикации

Recording medium having recorded thereon coded information using plus and/or minus rounding of images

Номер: US20130195193A1
Автор: Yuichiro Nakaya
Принадлежит: HITACHI LTD

Computer-readable medium with an image decoding program performing: storing a reference image of a previously decoded image; receiving coded information including motion vector and rounding method information specifying a rounding method used in synthesizing a prediction image of a currently decoded image; and synthesizing prediction image by performing motion compensation using the motion vector information and reference image; wherein synthesizing a prediction image uses a positive and negative rounding method for interpolating pixel intensity values; wherein the interpolation of pixel intensity values uses a rounding method specified by the rounding method information; wherein interpolation is via the rounding method specified by rounding method information included in the encoded bitstream when the current frame is a P frame; wherein the rounding method information is not in the encoded bitstream when the current frame is an I frame; and wherein the rounding method information specifies one of a plurality of values.

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Номер записи: 68
01-08-2013 дата публикации

Recording medium having recorded thereon coded information using plus and/or minus rounding of images

Номер: US20130195196A1
Автор: Yuichiro Nakaya
Принадлежит: HITACHI LTD

Computer-readable medium having an image decoding program performing: storing a reference image of a previously decoded image; receiving coded information including motion vector and rounding method information specifying a rounding method for synthesizing a prediction image of a currently decoded image; and synthesizing the prediction image via motion compensation using the motion vector information and reference image, using a positive and negative rounding method for interpolating pixel intensity values; wherein interpolation of pixel intensity values uses a rounding method specified by the rounding method information included in the encoded current P frame bitstream; wherein the rounding method information is not received from the encoded I frame bitstream; wherein the rounding method information includes a header section of the currently decoded image's coded information, and specifies one of two values; and wherein one of the two values specifies a positive rounding method, and another specifies a negative rounding method.

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Номер записи: 69
01-08-2013 дата публикации

Recording medium having recorded thereon coded information using plus and/or minus rounding of images

Номер: US20130195197A1
Автор: Yuichiro Nakaya
Принадлежит: HITACHI LTD

Computer-readable medium having an image decoding program performing: storing a reference image of a previously decoded image; receiving coded information including motion vector and rounding method information specifying a rounding method for synthesizing a prediction image of a currently decoded image; and synthesizing via motion compensation using the motion vector information and reference image, using a positive and negative rounding method for interpolating pixel intensity values; wherein interpolation of pixel intensity values uses a rounding method specified by the rounding method information included in the encoded current P frame bitstream; wherein the rounding method information is not received from the encoded I frame bitstream; wherein the rounding method information includes a header section of the currently decoded image's coded information, and specifies one of two values; and wherein one specifies a positive rounding method, and another a negative rounding method; and wherein the rounding method information is one bit.

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Номер записи: 70
08-08-2013 дата публикации

Recording medium having recorded thereon coded information using plus and/or minus rounding of images

Номер: US20130202043A1
Автор: Yuichiro Nakaya
Принадлежит: HITACHI LTD

Computer-readable medium having an image decoding program performing: storing a reference image of a previously decoded image; receiving coded information including motion vector and rounding method information specifying a rounding method for synthesizing a prediction image of a currently decoded image; and synthesizing the prediction image via motion compensation using the motion vector information and reference image, using a positive and negative rounding method for interpolating pixel intensity values; wherein interpolation of pixel intensity values uses a rounding method specified by the rounding method information included in the encoded current P frame bitstream; wherein the rounding method information is not received from the encoded I frame bitstream; wherein rounding method information specifies one of two values; and wherein one of the two values specifies a positive rounding method, and another of the two values specifies a negative rounding method, and wherein the rounding method information has one bit.

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Номер записи: 71
22-08-2013 дата публикации

Encoding and decoding device and method using intra prediction

Номер: US20130215958A1
Автор: Jeongyeon Lim, Ji Hong Kang, Jinhan Song, Yonggoo Kim, Yoonsik Choe, Yung Ho Choi
Принадлежит: SK TELECOM CO LTD

The present disclosure relates to encoding and decoding apparatus and method using intra prediction. The encoding apparatus includes a reference pixel characteristics extractor for receiving reference pixel(s) included in neighboring blocks of a target block to encode to determine a reference pixel characteristic and determining whether adaptive filtering is applied to the reference pixel(s), based on reference pixel characteristic; a first intra predictor responsive to when the adaptive filtering is determined by the reference pixel characteristics extractor to be applied for comparing between results of performing intra prediction using high-frequency filtered reference pixel and intra prediction using high-frequency-unfiltered reference pixel to output the cost-efficient result along with filtering information indicating whether to perform filtering; and a second intra predictor for outputting the result of performing the intra prediction using the high-frequency-unfiltered reference pixel when the reference pixel characteristics extractor determines that the adaptive filtering is not to be applied.

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Номер записи: 72
29-08-2013 дата публикации

Error Resilient Rate Distortion Optimization for Image and Video Encoding

Номер: US20130223513A1
Автор: Alexandros Tourapis, Peshala V. Pahalawatta, Zhifeng Chen
Принадлежит: Dolby Laboratories Licensing Corp

Error resilient rate distortion optimization (ERRDO) is used for transmitting high quality images and video over constrained bandwidth networks, e.g., in streaming applications. Transmitting high quality images and video by reducing computational complexity is described.

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Номер записи: 73
29-08-2013 дата публикации

Sample Adaptive Offset (SAO) Parameter Signaling

Номер: US20130223542A1
Автор: Do-Kyoung Kwon, Minhua Zhou, Woo-shik Kim
Принадлежит: Texas Instruments Inc

Techniques for signaling of sample adaptive offset (SAO) information that may reduce the coding rate for signaling such information in the compressed bit stream are provided. More specifically, techniques are provided that allow SAO information common to two or more of the color components to be signaled using one or more syntax elements (flags or indicators) representative of the common information. These techniques reduce the need to signal SAO information separately for each color component.

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Номер записи: 74
12-09-2013 дата публикации

Masking video artifacts with comfort noise

Номер: US20130235931A1
Автор: Chris Y. CHUNG, Hsi-Jung Wu, YEPING Su
Принадлежит: Apple Inc

A system and method is presented to mask artifacts with content-adaptive comfort noise. Encoder side analysis may determine initial comfort noise characteristics. Noise parameters may then be developed for each frame or sequence of frames that define comfort noise patches that mask the artifacts. At the decoder, a comfort noise patch can be fetched from memory or created based on the amplitude and spatial characteristics of the comfort noise specified in the noise parameters. The noise patch may additionally be scaled or otherwise adjusted to accommodate the capabilities and/or limitations of the specific decoder.

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Номер записи: 75
12-09-2013 дата публикации

Signal shaping techniques for video data that is susceptible to banding artifacts

Номер: US20130235942A1
Автор: Douglas Scott PRICE, Hao Pan, Hsi-Jung Wu, James Oliver Normile, Ke Zhang, YEPING Su
Принадлежит: Apple Inc

Video coding systems and methods protect against banding artifacts in decoded image content. According to the method, a video coder may identify, from content of pixel blocks of a frame of video data, which pixel blocks are likely to exhibit banding artifacts from the video coding/decoding processes. The video coder may assemble regions of the frame that are likely to exhibit banding artifacts based on the identified pixel blocks' locations with respect to each other. The video coder may apply anti-banding processing to pixel blocks within one or more of the identified regions and, thereafter, may code the processed frame by a compression operation.

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Номер записи: 76
26-09-2013 дата публикации

Image processing device and image processing method

Номер: US20130251029A1
Автор: Masaru Ikeda
Принадлежит: Sony Corp

Provided is an image processing device including a decoding section that decodes an encoded stream to generate an image, a line determining section that determines whether to apply a deblocking filter to each of lines perpendicular to a boundary in neighboring blocks neighboring across the boundary in the image generated by the decoding section, and a filtering section that applies the deblocking filter to each line to which the line determining section determines to apply the deblocking filter.

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Номер записи: 77
17-10-2013 дата публикации

Method and apparatus for objective video quality assessment based on continuous estimates of packet loss visibility

Номер: US20130271668A1
Автор: Alexander Raake, Bernhard Feiten, Marie-Neige Garcia, Peter List, Savvas Argyropoulos
Принадлежит: DEUTSCHE TELEKOM AG

A method for assessing the quality of a transmitted video signal sequence at a receiver side includes: capturing the input video bit stream; extracting at least one feature or a set of features; determining the continuous probability of visibility for each packet loss event which occurred within a specific time interval; and employing the continuous probability of packet loss visibility as a weighting factor of the at least one feature or set of features extracted from the video bit stream to calculate an estimate of the overall quality, Q, of the transmitted video sequence.

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Номер записи: 78
31-10-2013 дата публикации

Method and device for encoding a video frame, method and device for decoding a video frame and storage medium

Номер: US20130287101A1
Автор: Philippe Bordes, Philippe Salmon, Pierre Andrivon
Принадлежит: Thomson Licensing SAS

A method and a device are described for modifying a video frame for encoding or decoding wherein values of pixels of the video frame are represented an increased bit depth. The described method comprises using processing means for executing the step of offsetting the pixel values of increased bit depth with offsets, the offsets depending on a spatial neighbourhood of the pixel to-be-offset. Such local adaptive offsetting of pixel values de-emphasizes high frequencies in the transform domain artificially emphasized by the bit depth increase.

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Номер записи: 79
07-11-2013 дата публикации

Image processing device, and image processing method

Номер: US20130294705A1
Автор: Kenji Kondo
Принадлежит: Sony Corp

When a motion prediction/compensation unit 32 generates predicted image data by performing motion compensation using reference image data based on a motion vector detected through motion detection, a compensation control unit 3231 switches a filter coefficient supplied from a coefficient table 3232 to a filter unit 3233 according to a loop filter process on the reference image data used to generate the predicted image data. For example, when the loop filter process is not performed, a filter process is performed on the reference image data with filter characteristics in which noise removal strength is high. Therefore, since the predicted image data with small noise can be generated, and deterioration in the quality of a predicted image is reduced, and thus deterioration in compression efficiency can be suppressed.

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Номер записи: 80
14-11-2013 дата публикации

System and Method of Streaming 3-D Wireframe Animations

Номер: US20130300824A1
Автор: Joern Ostermann, Sokratis Varakliotis
Принадлежит: AT&T Corp, AT&T Intellectual Property II LP

Optimal resilience to errors in packetized streaming 3-D wireframe animation is achieved by partitioning the stream into layers and applying unequal error correction coding to each layer independently to maintain the same overall bitrate. The unequal error protection scheme for each of the layers combined with error concealment at the receiver achieves graceful degradation of streamed animation at higher packet loss rates than approaches that do not account for subjective parameters such as visual smoothness.

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Номер записи: 81
14-11-2013 дата публикации

Method of content adaptive video encoding

Номер: US20130301703A1
Автор: Atul Puri, Mehmet Reha Civanlar
Принадлежит: AT&T Intellectual Property II LP

A method of content adaptive encoding video comprising segmenting video content into segments based on predefined classifications or models. Based on the segment classifications, each segment is encoded with a different encoder chosen from a plurality of encoders. Each encoder is associated with a model. The chosen encoder is particularly suited to encoding the unique subject matter of the segment. The coded bit-stream for each segment includes information regarding which encoder was used to encode that segment. A matching decoder of a plurality of decoders is chosen using the information in the coded bitstream to decode each segment using a decoder suited for the classification or model of the segment. If scenes exist which do not fall in a predefined classification, or where classification is more difficult based on the scene content, these scenes are segmented, coded and decoded using a generic coder and decoder.

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Номер записи: 82
14-11-2013 дата публикации

Interpolation of video compression frames

Номер: US20130301729A1
Автор: Gary A. Demos
Принадлежит: Dolby Laboratories Licensing Corp

Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.

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Номер записи: 83
14-11-2013 дата публикации

Image processing device and method

Номер: US20130301941A1
Автор: Kazushi Sato
Принадлежит: Sony Corp

The present invention relates to an image processing device and method which enable encoding efficiency in intra prediction to be improved. In the event that the optimal intra prediction mode is mode 0 , adjacent pixels to be used for prediction of the current block are pixels A 0 , A 1 , A 2 , and A 3 . According to these pixels and a 6-tap FIR filter, pixels a −0.5 , a +0.5 , and so on with ½ pixel precision are generated, and further, pixels a −0.75 , a −0.25 , a +0.25 , and a +0.75 with ¼ pixel precision are generated by linear interpolation. Subsequently, the optimal shift amount is determined with a value of −0.75 through +0.75 that is phase difference between an integer pixel and generated fractional pixel precision serving as a candidate of the shift amount in the horizontal direction. The present invention may be applied to an image encoding device which performs encoding using the H.264/AVC system, for example.

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Номер записи: 84
28-11-2013 дата публикации

Moving picture coding method, moving picture decoding method, moving picture coding apparatus, moving picture decoding apparatus, and moving picture coding and decoding apparatus

Номер: US20130315297A1
Автор: Hisao Sasai, Kengo Terada, Kyoko Tanikawa, Toru Matsunobu, Toshiyasu Sugio, Youji Shibahara
Принадлежит: Panasonic Corp

A moving picture coding method includes: performing context adaptive binary arithmetic coding in which a variable probability value is used, on first information among multiple types of sample adaptive offset (SAO) information used for SAO that is a process of assigning an offset value to a pixel value of a pixel included in an image generated by coding the input image; and continuously performing bypass arithmetic coding in which a fixed probability value is used, on second information and third information among the multiple types of the SAO information, wherein the coded second and third information are placed after the coded first information in the bit stream.

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Номер записи: 85
05-12-2013 дата публикации

Efficient decisions for deblocking

Номер: US20130322548A1
Автор: Matthias Narroschke, Semih Esenlik, Thomas Wedi
Принадлежит: Panasonic Corp

The present invention relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of image or video signal. In particular, the present invention relates to performing an efficient and accurate decision on whether or not to apply deblocking filtering on an image block. The efficient and accurate decision is achieved by performing individual decisions on whether or not to apply deblocking filtering for segments of a boundary between adjacent image blocks, wherein the individual decision are based on pixels comprised in a subset of the pixel lines that the image blocks are composed of.

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Номер записи: 86
05-12-2013 дата публикации

Image processing apparatus and method for three-dimensional (3d) image

Номер: US20130322738A1
Автор: Byung Tae Oh, Du Sik Park, Jae Joon Lee
Принадлежит: SAMSUNG ELECTRONICS CO LTD

An image processing apparatus and method for a three-dimensional (3D) image is provided. The image processing apparatus may include a parameter setting unit to set a first parameter related to a color image, and a parameter determining unit to determine an optimal second parameter related to a depth image, using the first parameter.

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Номер записи: 87
12-12-2013 дата публикации

Adaptive upsampling filters

Номер: US20130329782A1
Автор: Chengjie Tu, Jianle Chen, Marta Karczewicz, Vadim Seregin
Принадлежит: Qualcomm Inc

In one embodiment, a video coder for coding video data includes a processor and a memory. The processor selects a filter set from a multiple filter sets for upsampling reference layer video data based at least on a prediction operation mode for enhanced layer video data and upsamples the reference layer video data using the selected filter set. Some of the multiple filter sets have some different filter characteristics from one another, and the upsampled reference layer video data has the same spatial resolution as the enhanced layer video data. The processor further codes the enhanced layer video data based at least on the upsampled reference layer video data and the prediction operation mode. The memory stores the upsampled reference layer video data.

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Номер записи: 88
02-01-2014 дата публикации

Block Error Compensating Apparatus of Image Frame and Method Thereof

Номер: US20140003514A1
Автор: Sung Kyu Lee
Принадлежит: LG ELECTRONICS INC

An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.

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Номер записи: 89
09-01-2014 дата публикации

Imaging processing apparatus, image processing system and method for processing image

Номер: US20140010455A1
Автор: Keisuke Azuma
Принадлежит: Toshiba Corp

According to one embodiment, an image processing apparatus includes an image block generator, a pixel extractor, a correction parameter calculator and a corrector. The image block generator enlarges an image block including a plurality of pixels to generate an enlarged image block. The pixel extractor extracts a maximum pixel with a maximum pixel value and a minimum pixel with a minimum pixel value from the image block. The correction parameter calculator calculates a correction parameter including a first difference and a second difference. The first difference is an absolute value of a difference between a sample pixel value of a sample pixel to be corrected in the enlarged image block and the maximum pixel value. The second difference is an absolute value of a difference between the sample pixel value and the minimum pixel value. The corrector corrects the enlarged image block using the correction parameter.

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Номер записи: 90
06-02-2014 дата публикации

Method and Apparatus for Video Processing Incorporating Deblocking and Sample Adaptive Offset

Номер: US20140036992A1
Автор: Chi-cheng Ju, Huei-Min Lin, Ping Chao, Yung-Chang Chang
Принадлежит: MediaTek Inc

A method and apparatus for applying DF processing and SAO processing to reconstructed video data are disclosed. The DF processing is applied to a current access element of reconstructed video data to generate DF output data and the deblocking status is determined while applying the DF processing. Status-dependent SAO processing is applied to one or more pixels of the DF output data according to the deblocking status. The status-dependent SAO processing comprises SAO processing, partial SAO processing, and no SAO processing. The SAO starting time for SAO processing is between the DF-output starting time and ending time for the current block. The DF starting time of a next block can be earlier than the SAO ending time of the current block by a period oft, where t is smaller than time difference between the DF-output starting time and the DF starting time of the next block.

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Номер записи: 91
13-02-2014 дата публикации

Adative up-sampling filter for scalable video coding

Номер: US20140044161A1
Автор: Chengjie Tu, Jianle Chen, Krishnakanth RAPAKA, Marta Karczewicz, Vadim Seregin, Xiang Li
Принадлежит: Qualcomm Inc

Methods and systems for video image coding are provided. Sets of filters may be selected and applied to video information at least partially based on the type of inter layer prediction implemented in coding the video information. Different filters, or filter sets, may be used for inter layer intra prediction, difference domain intra prediction, and/or difference domain inter prediction. Filter selection information may be embedded in the video bit stream.

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Номер записи: 92
13-02-2014 дата публикации

Image coding device, image decoding device, image coding method, and image decoding method

Номер: US20140044369A1
Автор: Akira Minezawa, Hiroharu Sakate, Kazuo Sugimoto, Shunichi Sekiguchi, Tokumichi Murakami
Принадлежит: Mitsubishi Electric Corp

When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.

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Номер записи: 93
13-03-2014 дата публикации

Apparatus and method for processing image using correlation between views

Номер: US20140071233A1
Автор: Ho Cheon Wey, Il Soon Lim, Jae Joon Lee
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A method and apparatus for processing an image using correlation between views may include a noise removal unit to remove noise from at least one input depth image, a view transformation unit to perform view transformation of a depth space of a first view among the at least one input depth image, so that the depth space of a first view of a second view is transformed to a depth space of a first view, a weighted mean filter unit to generate at least one weighting coefficient from a first depth image of the first view and the depth space of a first view, and to generate a weighted mean filter using the generated weighting coefficient, and a depth image transformation unit to transform a third depth image from the first depth image and the depth space of a first view, by applying the generated weighted mean filter.

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Номер записи: 94
13-03-2014 дата публикации

Method of determining motion vectors for bi-predictive image block

Номер: US20140072042A1
Автор: Byeong Moon Jeon
Принадлежит: LG ELECTRONICS INC

In one embodiment, the method includes determining a motion vector of a current image block equal to a motion vector of an image block based on a reference picture index indicating a reference picture for the image block. For example, the motion vector of the current image block may be equal to the motion vector of the image block if the reference picture index indicates a long-term reference picture for the image block.

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Номер записи: 95
13-03-2014 дата публикации

Method of determining motion vectors for bi-predictive image block

Номер: US20140072052A1
Автор: Byeong Moon Jeon
Принадлежит: LG ELECTRONICS INC

In one embodiment, the method includes determining a motion vector of a current image block equal to a motion vector of an image block based on a reference picture index indicating a reference picture for the image block. For example, the motion vector of the current image block may be equal to the motion vector of the image block if the reference picture index indicates a long-term reference picture for the image block.

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Номер записи: 96
13-03-2014 дата публикации

Video display preference filtering

Номер: US20140072057A1
Автор: Alexandros Tourapis, Athanasios Leontaris
Принадлежит: Apple Inc

Video coding schemes may include one or more filters to reduce coding artifacts and improve video quality. These filters may be applied to decode video data in a predetermined sequence. The output from one or more of these filters may be selected for different images, blocks, or sets of video data and then copied and/or routed to a display or a buffer storing reference data that is used to decode other video data in a data stream. Providing the ability to select which filter output is used for display and as a reference may result in better video quality for multiple types of video data. The filters that are selected for display and for reference may be different and may vary for different images, blocks, and data sets.

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Номер записи: 97
03-04-2014 дата публикации

Picture processing in scalable video systems

Номер: US20140092972A1
Автор: Christopher Andrew Segall, Jie Zhao, Kiran Mukesh MISRA
Принадлежит: Individual

A system utilizing picture processing in a scalable video system is described. The system may include an electronic device configured to recover a picture processing index corresponding to one or more picture processors, e.g. upsamplers, filters, or the like, or any combination thereof. The picture processing index may associate a particular picture processor of a set of picture processors available to the decoder with a unit, e.g. a coding unit or a prediction unit of a coding unit.

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Номер записи: 98
03-04-2014 дата публикации

Enhanced user experience for miracast devices

Номер: US20140096164A1
Автор: JianWei Bei, Manish Kumar
Принадлежит: MARVELL WORLD TRADE LTD

A method is implementable in a source device that is operable to provide, via a wireless channel, a video stream to a sink device for display by the sink device. The method includes receiving compressed video data corresponding to one or more video frames of the video stream, and generating a current packet of a plurality of packets. The plurality of packets collectively includes the compressed video data. The current packet includes a current portion of the compressed video data and recovery information indicative of at least one of (i) an arrangement of an earlier portion of the compressed video data, or (ii) content of the earlier portion of the compressed video data, wherein the earlier portion of the compressed video data is data included in an earlier packet of the plurality of packets. The method also includes causing the current packet to be transmitted to the sink device.

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Номер записи: 99
01-01-2015 дата публикации

Image decoding device, image encoding device, and data structure of encoded data

Номер: US20150003524A1
Автор: Takeshi Tsukuba, Tomohiro Ikai, Tomoyuki Yamamoto, Yukinobu Yasugi
Принадлежит: Sharp Corp

Memory required during decoding is reduced. A video image decoding device ( 1 ) is equipped with main direction deriving means ( 1453 A) that references a prediction mode definition DEFPM( 1 ), and from a prediction mode number, derives a main direction of a prediction direction corresponding to a prediction mode, and a gradient deriver ( 1453 B) that references a gradient definition table DEFANG( 1 ), and derives a gradient of the prediction direction.

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Номер записи: 100