Method and apparatus for complexity control in high throughput jpeg 2000 (htj2k) encoding
Номер патента: EP4049454A1
Опубликовано: 31-08-2022
Автор(ы): David Scott Taubman
Принадлежит: Kakadu R&D Pty Ltd
Опубликовано: 31-08-2022
Автор(ы): David Scott Taubman
Принадлежит: Kakadu R&D Pty Ltd
Реферат: Methods for management of encoding complexity for image and video encoding, for example for algorithms belonging to the JPEG 2000 family of standards, where the encoding process targets a given compressed size (i.e. a total coded length) for the image or for each frame of a video sequence. Described are a set of methods for complexity constrained encoding of HTJ2K code-streams, involving collection of local or global statistics for each sub-band (not for each code-block), generation of forecasts for the statistics of sub-band samples that have not yet been produced by spatial transformation and quantization processes, and the use of this information to generate a global quantization parameter, from which the coarsest bit-plane to generate in each code-block can be deduced. Coded length estimates can be generated in a manner that enables latency and memory to be separately optimized against encoded image quality, while maintaining low computational complexity.
Method and image processing apparatus for video coding
Номер патента: US11431971B2. Автор: Ching-Chieh Lin,Chang-Hao YAU,Bing-Jung Fuh. Владелец: Industrial Technology Research Institute ITRI. Дата публикации: 2022-08-30.