US 12,170,766 B2
Constraints on adaptation parameter set syntax elements
Zhipin Deng, Beijing (CN); Li Zhang, San Diego, CA (US); Ye-Kui Wang, San Diego, CA (US); Kai Zhang, San Diego, CA (US); and Jizheng Xu, San Diego, CA (US)
Assigned to BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., Beijing (CN); and BYTEDANCE INC., Los Angeles, CA (US)
Filed by Beijing Bytedance Network Technology Co., Ltd., Beijing (CN); and Bytedance Inc., Los Angeles, CA (US)
Filed on Oct. 3, 2022, as Appl. No. 17/958,531.
Application 17/958,531 is a continuation of application No. PCT/CN2021/085009, filed on Apr. 1, 2021.
Claims priority of application No. PCT/CN2020/082728 (WO), filed on Apr. 1, 2020.
Prior Publication US 2023/0058538 A1, Feb. 23, 2023
Int. Cl. H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/186 (2014.01); H04N 19/196 (2014.01); H04N 19/70 (2014.01); H04N 19/86 (2014.01); H04N 19/157 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/124 (2014.11); H04N 19/186 (2014.11); H04N 19/196 (2014.11); H04N 19/70 (2014.11); H04N 19/157 (2014.11); H04N 19/86 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
performing a conversion between a video and a bitstream of the video according to a format rule,
wherein the format rule specifies whether values of one or more first syntax elements related to adaptive loop filters used for a chroma component included in an adaptation parameter set (APS) are constrained or not is based on: (i) whether a second syntax element at a picture level or a slice level indicating an APS identifier that a luma component refers to is present or not, and (ii) whether an index of color format is equal to 0 or not, and
wherein the one or more first syntax elements comprise at least one of a syntax element indicating whether a chroma filter is signalled or not which equal to 0 indicating the chroma filter is not signalled, a syntax element indicating whether cross-component filters for a Cr colour component are signalled or not which equal to 0 indicating the cross-component filters for the Cr colour component are not signalled, or a syntax element indicating whether cross-component filters for a Cb colour component are signalled or not which equal to 0 indicating the cross-component filters for the Cb colour component are not signalled.