US 12,413,784 B2
Deblocking signaling in video coding
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 May 30, 2023, as Appl. No. 18/325,592.
Application 18/325,592 is a continuation of application No. 17/962,882, filed on Oct. 10, 2022, granted, now 11,743,506.
Application 17/962,882 is a continuation of application No. PCT/CN2021/086111, filed on Apr. 9, 2021.
Claims priority of application No. PCT/CN2020/083967 (WO), filed on Apr. 9, 2020.
Prior Publication US 2023/0319312 A1, Oct. 5, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/184 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/184 (2014.11)] 17 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
performing a conversion between a video region of a video and a bitstream of the video according to a format rule, and
wherein the format rule specifies that a constraint on a value of a first syntax element in an adaptation parameter set (APS) is based on a chroma format index and APS identifier information included in a picture header (PH) or a slice header (SH) in response to a picture or a slice referring to the APS, wherein the first syntax element specifies whether chroma-related APS syntax elements are allowed to be present in the APS or not, and wherein the constraint is checked after parsing the APS and the PH or SH;
wherein the format rule specifies that an applicability of a deblocking filter for the video region is determined based on i) a first disabled control syntax element in a picture parameter set and ii) a second disabled control syntax element in the picture header or a third disabled control syntax element in the slice header,
wherein a value of the first disabled control syntax element equal to 0 specifies that the deblocking filter is enabled for slices in pictures referring to the picture parameter set unless overridden for the picture or the slice by information present in the picture header or the slice header,
wherein the value of the first disabled control syntax element equal to 1 specifies that the deblocking filter is disabled for slices in pictures referring to the picture parameter set unless overridden for a picture or a slice by information present in the picture header or the slice header, and
wherein the format rule specifies that whether to include the third disabled control syntax element in the slice header is dependent on (1) the value of the first disabled control syntax element and (2) a value of a fifth syntax element indicating an allowability of a presence of deblocking parameters in the slice header.