US 12,382,041 B2
Coded video processing using enhanced secondary transform
Kai Zhang, San Diego, CA (US); Li Zhang, San Diego, CA (US); Tianliang Fu, Beijing (CN); Yue Wang, Beijing (CN); and Siwei Ma, Beijing (CN)
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 Sep. 26, 2022, as Appl. No. 17/953,045.
Application 17/953,045 is a continuation of application No. PCT/CN2021/082962, filed on Mar. 25, 2021.
Claims priority of application No. PCT/CN2020/081174 (WO), filed on Mar. 25, 2020.
Prior Publication US 2023/0037443 A1, Feb. 9, 2023
Int. Cl. H04N 19/12 (2014.01); H04N 19/124 (2014.01); H04N 19/126 (2014.01); H04N 19/172 (2014.01); H04N 19/176 (2014.01); H04N 19/189 (2014.01); H04N 19/60 (2014.01); H04N 19/61 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/12 (2014.11) [H04N 19/124 (2014.11); H04N 19/126 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/189 (2014.11); H04N 19/60 (2014.11); H04N 19/61 (2014.11); H04N 19/70 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method of processing video data, comprising:
performing a conversion between a video block of a video and a bitstream of the video according to a rule,
wherein the rule specifies whether an implicit indication manner or an explicit indication manner is applied for indicating a usage of a secondary transform for the video block within a video unit is indicated in the bitstream,
wherein the secondary transform is applied before quantization or after de-quantization, and
wherein the secondary transform is applied between forward primary transform and quantization or between de-quantization and invert primary transform;
wherein whether the implicit indication manner or the explicit indication manner is applied for indicating the usage of the secondary transform is based on a coding mode of the video block;
wherein whether the implicit indication manner or the explicit indication manner is applied for indicating the usage of the secondary transform is determined based on whether a pulse-coded modulation (PCM) coding tool is applied to the video block; and
wherein in response to the PCM coding tool being applied to the video block, the implicit indication manner of not using the secondary transform is applied to the video block.