US 11,968,367 B2
Context modeling of side information for reduced secondary transforms in video
Kui Fan, San Diego, CA (US); Li Zhang, San Diego, CA (US); Kai Zhang, San Diego, CA (US); Hongbin Liu, Beijing (CN); and Yue Wang, 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 Dec. 28, 2022, as Appl. No. 18/089,672.
Application 18/089,672 is a continuation of application No. 17/585,788, filed on Jan. 27, 2022, granted, now 11,575,901.
Application 17/585,788 is a continuation of application No. PCT/CN2020/109476, filed on Aug. 17, 2020.
Claims priority of application No. PCT/CN2019/101230 (WO), filed on Aug. 17, 2019; application No. PCT/CN2019/107904 (WO), filed on Sep. 25, 2019; and application No. PCT/CN2019/127829 (WO), filed on Dec. 24, 2019.
Prior Publication US 2023/0145133 A1, May 11, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/13 (2014.01); H04N 19/176 (2014.01); H04N 19/60 (2014.01); H04N 19/70 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/176 (2014.11); H04N 19/60 (2014.11); H04N 19/70 (2014.11); H04N 19/96 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for processing video data, comprising:
performing a conversion between a current video region of a video and a bitstream of the video,
wherein the performing of the conversion includes configuring a context model for coding a first bin, the first bin and a second bin included in a bin string corresponding to a first index of a secondary transform tool applied to the current video region, wherein the context model is configured only based on a partition type of the current video region and without considering a multiple transform selection index,
wherein the first index indicates an applicability of the secondary transform tool and/or a kernel information of the secondary transform tool, and
wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or
wherein the secondary transform tool includes applying, during decoding, an inverse secondary transform to an output of dequantization to the video block before applying an inverse primary transform.