US 12,278,949 B2
Quantization properties of adaptive in-loop color-space transform for video coding
Li Zhang, San Diego, CA (US); Jizheng Xu, San Diego, CA (US); Kai Zhang, San Diego, CA (US); Hongbin Liu, Beijing (CN); Weijia Zhu, San Diego, CA (US); and Yue Wang, Beijing (CN)
Assigned to BEIJING BYTEDANCE 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 22, 2023, as Appl. No. 18/321,426.
Application 18/321,426 is a continuation of application No. 17/737,260, filed on May 5, 2022, granted, now 11,671,591.
Application 17/737,260 is a continuation of application No. PCT/CN2020/126962, filed on Nov. 6, 2020.
Claims priority of application No. PCT/CN2019/116280 (WO), filed on Nov. 7, 2019.
Prior Publication US 2023/0291894 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/189 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/189 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of processing video data, comprising:
determining, for a conversion between a video comprising a current video block and a bitstream of the video, that a first coding tool is used based on a rule for the current video block; and
performing the conversion according to the determining,
wherein the first coding tool includes transforming a representation of a visual signal between two color spaces, and
wherein the rule specifies that a first quantization parameter offset for a luma channel of the current video block is equal to K1 and a second quantization parameter offset for a first chroma channel of the current video block is K1+O, whereby K1 and O are integers.