US 11,750,799 B2
Methods for cross component dependency reduction
Zhipin Deng, Beijing (CN); Li Zhang, San Diego, CA (US); Hongbin Liu, Beijing (CN); 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 10, 2022, as Appl. No. 17/740,753.
Application 17/740,753 is a continuation of application No. 17/406,284, filed on Aug. 19, 2021.
Application 17/406,284 is a continuation of application No. PCT/CN2020/086111, filed on Apr. 22, 2020.
Claims priority of application No. PCT/CN2019/083846 (WO), filed on Apr. 23, 2019.
Prior Publication US 2022/0279169 A1, Sep. 1, 2022
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/169 (2014.01); H04N 19/30 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/1883 (2014.11); H04N 19/30 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of processing video data, comprising:
determining, during a conversion between a current chroma video block of a video and a bitstream of the video, that a scaling process is applied on chroma residual samples of the current chroma video block; and
performing the conversion by applying the scaling process on the chroma residual samples,
wherein, in the scaling process, the chroma residual samples are scaled based on at least one scaling factor before being used to reconstruct the current chroma video block,
wherein the at least one scaling factor is derived based on an averaged luma variable computed based on at least one neighboring luma block of a video unit of the video which is determined based on a luma sample corresponding to a top-left sample of the current chroma video block, and
wherein, in response to all of the at least one neighboring luma block being unavailable, the averaged luma variable is set to a default fixed value.