US 11,750,806 B2
Adaptive color transform in video coding
Weijia Zhu, San Diego, CA (US); Li Zhang, San Diego, CA (US); Jizheng Xu, San Diego, CA (US); Kai Zhang, San Diego, CA (US); and Ye-kui Wang, San Diego, CA (US)
Assigned to BYTEDANCE INC., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Jun. 29, 2022, as Appl. No. 17/852,934.
Application 17/852,934 is a continuation of application No. PCT/US2020/067264, filed on Dec. 29, 2020.
Claims priority of application No. PCT/CN2019/130851 (WO), filed on Dec. 31, 2019.
Prior Publication US 2022/0368898 A1, Nov. 17, 2022
Int. Cl. H04N 19/117 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/82 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
applying, during a conversion between a video unit of a video and a bitstream of the video, a deblocking filter to at least some samples on boundaries of the video unit, wherein deblocking quantization parameter (QP) values used in the deblocking filter are determined according to a rule; and
performing the conversion based on the deblocking QP values,
wherein the rule specifies that a relationship between the deblocking QP values and dequantization QP values used in a quantization or dequantization process for the video unit is based on whether an adaptive color transform mode is applied to the video unit,
wherein in the adaptive color transform mode, for an encoding operation, visual signals are converted from a first color domain to a second color domain, or for a decoding operation, the visual signals are converted from the second color domain to the first color domain,
wherein the video unit is a chroma coding block, and the rule specifies that a differential coding tool is not applied to the chroma coding block when the adaptive color transform mode is applied to the chroma coding block, and
wherein in a differential coding mode, residuals of samples of the chroma coding block are represented in the bitstream using differences between quantized residuals and predictors of the quantized residuals.