JOINT CODING OF CHROMA RESIDUALS AND ADAPTIVE COLOR TRANSFORMS

摘要

Methods, systems and devices for implementing joint coding of chroma residuals (JCCR) and the adaptive color transform (ACT) mode during image/video encoding and decoding are described. An example method of video processing includes determining that a coding mode of a current video block of a video comprises an ACT mode and a JCCR coding tool is enabled for coding the current video block, and performing, based on the determining, a conversion between the video and a bitstream of the video, wherein a quantization parameter offset used for coding the current video block is based on a mode used by the JCCR coding tool.