Adaptive in-loop color-space transform for video coding

An apparatus for processing video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:

• determining, for a conversion between a coding block split from a video unit of a video based on tree partitioning structure being used for the video unit and a bitstream of the video, whether a first coding mode is applied to the coding block, wherein, for an encoding operation, the first coding mode converts visual signals from a first color domain to a second color domain, or for a decoding operation, the first coding mode converts the visual signals from the second color domain to the first color domain;
• and
• performing the conversion based on the determining,
• wherein when the first coding mode is enabled for the coding block, a second coding mode is disabled for the coding block, and wherein the second coding mode splits the coding block into multiple sub-regions, and the multiple sub-regions share a same intra mode.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• determining, for a conversion between a coding block split from a video unit of a video based on tree partitioning structure being used for the video unit and a bitstream of the video, whether a first coding mode is applied to the coding block, wherein, for an encoding operation, the first coding mode converts visual signals from a first color domain to a second color domain, or for a decoding operation, the first coding mode converts the visual signals from the second color domain to the first color domain;
• and
• performing the conversion based on the determining,
• wherein when the first coding mode is enabled for the coding block, a second coding mode is disabled for the coding block, and wherein the second coding mode splits the coding block into multiple sub-regions, and the multiple sub-regions share a same intra mode.

A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:

• determining, for a conversion between a coding block split from a video unit of a video based on tree partitioning structure being used for the video unit and a bitstream of the video, whether a first coding mode is applied to the coding block, for an encoding operation, the first coding mode converts visual signals from a first color domain to a second color domain, or for a decoding operation, the first coding mode converts the visual signals from the second color domain to the first color domain;
• and
• generating the bitstream based on the determining,
• wherein when the first coding mode is enabled for the coding block, a second coding mode is disabled for the coding block, and wherein the second coding mode splits the coding block into multiple sub-regions, and the multiple sub-regions share a same intra mode.