Transform bypass coded residual blocks in digital video

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:

• determine, for a conversion between a current video block of a video and a bitstream of the video, that a transform skip mode is applied to a residual block of the current video block, wherein a sample of the residual block represents a prediction residual between a sample of the current video block and a prediction sample corresponding to the sample of the current video block, and in the transform skip mode, a transform operation or an inverse transform operation is skipped for the prediction residual;
• and
• perform the conversion based on the determining,
• wherein the residual block is coded in the bitstream as a plurality of regions, each region represents a portion of the residual block, and wherein the residual block has a size K*L, K and L are integers, and a size Ki*Li of an i-th region of the plurality of regions is based on the size of the residual block.

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

• determine, for a conversion between a current video block of a video and a bitstream of the video, that a transform skip mode is applied to a residual block of the current video block, wherein a sample of the residual block represents a prediction residual between a sample of the current video block and a prediction sample corresponding to the sample of the current video block, and in the transform skip mode, a transform operation or an inverse transform operation is skipped for the prediction residual;
• and
• perform the conversion based on the determining,
• wherein the residual block is coded in the bitstream as a plurality of regions, each region represents a portion of the residual block, and wherein the residual block has a size K*L, K and L are integers, and a size Ki*Li of an i-th region of the plurality of regions is based on the size of the residual block.

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 that a transform skip mode is applied to a residual block of a current video block of the video, wherein a sample of the residual block represents a prediction residual between a sample of the current video block and a prediction sample corresponding to the sample of the current video block, and in the transform skip mode, a transform operation or an inverse transform operation is skipped for the prediction residual;
• and
• generating the bitstream of the video based on the determining,
• wherein the residual block is coded in the bitstream as a plurality of regions, each region represents a portion of the residual block, and wherein the residual block has a size K*L, K and L are integers, and a size Ki*Li of an i-th region of the plurality of regions is based on the size of the residual block.