Mode dependent motion vector difference precision set

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

• determine a coding mode of a current block, wherein the coding mode of the current block is an affine mode or an intra-block copy (IBC) mode;
• determine, for motion information of the current block, a motion precision from a motion precision set comprising multiple motion precisions;
• wherein the motion precision set is based on the coding mode;
• and
• perform a conversion between the current block and a bitstream using the determined mode and the determined motion precision.

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

• determine a coding mode of a current block, wherein the coding mode of the current block is an affine mode or an intra-block copy (IBC) mode;
• determine, for motion information of the current block, a motion precision from a motion precision set comprising multiple motion precisions;
• wherein the motion precision set is based on the coding mode;
• and
• perform a conversion between the current block and a bitstream using the determined mode and the determined motion precision.

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 a coding mode of a current block, wherein the coding mode of the current block is an affine mode or an intra-block copy (IBC) mode;
• determining, for motion information of the current block, a motion precision from a motion precision set comprising multiple motion precisions;
• wherein the motion precision set is based on the coding mode;
• and
• generating the bitstream using the determined mode and the determined motion precision.