Method, apparatus, and medium for video processing

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 first prediction mode is applied to the current video block;
• reorder, in the first prediction mode, at least a first set of block vector difference (BVD) candidates of multiple BVD candidates corresponding to a first base candidate according to at least one criterion;
• derive, based on the reordered BVD candidates, a block vector for the current video block;
• and
• perform the conversion based on the block vector.

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 first prediction mode is applied to the current video block;
• reorder, in the first prediction mode, at least a first set of block vector difference (BVD) candidates of multiple BVD candidates corresponding to a first base candidate according to at least one criterion;
• derive, based on the reordered BVD candidates, a block vector for the current video block;
• and
• perform the conversion based on the block vector.

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 first prediction mode is applied to a current video block of the video;
• reordering, in the first prediction mode, at least a first set of block vector difference (BVD) candidates of multiple BVD candidates corresponding to a first base candidate according to at least one criterion;
• deriving, based on the reordered BVD candidates, a block vector for the current video block;
• and
• generating the bitstream based on the block vector.