Abstract: Embodiments of the present disclosure provide a solution for video processing. In some embodiments, a method for video processing is proposed, which comprises: reordering at least one intra string copy (ISC) reference string, the at least one ISC reference string matching with at least one string of a block of a video; reconstructing the block based on the reordered at least one ISC reference string; and performing a conversion between the reconstructed block and a bitstream of the video. The proposed method can advantageously improve the coding efficiency.

Abstract: Methods, system and apparatus for video processing are described. One example method of processing video data includes performing a conversion between a current block of a video and a bitstream of the video. Samples of the current block are represented in the bitstream using coefficients that are arranged according to a rule responsive to locations of the samples of the current block.

Abstract: Methods, system and apparatus for video processing are described. One example method of processing video data includes performing a conversion between a current block of a video and a bitstream of the video according to a rule. The rule specifies that whether a transform skip mode is enabled is determined based on coding information of the current block. The transform skip mode is a coding mode in which a transform is skipped on a prediction residual of a video block.

Abstract: Methods, system and apparatus for video processing are described. One example method of processing video data includes performing a conversion between a current block of a video and a bitstream of the video according to a rule. The rule specifies that coded information of the current block determines usage of coefficient reordering by which coefficients of the current block parsed from the bitstream are reordered prior to applying a dequantization process, an inverse transform process, or a reconstruction process.

Abstract: Methods, system and apparatus for video processing are described. One example video processing method includes determining, for a conversion between a current video block of a video and a bitstream of the video, a usage of an identity transform mode for the conversion of the current video block according to a rule. The rule specifies that the usage is based on representative coefficients of one or more representative blocks of the video. The method also includes performing the conversion based on the determining.