A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.

A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.

A video decoding method includes: obtaining a bitstream including a plurality of coded frames of a video signal; decoding each of the plurality of coded frames into a plurality of super blocks and each of the plurality of super blocks into a plurality of residual blocks; recovering a coded block (CB) for each of the plurality of residual blocks based on multiple reference line intra prediction (MRLP) flags and reference samples included in each coded frame, wherein multiple reference lines are divided into above-side reference lines and left-side reference lines and one above-side reference line and one left-side reference line are selected for intra prediction; reconstructing each frame of the video signal by storing the recovered CB for each of the plurality of residual blocks in a frame buffer; and continuously outputting the reconstructed frames to restore the video signal.

A video decoding method includes: obtaining a bitstream including a plurality of coded frames of a video signal; decoding each of the plurality of coded frames into a plurality of super blocks and each of the plurality of super blocks into a plurality of residual blocks; recovering a coded block (CB) for each of the plurality of residual blocks based on multiple reference line intra prediction (MRLP) flags and reference samples included in each coded frame, wherein multiple reference lines are divided into above-side reference lines and left-side reference lines and one above-side reference line and one left-side reference line are selected for intra prediction; reconstructing each frame of the video signal by storing the recovered CB for each of the plurality of residual blocks in a frame buffer; and continuously outputting the reconstructed frames to restore the video signal.

A video processing method includes checking, during a conversion from a coded representation of a current video block to the current video block, a position of a last non-zero coefficient of the current video block, wherein the position is relative to a top-left position of the current video block; and performing a determination, based on the position, whether or not to parse a syntax element which signals a transform information in the coded representation.

A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.

A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.

Systems and methods for decoding a coded video stream are provided. A method includes receiving a coded video stream that includes an access unit, including a picture; signaling a first flag, in an access unit delimiter of the coded video stream, that indicates whether the access unit includes either or neither one from among an intra random access point (IRAP) picture and a gradual decoding refresh (GDR) picture; signaling a second flag, in a picture header of the coded video stream, that indicates whether the picture is the IRAP picture; and decoding the picture, as a current picture, based on the signaling of the first flag and the second flag, wherein a value of the first flag and a value of the second flag are aligned.

Systems and methods for decoding a coded video stream are provided. A method includes receiving a coded video stream that includes an access unit, including a picture; signaling a first flag, in an access unit delimiter of the coded video stream, that indicates whether the access unit includes either or neither one from among an intra random access point (IRAP) picture and a gradual decoding refresh (GDR) picture; signaling a second flag, in a picture header of the coded video stream, that indicates whether the picture is the IRAP picture; and decoding the picture, as a current picture, based on the signaling of the first flag and the second flag, wherein a value of the first flag and a value of the second flag are aligned.

Devices, systems and methods for digital video coding, which includes: determining whether a sample is located at sub-block transform boundaries in case that a sub-block transform is applied; applying deblocking filter process if it is determined that the sample is located at sub-block transform boundaries; and performing a conversion between the video and a bitstream representation of the video.