A method of point cloud coding (PCC) implemented by a video decoder. The method includes receiving an encoded bitstream including a group of frames header disposed outside a coded representation of a texture component or a geometry component and identifying a video codec used for coding the texture component or the geometry component, and decoding the encoded bitstream.

A method of point cloud coding (PCC) implemented by a video decoder. The method includes receiving an encoded bitstream including a group of frames header disposed outside a coded representation of a texture component or a geometry component and identifying a video codec used for coding the texture component or the geometry component, and decoding the encoded bitstream.

A video codec can involve encoding and decoding picture information and first and second flags, wherein the encoding or decoding of the picture information is based on a coding mode indicated by the first flag or the second flag, and the first flag indicates a subblock merge mode and the second flag indicates an inter affine prediction mode, and the encoding or decoding of the first flag uses CABAC coding based on a first probability model and encoding or decoding of the second flag uses CABAC coding based on a second probability model.

A video processing method includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether to enable a level mapping operation or a level remapping operation based on a rule, wherein the level mapping operation or the level remapping operation includes changing between a first representation of a residual coefficient of the current block and a second representation of the residual coefficient of the current block based on neighboring residual coefficients of the residual coefficient; and performing the conversion by selectively using the level mapping operation or the level remapping operation based on the determining.

A device for processing video data can be configured to receive a configuration record for decoding a bitstream of the video data, wherein the configuration record for the bitstream includes a toolset indication syntax element that includes information identifying, from a set of video decoding tools, tools that are required to decode the bitstream associated with the configuration record; based on the toolset indication syntax element, determine whether to retrieve the bitstream associated with the configuration record; and based on the determination to retrieve the bitstream associated with the configuration record, retrieve the bitstream and outputting the bitstream to a video decoder for decoding.

A decoder includes circuitry configured to receive a bitstream identify, in the bitstream, a current frame, wherein the current frame includes a first region and a third region, detect, in the bitstream, an indication that the first region is encoded according to a lossless encoding protocol, and decode the current frame, wherein decoding the current frame further comprises decoding the first region using a lossless decoding protocol corresponding to the lossless encoding protocol.

Methods and apparatus for processing of video are described. The processing may include video encoding, decoding or transcoding. One example video processing method includes performing a conversion between a video including one or more pictures including one or more subpictures and a bitstream of the video, wherein the bitstream conforms to a format rule that specifies a syntax of network abstraction layer (NAL) units in the bitstream, and wherein the format rule specifies that a NAL unit of a video coding layer (VCL) NAL unit type includes a content associated with a particular type of picture or a particular type of subpicture.

Disclosed is an image data encoding/decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format.

Disclosed is an image data encoding/decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format.

A method for video coding in an encoder is provided. A first intra prediction mode in a first set of intra prediction modes for a non-square block is determined. The first set of intra prediction modes includes a specific number of wide angle intra prediction modes that are not in a second set of intra prediction modes for a square block, and the first set of intra prediction modes does not include a specific number of missing intra prediction modes that are in the second set of intra prediction modes. A first block is coded according to the first intra prediction mode. The specific numbers of the wide angle intra prediction modes and the missing intra prediction modes are a function of an aspect ratio of the first block, the second set of intra prediction modes includes directional modes from a bottom-left diagonal mode to a top-right diagonal mode.