Abstract: Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding is proposed. The method comprises: performing a conversion between a current point cloud frame of a point cloud sequence and a bitstream of the point cloud sequence, a first slice in the current point cloud frame being directly depended upon by no more than a single dependent slice.

Abstract: A method of decoding is provided. The method includes receiving a sub-bitstream having a sequence parameter set (SPS) with a profile tier level (PTL) syntax structure for an output layer set (OLS) with only one layer; setting a number of layers in the OLS equal to one based on the OLS having the only one layer; obtaining the PTL syntax structure for the OLS with the only one layer from the SPS when the number of layers in the OLS has been set equal to one; and decoding a picture from the only one layer using the PTL syntax structure to obtain a decoded picture. A corresponding method of encoding is also provided.

Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: receiving, at a first device, a metadata file from a second device; and determining a descriptor in a data set in the metadata file, a presence of the descriptor indicating that a representation in the data set is an external stream representation (ESR).

Abstract: A mechanism for processing video data is disclosed. The mechanism includes determining that preprocessing information including properties or parameters of optimizing filters is included in a bitstream. A conversion is performed between a visual media data and a bitstream based on the preprocessing information.

Abstract: A method of decoding implemented by a video decoder is provided. The method includes receiving a bitstream including a sequence parameter set (SPS) containing a first flag and an indicator of a length of a picture order count (POC) most significant bits (MSB) value when present in a header referring to the SPS, where a value of the first flag specifies that a second flag is present in the header referring to the SPS, and where a value of the second flag specifies that the POC MSB value is present in the header; determining a POC value based on the POC MSB value; identifying a picture from the bitstream based on the POC value; and decoding the picture to obtain a decoded picture.

Abstract: A mechanism for processing video data is disclosed. The mechanism determining that a layer conforms to a Multiview Extended profile, which may also be referred to as an Extended Multiview Main profile. A conversion is performed between a visual media data and a bitstream based on the Multiview Extended profile.

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more output layer sets (OLSs). A video parameter set (VPS) specifying the OLS is also encoded into the bitstream. A set of bitstream conformance tests are performed at each operation point (OP) of each OLS, as specified by the VPS, to test each OP for conformance. The bitstream is stored for communication toward a decoder.

Abstract: A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), where any decoding capability information (DCI) network abstraction layer (NAL) unit, video parameter set (VPS) NAL unit, sequence parameter set (SPS) NAL unit, or picture parameter set (PPS) NAL unit referred to by the PU precedes a picture header (PH) NAL unit of the PU and a first video coding layer (VCL) NAL unit of the PU; and decoding a coded picture from the PU to obtain a decoded picture.

Abstract: A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes receiving, by a receiver of the video decoder, a mixed intra random access point (IRAP) picture including a first sub-picture and a second sub-picture, wherein the first sub-picture is an IRAP picture and the second sub-picture is a non-IRAP sub-picture; receiving, by the receiver; a reference picture list (RPL) for the mixed IRAP picture; decoding, by a processor of the video decoder, the second sub-picture using the RPL; and generating, by the processor, an image based on the second sub-picture as decoded. A corresponding encoding method is also provided.

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more layers of coded pictures. A video parameter set (VPS) is also encoded into the bitstream. The VPS includes an each layer is an output layer set (OLS) flag (each_layer_is_an_ols_flag) when all layers specified by the VPS are independently coded without inter-layer prediction. The each_layer_is_an_ols_flag specifies whether each OLS contains only one layer. The bitstream is stored for communication toward a decoder.

Abstract: A mechanism for processing video data is disclosed. One or more random access picture (RAP) picture identifiers are signaled for one or more Cross RAP Referencing (CRR) pictures. A conversion is performed between a visual media data and a bitstream based on the one or more RAP picture identifiers.

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a coded layer video sequence (CLVS) for a layer in a bitstream. A sequence parameter set (SPS) referred to by the CLVS is also encoded into the bitstream. The SPS is constrained to have a network abstraction layer (NAL) unit header layer identifier (nuh_layer_id) value equal to a nuh_layer_id value of the CLVS when the layer does not use inter-layer prediction. The bitstream is stored for communication toward a decoder.

Abstract: A method comprises obtaining media content associated with a first viewpoint and a second viewpoint, wherein a first position of the first viewpoint is static and a second position of the second viewpoint is dynamic; generating a first VWPT descriptor based on the media content and describing the first viewpoint; generating a second VWPT descriptor based on the media content and describing the second viewpoint; generating an MPD comprising the first VWPT descriptor and the second VWPT descriptor; and transmitting the MPD.

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding into a bitstream a gradual decoding refresh (GDR) access unit (AU) and a buffering period (BP) supplemental enhancement information (SEI) message associated with the GDR AU. A hypothetical reference decoder (HRD) is initialized based on the BP SEI message. A HRD conformance test is performed on the bitstream using the HRD. The bitstream is stored for communication toward a decoder.

Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a subpicture in a video picture of a video and a bitstream of the video according to a rule. The rule specifies that, in in case a subpicture is treated as a video picture for the conversion, a cross-layer alignment restriction is applied to less than all of the multiple layers including a current layer that includes the subpicture and a subset of layers associated with the current layer.

Abstract: Methods, apparatus and systems for processing video are described. One example method includes performing a conversion between a video comprising a video unit and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that a first syntax element indicating whether an in-loop filtering operation is performed across tile boundaries is selectively included in the bitstream responsive to whether or how the video unit is partitioned into tiles.

Abstract: A method comprises: receiving, by a video decoder, a video bitstream comprising an RPL flag, wherein the RPL flag equal to a first value specifies that RPL signaling is present in a PH, and wherein the RPL flag equal to a second value specifies that RPL signaling is not present in the PH and may be present in slice headers; and decoding, by the video decoder using the RPL flag, a coded picture to obtain a decoded picture. A comprises: receiving, by a video decoder, a video bitstream comprising an SAO flag, wherein the SAO flag specifies that SAO information may be present or is not present in a PH or specifies that the SAO information may be present or is not present in slice headers; and decoding, by the video decoder using the SAO flag, a coded picture to obtain a decoded picture.

Abstract: A method of decoding a coded video bitstream is provided. The method includes parsing a slice header of a current slice represented in the coded video bitstream. The slice header includes a reference picture list structure. The method also includes deriving, based on the reference picture list structure, a reference picture list of the current slice; and obtaining, based on the reference picture list, at least one reconstructed block of the current slice.

Abstract: A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes parsing a flag; parsing candidates for a first reference picture list structure; determining that candidates for a second reference picture list structure are not present in the coded video bitstream and inferring that the candidates for the second reference picture list structure are the same as the candidates for the first reference picture list structure when the flag has a first value; determining that the candidates for the second reference picture list structure are present in the coded video bitstream when the flag has a second value; generating a reference picture list using the candidates for the first reference picture list structure or the candidates for the second reference picture list structure; and performing inter-prediction based on the reference picture list to generate a reconstructed block.

Abstract: A method of decoding implemented by a video decoder is provided. The method includes receiving a bitstream including a coded video sequence start (CVSS) access unit (AU), wherein the CVSS AU contains a picture unit (PU) for each layer, and wherein a coded picture in each PU is a coded layer video sequence start (CLVSS) picture; identifying the coded picture from one of the layers based on a picture order count (POC) value; and decoding the coded picture to obtain a decoded picture.