Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes processing circuitry. The processing circuitry determines that a non-interleaved separate tree structure is used for coding different color components of coding tree units (CTUs) in a bitstream. The processing circuitry decodes a first color component of a plurality of CTUs from a first portion of the bitstream, and decodes a second color component of the plurality of CTUs from a second portion of the bitstream, the second portion is located after the first portion in the bitstream.

A computer-implemented method is provided. The method includes executing a video game on a server unit and said server unit producing uncompressed interactive video. The method includes processing the uncompressed interactive video at a compression unit associated with the server unit. The compression unit outputting compressed interactive video, and the server unit and the compression unit being located at a data center. The method includes streaming the compressed interactive video over a packetized network from the data center to one or more client devices associated with one or more users. Each client device is located geographically remote to the data center, and the server is configured to receive input to drive gameplay of the video game by said one or more client devices. The compressed interactive video is configured for decompression and presentation at said one or more client devices. The method includes receiving, by the server, updates from said one or more clients devices regarding a quality of said uncompressed interactive video that is received from said streaming. The method includes adjusting automatically, by the compression unit, a rate of compression provided to one or more of said client devices based on said updates received regarding the quality of said uncompressed interactive video for the video game.

A computer-implemented method is provided. The method includes executing a video game on a server unit and said server unit producing uncompressed interactive video. The method includes processing the uncompressed interactive video at a compression unit associated with the server unit. The compression unit outputting compressed interactive video, and the server unit and the compression unit being located at a data center. The method includes streaming the compressed interactive video over a packetized network from the data center to one or more client devices associated with one or more users. Each client device is located geographically remote to the data center, and the server is configured to receive input to drive gameplay of the video game by said one or more client devices. The compressed interactive video is configured for decompression and presentation at said one or more client devices. The method includes receiving, by the server, updates from said one or more clients devices regarding a quality of said uncompressed interactive video that is received from said streaming. The method includes adjusting automatically, by the compression unit, a rate of compression provided to one or more of said client devices based on said updates received regarding the quality of said uncompressed interactive video for the video game.

Systems, methods and apparatus for encoding, decoding or transcoding digital video are described. One example method of video processing includes performing a conversion between a video and a bitstream of the video including multiple layers, wherein the bitstream includes a plurality of supplemental enhancement information, SEI, messages associated with an access unit, AU, or a decoding unit, DU, of a particular output layer set, OLS, or a particular layer, wherein the plurality of SEI messages, including a message type different from scalable nesting type, is based on a format rule, and wherein the format rule specifies that each of the plurality of SEI messages has a same SEI payload content due to the plurality of SEI messages being associated with the AU or the DU of the particular OLS or the particular layer.

A method of encoding a video bitstream implemented by a video encoder is disclosed. The method includes storing, in a memory of the video encoder, a set of less than five network abstraction layer (NAL) unit types available for video data; selecting, by a processor of the video encoder, a NAL unit type from the set of less than five NAL unit types for a picture from the video data; generating, by the processor of the video encoder, a video bitstream containing a NAL unit corresponding to the NAL unit type selected and containing an identifier identifying the NAL unit type selected; and transmitting, by a transmitter of the video encoder, the video bitstream toward a video decoder. A corresponding method of decoding the video bitstream is also disclosed.

A visual media processing method includes performing a conversion between a current video block of a visual media data and a bitstream representation of the current video block. The bitstream representation is configured according to a format rule that specifies that a syntax element is selectively included or excluded in the bitstream representation indicative of a maximum number of merge candidates for a coding tool, thereby indicating whether the coding tool is enabled or disabled for the conversion. The maximum number of merge candidates for the coding tool is zero or a positive number.

An example device for decoding video data, the device including a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that adaptive loop filter (ALF) information can be present in a picture header of a picture of the video data and cannot be present in a slice header; in response to determining that the ALF information can be present in the picture header and cannot be present in the slice header, determine that a picture header syntax structure is not present in the slice header (e.g., without decoding data representing a value for a syntax element indicating whether the picture header syntax structure is present in the slice header); and decode the picture according to the determination that the picture header syntax structure is not present in the slice header.

A method of decoding an encoded video bitstream using at least one processor includes obtaining a video coding layer (VCL) network abstraction layer (NAL) unit; determining whether the VCL NAL unit is a first VCL NAL unit of a picture unit (PU) containing the VCL NAL unit; based on determining that the VCL NAL unit is the first VCL NAL unit of the PU, determining whether the VCL NAL unit is a first VCL NAL unit of an access unit (AU) containing the PU; and based on determining that the VCL NAL unit is the first VCL NAL unit of the AU, decoding the AU based on the VCL NAL unit.

This disclosure relates to video coding and more particularly to techniques for signaling picture timing and decoding unit information for coded video. According to an aspect of an invention, a flag syntax element, specifying whether decoding unit level decoded picture buffer output delay parameters are present in a picture timing message, in a buffering period message is parsed and a first syntax element, used to compute a decoded picture buffer output time, in the picture timing message is parsed, in a case that a value of the flag syntax element is equal to one.

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.