JPWO2021252453A5

JPWO2021252453A5 -

Info

Publication number: JPWO2021252453A5
Application number: JP2022575425A
Authority: JP
Publication date: 2024-02-20

Claims

A method of processing video data, the method comprising:
converting between a video and a bitstream of the video;
During said conversion, one or more syntax elements included in a scalable nesting supplemental enhancement information (SEI) message conform to formatting rules;
The formatting rule specifies that the one or more syntax elements are used to indicate subpicture information of a plurality of subpicture layers, which is a layer of a video having a picture with a plurality of subpictures ;
the one or more syntax elements include a first syntax element;
the value of the first syntax element plus one defines the number of subpictures of each picture of the plurality of subpicture layers;
the first syntax element is labeled as sn_num_subpics_minus1;
Method.

the value of the first syntax element is less than or equal to the value of a second syntax element of a sequence parameter set referenced by pictures of the plurality of subpicture layers;
the value of the second syntax element plus one specifies the number of subpictures of each picture that refer to the sequence parameter set;
The method according to claim 1 .

the one or more syntactic elements include a third syntactic element;
the third syntax element indicates an i-th subpicture identifier in each picture of the plurality of subpicture layers;
The method according to claim 1 .

A scalable nested SEI message is not included in multiple subpicture layers, but is included in a layer within a particular output layer set (OLS) to which the scalable nested SEI message is applied, or a layer in a particular output layer set (OLS) to which the scalable nested SEI message is applied. layer within a particular layer,
The method according to claim 1 .

the formatting rules do not allow one or more SEI messages with filler payloads to be included in the scalable nesting SEI message;
The method according to claim 1 .

the one or more SEI messages have a payload type value equal to 3;
The method according to claim 1 .

the formatting rules do not allow one or more second SEI messages with scalable nesting with a payload type value equal to 133 to be included in the scalable nesting SEI message;
The method according to claim 1 .

performing the conversion includes encoding the video into the bitstream;
The method according to claim 1 .

performing the conversion includes decoding the video from the bitstream;
The method according to claim 1 .

An apparatus for processing video data comprising a processing unit and a non-transitory memory having instructions, the apparatus comprising:
The instruction, when executed by the processing device, causes the processing device to:
converting a video and a bitstream of the video;
During said conversion, one or more syntax elements included in a scalable nesting supplemental enhancement information (SEI) message conform to formatting rules;
The formatting rule specifies that the one or more syntax elements are used to indicate subpicture information of a plurality of subpicture layers, which is a layer of a video having a picture with a plurality of subpictures ;
the one or more syntax elements include a first syntax element;
the value of the first syntax element plus one defines the number of subpictures of each picture of the plurality of subpicture layers;
the first syntax element is labeled as sn_num_subpics_minus1;
Device.

A non-transitory computer-readable storage medium storing instructions, the medium comprising:
The instructions cause the processing device to:
converting a video and a bitstream of the video;
During said conversion, one or more syntax elements included in a scalable nesting supplemental enhancement information (SEI) message conform to formatting rules;
The formatting rule specifies that the one or more syntax elements are used to indicate subpicture information of a plurality of subpicture layers, which is a layer of a video having a picture with a plurality of subpictures ;
the one or more syntax elements include a first syntax element;
the value of the first syntax element plus one defines the number of subpictures of each picture of the plurality of subpicture layers;
the first syntax element is labeled as sn_num_subpics_minus1;
Non-transitory computer-readable storage medium.

A non-transitory computer-readable recording medium for storing a video bitstream generated by a method performed by a video processing device, the storage medium comprising:
The method includes:
generating the bitstream of the video;
During said conversion, one or more syntax elements included in a scalable nesting supplemental enhancement information (SEI) message conform to formatting rules;
The formatting rule specifies that the one or more syntax elements are used to indicate subpicture information of a plurality of subpicture layers, which is a layer of a video having a picture with a plurality of subpictures ;
the one or more syntax elements include a first syntax element;
the value of the first syntax element plus one defines the number of subpictures of each picture of the plurality of subpicture layers;
the first syntax element is labeled as sn_num_subpics_minus1;
Non-transitory computer-readable storage medium .