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    Constraints On Decoding Picture Buffer
    51.
    发明公开
    Constraints On Decoding Picture Buffer 审中-公开

    公开(公告)号：US20240107041A1

    公开(公告)日：2024-03-28

    申请号：US18525428

    申请日：2023-11-30

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/423 ,  H04N19/105 ,  H04N19/132 ,  H04N19/152 ,  H04N19/174

    CPC classification number: H04N19/423 ,  H04N19/105 ,  H04N19/132 ,  H04N19/152 ,  H04N19/174

    Abstract: Methods, systems and devices for implementing constraints used in video encoding and video decoding are described. An example method of video processing includes performing a conversion between a video comprising one or more pictures comprising one or more slices and a bitstream of the video. The conversion conforms to a rule, and the bitstream is organized into one or more access units. The rule specifies a constraint on a number of decoded pictures stored in a decoded picture buffer (DPB). Each decoded picture of the decoded pictures is (i) marked as used for reference, (ii) has a flag indicative of the decoded picture being output, and (iii) has an output time later than a decoding time of a current picture.

    Identification Of Inter-Layer Reference Pictures In Coded Video
    55.
    发明公开
    Identification Of Inter-Layer Reference Pictures In Coded Video 审中-公开

    公开(公告)号：US20240080492A1

    公开(公告)日：2024-03-07

    申请号：US18510089

    申请日：2023-11-15

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Li Zhang

    IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172 ,  H04N19/46

    CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/188 ,  H04N19/46

    Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video and a bitstream of the video according to a rule. At least one of the one or more parameter sets of the bitstream includes a general syntax structure including timing and hypothetical reference decoder (HRD) parameters. The rule specifies that a first syntax flag is not included in the general syntax structure in response to (1) a second syntax flag specifying that network abstraction layer (NAL) HRD parameters are not present in the general syntax structure, and (2) a third syntax flag specifying that video coding layer (VCL) HRD parameters are not present in the general syntax structure, where the first syntax flag specifies that same picture-level timing information applies to all output layer sets in the bitstream.

    Constraints of slice count in a coded video picture
    57.
    发明授权
    Constraints of slice count in a coded video picture 有权

    公开(公告)号：US11917172B2

    公开(公告)日：2024-02-27

    申请号：US18076886

    申请日：2022-12-07

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/423 ,  H04N19/132 ,  H04N19/174 ,  H04N19/105 ,  H04N19/152

    CPC classification number: H04N19/423 ,  H04N19/105 ,  H04N19/132 ,  H04N19/152 ,  H04N19/174

    Abstract: Methods, systems and devices for implementing constraints used in video encoding and video decoding are described. An example method of video processing includes performing a conversion between a video including one or more pictures including one or more slices and a bitstream of the video, wherein the bitstream is organized into a plurality of access units (AUs), AU 0 to AU n, based on a format rule, where n is a positive integer, wherein the format rule specifies a relationship between removal times of each of the plurality of AUs from a coded picture buffer (CPB) during decoding and a number of slices in the each of the plurality of AUs.

    SIGNALLING OF PICTURE INFORMATION IN ACCESS UNITS
    59.
    发明公开
    SIGNALLING OF PICTURE INFORMATION IN ACCESS UNITS 审中-公开

    公开(公告)号：US20240040138A1

    公开(公告)日：2024-02-01

    申请号：US18479946

    申请日：2023-10-03

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/70 ,  H04N19/169 ,  H04N19/423

    CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/70 ,  H04N19/188 ,  H04N19/423

    Abstract: Methods, systems, and devices for signaling picture information in access units in video bitstream processing are disclosed. An example method of video processing includes performing a conversion between a video comprising one or more pictures and a bitstream of the video. The bitstream conforms to a format rule, which specifies that a flag and a syntax element, when included in the bitstream, are access unit (AU) specific. The flag indicates, in response to a current AU not being a first AU in the bitstream in a decoding order, whether a nominal coded picture buffer (CPB) removal time of the current AU is determined relative to (a) a nominal CPB removal time of a previous AU associated with a buffering period supplemental enhancement information (SEI) message, or (b) a nominal CPB removal time of the current AU.

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