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    Constraints on signaling of video layers in coded bitstreams
    174.
    发明授权
    Constraints on signaling of video layers in coded bitstreams 有权

    公开(公告)号：US11831894B2

    公开(公告)日：2023-11-28

    申请号：US17845536

    申请日：2022-06-21

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/105 ,  H04N19/46 ,  H04N19/70 ,  H04N19/187

    CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/187 ,  H04N19/46

    Abstract: A method of video processing includes performing a conversion between a video comprising a plurality of video layers and a bitstream of the video, wherein the bitstream comprises a plurality of output layer sets (OLSs), each of which comprises one or more of the plurality of video layers, and the bitstream conforms to a format rule, wherein the format rule specifies that, for a layer i, where i is an integer, the bitstream includes a set of first syntax element indicative of a first variable indicating whether the layer i is included in at least one of the plurality of OLSs.

    Constraints of slice count in a coded video picture
    175.
    发明授权
    Constraints of slice count in a coded video picture 有权

    公开(公告)号：US11825105B2

    公开(公告)日：2023-11-21

    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.

    Techniques for generation of a conformant output sub-bitstream
    176.
    发明授权
    Techniques for generation of a conformant output sub-bitstream 有权

    公开(公告)号：US11825102B2

    公开(公告)日：2023-11-21

    申请号：US17992176

    申请日：2022-11-22

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/169 ,  H04N19/172 ,  H04N19/31 ,  H04N19/70

    CPC classification number: H04N19/188 ,  H04N19/172 ,  H04N19/31 ,  H04N19/70

    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 including multiple layers and a bitstream of the video according to a rule, wherein the rule specifies that, in a first process of sub-bitstream extraction to output a first output sub-bitstream, the first output sub-bitstream is extracted without removing network abstraction layer (NAL) units of a particular type and having a particular NAL unit header identifier value, and wherein the particular type includes an access unit delimiter (AUD) NAL unit.

    Signaling of picture information in access units
    177.
    发明授权
    Signaling of picture information in access units 有权

    公开(公告)号：US11818381B2

    公开(公告)日：2023-11-14

    申请号：US17990945

    申请日：2022-11-21

    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 ,  H04N19/188 ,  H04N19/423 ,  H04N19/70

    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, wherein the bitstream conforms to a format rule, wherein the format rule specifies that a flag and a syntax element, when included in the bitstream, are access unit (AU) specific, and wherein 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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