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    Signalling of The Presence of Inter-Layer Reference Pictures
    141.
    发明申请
    Signalling of The Presence of Inter-Layer Reference Pictures 有权

    公开(公告)号：US20220377382A1

    公开(公告)日：2022-11-24

    申请号：US17860634

    申请日：2022-07-08

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Li Zhang ,  Kai Zhang

    IPC: H04N19/70 ,  H04N19/91

    Abstract: A method of video processing includes performing a conversion between a video including one or more pictures and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule conditionally allows coding of a picture in one layer using reference pictures from other layers based on a first syntax element indicating whether the reference pictures from the other layers are present in the bitstream, and wherein the first syntax element is conditionally signaled in the bitstream based on a second syntax element that indicates whether an identifier of a parameter set associated with the picture is not equal to zero.

    Techniques For Generation Of A Conformant Output Sub-Bitstream
    142.
    发明申请
    Techniques For Generation Of A Conformant Output Sub-Bitstream 有权

    公开(公告)号：US20250106411A1

    公开(公告)日：2025-03-27

    申请号：US18974195

    申请日：2024-12-09

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/169 ,  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.

    Coding of instantaneous decoding refresh subpictures
    143.
    发明授权
    Coding of instantaneous decoding refresh subpictures 有权

    公开(公告)号：US12238303B2

    公开(公告)日：2025-02-25

    申请号：US17964396

    申请日：2022-10-12

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Li Zhang ,  Kai Zhang

    IPC: H04N19/105 ,  G06T7/33 ,  G06T7/73 ,  H04N19/107 ,  H04N19/136 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/30 ,  H04N19/70

    Abstract: Methods and apparatus for video processing are described. The processing may include video encoding, video decoding, or video transcoding. An 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. The one or more pictures and/or the one or more subpictures are included into the bitstream according to an order rule. The order rule specifies a relationship between a position of a current instantaneous decoder refresh (IDR) picture or a current IDR subpicture in the bitstream with respect to another picture referred to by an entry in a reference picture list for a current slice of the current IDR picture or the current IDR subpicture.

    Signalling of weights of a reference picture list
    146.
    发明授权
    Signalling of weights of a reference picture list 有权

    公开(公告)号：US12041257B2

    公开(公告)日：2024-07-16

    申请号：US17889887

    申请日：2022-08-17

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Li Zhang

    IPC: H04N19/46 ,  H04N19/105 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/70

    CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/188 ,  H04N19/70

    Abstract: A method includes performing a conversion, according to a rule, between a current slice of a current picture of a video and a bitstream of the video, wherein the rule specifies that a first syntax element of a picture parameter set (PPS) and a second syntax element of the PPS control whether a third syntax element is included in the bitstream, and wherein the first syntax element indicates whether a weighted prediction is enabled for bi-directional slices of coded pictures referring to the PPS, the second syntax element indicates whether information related to the weighted prediction is present in picture headers or slice headers of coded pictures referring to the PPS, and the third syntax element indicates a number of weights associated with a reference picture list 1 of the current slice.

    Filter parameter signaling in video picture headers
    147.
    发明授权
    Filter parameter signaling in video picture headers 有权

    公开(公告)号：US11997318B2

    公开(公告)日：2024-05-28

    申请号：US17977492

    申请日：2022-10-31

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Jizheng Xu

    IPC: H04N19/00 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/86

    CPC classification number: H04N19/86 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

    Abstract: Methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example video processing method includes performing a conversion between a video picture of a video and a bitstream of the video. A first syntax element in a first video unit level specifying a deblocking parameter offset for β divided by 2 applied to a chroma component for one or more slices in a first video unit and a second syntax element in the first video unit level specifying a deblocking parameter offset for tC divided by 2 applied to the chroma component for the one or more slices in the first video unit are determined according to a rule in response to the first syntax element and the second syntax element not included in the bitstream.

    Signaling of coded picture buffer information in video bitstreams
    149.
    发明授权
    Signaling of coded picture buffer information in video bitstreams 有权

    公开(公告)号：US11973968B2

    公开(公告)日：2024-04-30

    申请号：US17990959

    申请日：2022-11-21

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

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

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

    Abstract: Methods, systems and devices for signaling of coded buffer picture information 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 first syntax element, when included in the bitstream, is access unit (AU) specific, wherein the value of the first syntax element is based on whether an associated AU is an intra random access points (IRAP) AU or a gradual decoding refresh (GDR) AU, and wherein the value of the first syntax element specifies (i) whether a second syntax element is present in a buffering period supplemental enhancement information (SEI) message, and (ii) whether alternative timing information is present in a picture timing SEI message in a current buffering period.

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