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    CONSTRAINTS OF SLICE COUNT IN A CODED VIDEO PICTURE
    241.
    发明申请
    CONSTRAINTS OF SLICE COUNT IN A CODED VIDEO PICTURE 有权

    公开(公告)号：US20230103059A1

    公开(公告)日：2023-03-30

    申请号：US18076886

    申请日：2022-12-07

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/423 ,  H04N19/132 ,  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.

    VIDEO PARAMETER SET CONSTRAINTS FOR SUBPICTURE SUB-BITSTREAM EXTRACTION
    242.
    发明申请
    VIDEO PARAMETER SET CONSTRAINTS FOR SUBPICTURE SUB-BITSTREAM EXTRACTION 有权

    公开(公告)号：US20230095312A1

    公开(公告)日：2023-03-30

    申请号：US18077823

    申请日：2022-12-08

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

    IPC: H04N19/184 ,  H04N19/30 ,  H04N19/70 ,  H04N19/182 ,  H04N19/597

    Abstract: A method of processing video data includes performing a conversion between a video and a bitstream of the video. The bitstream includes one or more layers including one or more sublayers including one or more pictures including one or more subpictures according to a rule that specifies a rewriting operation selectively performed on one or more syntax structures during a subpicture sub-bitstream extraction process by which an output target sub-bitstream is extracted from the bitstream. The one or more syntax elements include information of the output target sub-bitstream.

    Matrix-based intra prediction using upsampling
    243.
    发明授权
    Matrix-based intra prediction using upsampling 有权

    公开(公告)号：US11616957B2

    公开(公告)日：2023-03-28

    申请号：US17479360

    申请日：2021-09-20

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Zhipin Deng ,  Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  G06F7/78 ,  G06F17/16

    Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and followed by an upsampling operation, where the upsampling operation is performed, in both a vertical direction and a horizontal direction in a fixed order, on samples obtained from the matrix vector multiplication operation.

    FILTER PARAMETER SIGNALING IN VIDEO PICTURE HEADERS
    244.
    发明申请
    FILTER PARAMETER SIGNALING IN VIDEO PICTURE HEADERS 有权

    公开(公告)号：US20230090012A1

    公开(公告)日：2023-03-23

    申请号：US17977492

    申请日：2022-10-31

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang ,  Jizheng Xu

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

    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.

    TECHNIQUES FOR GENERATION OF A CONFORMANT OUTPUT SUB-BITSTREAM
    248.
    发明申请
    TECHNIQUES FOR GENERATION OF A CONFORMANT OUTPUT SUB-BITSTREAM 有权

    公开(公告)号：US20230079188A1

    公开(公告)日：2023-03-16

    申请号：US17992176

    申请日：2022-11-22

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

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

    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 PICTURE ORDER COUNT IN VIDEO BITSTREAMS
    249.
    发明申请
    CODING OF PICTURE ORDER COUNT IN VIDEO BITSTREAMS 有权

    公开(公告)号：US20230077443A1

    公开(公告)日：2023-03-16

    申请号：US17990932

    申请日：2022-11-21

    Applicant: Bytedance Inc.

    Inventor： Ye-kui Wang

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

    Abstract: Methods, systems and devices for coding the picture order count in video bitstream processing. 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 derivation of a picture associated with a first flag and in a decoding process for a picture order count is based on a second flag, wherein the picture associated with the first flag is a previous picture in a decoding order that has (i) a first identifier that is the same as a slice or picture header referring to a reference picture list syntax structure, (ii) a second identifier and the second flag being equal to zero, and (iii) a picture type different from a random access skipped leading picture and a random access decodable leading picture.

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