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    CONSTRAINTS ON QUANTIZED RESIDUAL DIFFERENTIAL PULSE CODE MODULATION REPRESENTATION OF CODED VIDEO
    171.
    发明申请
    CONSTRAINTS ON QUANTIZED RESIDUAL DIFFERENTIAL PULSE CODE MODULATION REPRESENTATION OF CODED VIDEO 有权

    公开(公告)号：US20210385442A1

    公开(公告)日：2021-12-09

    申请号：US17411333

    申请日：2021-08-25

    Applicant: Bytedance Inc.

    Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Hsiao Chiang CHUANG

    IPC: H04N19/11 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/593 ,  H04N19/70 ,  H04N19/124

    Abstract: Video coding and decoding methods are described. In example method includes determining that a differential coding mode is applicable to a conversion between a current video block of a video and a bitstream representation of the current video block, and performing, based on the determining, the conversion between the current video block and the bitstream representation of the current video block using the differential coding mode according to an implementation rule, where, in the differential coding mode, the current video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual, and where, in the differential coding mode, the difference between the quantized residual and the prediction of the quantized residual is represented using a differential pulse coding modulation (DPCM) representation.

    CHROMA CODING MODE DETERMINATION BASED ON MATRIX-BASED INTRA PREDICTION
    176.
    发明申请
    CHROMA CODING MODE DETERMINATION BASED ON MATRIX-BASED INTRA PREDICTION 有权

    公开(公告)号：US20210329248A1

    公开(公告)日：2021-10-21

    申请号：US17343980

    申请日：2021-06-10

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

    Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

    IPC: H04N19/132 ,  H04N19/159 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

    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 first determination that a luma video block of a video is coded using a matrix based intra prediction (MIP) mode in which a prediction block of the luma 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 selectively followed by an upsampling operation, performing, based on the first determination, a second determination about a chroma intra mode to be used for a chroma video block associated with the luma video block, and performing, based on the second determination, a conversion between the chroma video block and a bitstream representation of the chroma video block.

    MODIFIED HISTORY BASED MOTION PREDICTION
    177.
    发明申请
    MODIFIED HISTORY BASED MOTION PREDICTION 有权

    公开(公告)号：US20210321092A1

    公开(公告)日：2021-10-14

    申请号：US17358568

    申请日：2021-06-25

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

    Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

    Abstract: Devices, systems and methods for digital video coding, which includes using default motion candidates for video coding, are described. An exemplary method for video processing includes inserting, for a conversion between a block of a video and a bitstream representation of the video, at least one past motion candidate in a table of past motion candidates to a motion candidate list. The table of past motion candidates is derived based on past conversions. The method includes determining, after the at least one past motion candidate is inserted, that a motion candidate is not to be added to the motion candidate list. The motion candidate is derived based on the table of past motion candidates. The method also includes performing the conversion based on the motion candidate list.

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