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    INITIALIZATION OF PALETTE FOR WAVEFRONT PARALLEL PROCESSING
    153.
    发明申请
    INITIALIZATION OF PALETTE FOR WAVEFRONT PARALLEL PROCESSING 有权

    公开(公告)号：US20220201311A1

    公开(公告)日：2022-06-23

    申请号：US17693081

    申请日：2022-03-11

    Applicant: Bytedance Inc.

    Inventor： Li ZHANG ,  Weijia ZHU ,  Jizheng XU

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/169 ,  H04N19/46

    Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in a video unit of a video and a coded representation of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, a predictor palette is used for predicting the palette of representative sample values. The predictor palette is re-initialized upon a condition being satisfied. The condition is satisfied in case the video unit is a first video unit in a video unit row and a syntax element is included in the coded representation indicating that a wavefront parallel processing is enabled for the video unit.

    WEIGHTED SAMPLE BI-PREDICTION IN VIDEO CODING
    154.
    发明申请
    WEIGHTED SAMPLE BI-PREDICTION IN VIDEO CODING 有权

    公开(公告)号：US20220201310A1

    公开(公告)日：2022-06-23

    申请号：US17691910

    申请日：2022-03-10

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

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

    IPC: H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

    Abstract: A method of video processing is described. The method includes: deriving, for a conversion between a current block of a video and a coded representation of the video, a prediction block for the current block that is determined according to a tool in which weights are used to determine a weighted sum of two initial prediction blocks used to determine the prediction block; and performing the conversion using the prediction block; wherein the deriving includes: applying the weights to two intermediate prediction samples that respectively belong to the two initial prediction blocks to derive a final prediction sample; and performing a right shift operation for the final prediction sample, wherein the right shift operation is pbSample>> (shift1+3)), wherein pbSample represents the final prediction sample, shift1 is set equal to Max(2, 14−bitDepth); and determining the prediction block based on the final prediction sample.

    POSITION-BASED COEFFICIENTS SCALING
    156.
    发明申请
    POSITION-BASED COEFFICIENTS SCALING 有权

    公开(公告)号：US20220174299A1

    公开(公告)日：2022-06-02

    申请号：US17675880

    申请日：2022-02-18

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

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

    IPC: H04N19/33 ,  H04N19/176 ,  H04N19/18

    Abstract: A video processing method includes determining, according to a rule, whether to apply a scaling matrix based on whether a secondary transform matrix is applied to a portion of a video block of a video, wherein the scaling matrix is used to scale at least some coefficients of the video block, and wherein the secondary transform matrix is used to transform at least some residual coefficients of the portion of the video block during the conversion; and performing a conversion between the video block of the video and a bitstream representation of the video using the selected scaling matrix.

    WEIGHTING FACTORS FOR PREDICTION SAMPLE FILTERING IN INTRA MODE
    158.
    发明申请
    WEIGHTING FACTORS FOR PREDICTION SAMPLE FILTERING IN INTRA MODE 有权

    公开(公告)号：US20220159242A1

    公开(公告)日：2022-05-19

    申请号：US17587875

    申请日：2022-01-28

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

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

    IPC: H04N19/105 ,  H04N19/117 ,  H04N19/196 ,  H04N19/167 ,  H04N19/176

    Abstract: A video processing method is provided to include: deriving weighting factors for neighboring samples of samples of a current video block of a video according to a rule; and performing a conversion between the current video block and a coded representation of the video, and wherein the rule specifies that, in case that the current video block is coded using a planar mode or a DC mode, the weighting factors are determined from at least one of a dimension of the current video block or positions of the samples of the current video block, wherein the current video block uses a PDPC method that combines the neighboring samples with a prediction signal of the current video block to generate a refined prediction signal, and wherein a weighting factor of a prediction signal of a sample is determined based on weighting factors of corresponding neighboring samples of the sample.

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