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    WEIGHTING PROCESSING OF COMBINED INTRA-INTER PREDICTION
    161.
    发明申请
    WEIGHTING PROCESSING OF COMBINED INTRA-INTER PREDICTION 有权

    公开(公告)号：US20220124349A1

    公开(公告)日：2022-04-21

    申请号：US17356220

    申请日：2021-06-23

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

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

    IPC: H04N19/159 ,  H04N19/176 ,  H04N19/126

    Abstract: The present application relates to improved weighting processing of combined intra-inter prediction. A method for processing video includes: determining, during a conversion between a current video block, which is coded in a combined intra and inter prediction (CIIP) mode, of a video and a bitstream representation of the current video block, a weight pair comprising a first weight for a first prediction result of the current video block and a second weight for a second prediction result of the current video block, based on one or more neighboring video blocks to the current video block, wherein the first prediction result is generated by an intra prediction mode and the second prediction result is generated by an inter prediction mode; and determining a prediction result of the current block based on a weighted sum of the first prediction result and the second prediction result.

    CALCULATION IN MATRIX-BASED INTRA PREDICTION
    162.
    发明申请
    CALCULATION IN MATRIX-BASED INTRA PREDICTION 有权

    公开(公告)号：US20220124342A1

    公开(公告)日：2022-04-21

    申请号：US17646412

    申请日：2021-12-29

    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 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/186

    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 selectively followed by an upsampling operation, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.

    SUB-TABLE FOR HISTORY-BASED AFFINE MODE
    165.
    发明申请
    SUB-TABLE FOR HISTORY-BASED AFFINE MODE 有权

    公开(公告)号：US20220086474A1

    公开(公告)日：2022-03-17

    申请号：US17406859

    申请日：2021-08-19

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

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

    IPC: H04N19/513 ,  H04N19/433

    Abstract: Sub-table for history-based affine mode is described. In an exemplary aspect, a method for video processing includes deriving, deriving, for a conversion between a current block of video and a bitstream representation of the current block, an affine model for the current block based on affine related information, wherein the affine related information is stored in at least one first affine history motion vector prediction (HMVP) buffer of M first affine HMVP buffers or at least one affine sub-buffer of M affine sub-buffers (HB0, HB1, . . . HBM−1) into which a second affine HMVP buffer is divided, wherein the first affine HMVP buffer or affine HMVP sub-buffer being used to store affine related information of blocks coded prior the current block, M being an integer larger than 1; and performing the conversion by using the derived affine model.

    TECHNIQUES FOR MODIFYING QUANTIZATION PARAMETER IN TRANSFORM SKIP MODE
    166.
    发明申请
    TECHNIQUES FOR MODIFYING QUANTIZATION PARAMETER IN TRANSFORM SKIP MODE 有权

    公开(公告)号：US20220078427A1

    公开(公告)日：2022-03-10

    申请号：US17528312

    申请日：2021-11-17

    Applicant: Bytedance Inc.

    Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

    IPC: H04N19/124 ,  H04N19/159 ,  H04N19/70 ,  H04N19/176

    Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video and a coded representation of the current video block according to a rule, wherein the rule specifies that, due to use of an identity transform coding tool for representing the current video block into the coded representation, a syntax field indicative of a quantization parameter used for decoding the current video block is included such that a value of the quantization parameter is modified according to a rule, wherein the identity transform coding tool allows coefficient values at a transform domain of the current block to be same as values of a residual block of the current video block.

    TRANSFORM BYPASS CODED RESIDUAL BLOCKS IN DIGITAL VIDEO
    167.
    发明申请
    TRANSFORM BYPASS CODED RESIDUAL BLOCKS IN DIGITAL VIDEO 有权

    公开(公告)号：US20220070465A1

    公开(公告)日：2022-03-03

    申请号：US17522387

    申请日：2021-11-09

    Applicant: Bytedance Inc.

    Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/70 ,  H04N19/176

    Abstract: Devices, systems and methods for transform design for large blocks in video coding are described. An exemplary method for video processing includes determining that a size of a residual block of a video is larger than a maximum block size allowed for a transform skip mode, in which, during a decoding operation, residual coefficients are decoded without performing an inverse transform operation; splitting, based on the size of a residual block, the residual block into multiple regions, wherein each region represents a portion of the residual block of a difference between a portion of a current video block and a prediction block corresponding to the portion of the current video block; and determining a reconstructed current video block from the residual block based on selectively performing the inverse transform operation according to an indicator that indicates the transform skip mode.

    HALF-PEL INTERPOLATION FILTER IN INTER CODING MODE
    168.
    发明申请
    HALF-PEL INTERPOLATION FILTER IN INTER CODING MODE 有权

    公开(公告)号：US20220014790A1

    公开(公告)日：2022-01-13

    申请号：US17484509

    申请日：2021-09-24

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

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

    IPC: H04N19/80 ,  H04N19/517

    Abstract: A method of video processing is provided to include: performing a conversion between a current video block of a video and a coded representation of the video, wherein the coded representation includes a first parameter that indicates a motion information precision from a multiple precision set for the current video block that does not use a default motion information precision and/or a second parameter which identifies whether an alternative half-pel interpolation filter is used for the conversion, and wherein each of the first parameter and/or the second parameter is associated with one or more bins and a context-model based coding is only used for a first bin of the one or more bins in the coded representation.

    CONTEXT CODING FOR MATRIX-BASED INTRA PREDICTION
    169.
    发明申请
    CONTEXT CODING FOR MATRIX-BASED INTRA PREDICTION 有权

    公开(公告)号：US20220014785A1

    公开(公告)日：2022-01-13

    申请号：US17479338

    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: H04N19/593 ,  H04N19/70

    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 encoding a current video block of a video using a matrix 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 selectively followed by an upsampling operation; and adding, to a coded representation of the current video block, a syntax element indicative of applicability of the MIP mode to the current video block using arithmetic coding in which a context for the syntax element is derived based on a rule.

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