中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

456 records (took 0.033 seconds)

    CONTEXT CODING FOR MATRIX-BASED INTRA PREDICTION
    262.
    发明申请
    CONTEXT CODING FOR MATRIX-BASED INTRA PREDICTION 有权

    公开(公告)号：US20230037931A1

    公开(公告)日：2023-02-09

    申请号：US17942552

    申请日：2022-09-12

    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.

    SELECTION OF SECONDARY TRANSFORM MATRICES FOR VIDEO PROCESSING
    263.
    发明申请
    SELECTION OF SECONDARY TRANSFORM MATRICES FOR VIDEO PROCESSING 有权

    公开(公告)号：US20220417529A1

    公开(公告)日：2022-12-29

    申请号：US17411170

    申请日：2021-08-25

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

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

    IPC: H04N19/159 ,  H04N19/132 ,  H04N19/61 ,  H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/12

    Abstract: A video processing method is provided to include performing a conversation between a current video block of a video and a coded representation of the video. The conversion comprises selecting, for the current video block of a video, a transform set or a transform matrix to be used in an application of a secondary transform tool to the current video block based on a characteristic of the current video block and applying the selected transform set or transform matrix to the current video block. Using the secondary transform tool, during encoding, a forward secondary transform is applied to an output of a forward primary transform applied to a residual of the current video block prior to quantization, or during decoding, an inverse secondary transform is applied to an output of dequantization of the current video block before applying an inverse primary transform.

    CONTEXT MODELING AND SELECTION OF MULTIPLE TRANSFORM MATRIX
    266.
    发明申请
    CONTEXT MODELING AND SELECTION OF MULTIPLE TRANSFORM MATRIX 有权

    公开(公告)号：US20220295061A1

    公开(公告)日：2022-09-15

    申请号：US17406315

    申请日：2021-08-19

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

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

    IPC: H04N19/12 ,  H04N19/176 ,  H04N19/159 ,  H04N19/61 ,  H04N19/70 ,  H04N19/186 ,  H04N19/625

    Abstract: Devices, systems and methods for digital video coding, which includes context modeling and multiple transform matrix selection, are described. An exemplary method for video processing includes determining, for a conversion between a current video block of a video and a bitstream representation of the video, that an indication of a transform type in a multiple transform selection (MTS) operation is excluded from the bitstream representation, and wherein the current video block is coded using an intra block copy mode, and performing the conversion, wherein the indication is in a sequence parameter set, a picture parameter set, a tile group header, a slice header, a picture header, a tile header, a coding tree unit row, or a video data unit, and wherein the MTS operation includes using a transform from a plurality of predefined transform candidates for transforming a prediction error of the current video block during the conversion.

Patent Agency Ranking