知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

225 条记录 (耗时 0.03 秒)

    Encoder, decoder, encoding method, and decoding method
    5.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US11956434B2

    公开(公告)日：2024-04-09

    申请号：US18062335

    申请日：2022-12-06

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： Yusuke Kato ,  Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma

    IPC分类号： H04N19/13 ,  H04N19/169 ,  H04N19/176 ,  H04N19/46

    CPC分类号： H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/1887

    摘要： An encoder includes circuitry and memory coupled to the circuitry. The circuitry, in operation, for each coefficient of a plurality of coefficients included in a block, determines a base level relating to Context-Based Adaptive Binary Arithmetic Coding (CABAC) for the coefficient, and encodes an absolute value of the coefficient. In determining the base level, when one or more flags are used in encoding the absolute value of the coefficient, the base level is determined to be a first value, and when one or more flags are not used in the encoding, the base level is determined to be a second value that is smaller than the first value. In encoding the absolute value of the coefficient, when one or more flags are not used, a rice parameter is determined based on the base level which is equal to the second value, and the coefficient is binarized using the rice parameter.

    Cascade prediction
    9.
    发明授权
    Cascade prediction 有权

    公开(公告)号：US11838531B2

    公开(公告)日：2023-12-05

    申请号：US17781165

    申请日：2020-12-03

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Harshad Kadu ,  Guan-Ming Su

    IPC分类号： H04N19/50 ,  H04N19/186 ,  H04N19/169

    CPC分类号： H04N19/50 ,  H04N19/186 ,  H04N19/1887

    摘要： A first predictor is applied to an input image to generate first-stage predicted codewords approximating prediction target codewords of a prediction target image. Second-stage prediction target values are created by performing an inverse cascade operation on the prediction target codewords and the first-stage predicted codewords. A second predictor is applied to the input image to generate second-stage predicted values approximating the second-stage prediction target values. Multiple sets of cascade prediction coefficients are generated to comprise first and second sets of cascade prediction coefficients specifying the first and second predictors. The multiple sets of cascade prediction coefficients are encoded, in a video signal, as image metadata. The video signal is further encoded with the input image.