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    Encoder, decoder, encoding method, decoding method, and recording medium
    3.
    发明授权
    Encoder, decoder, encoding method, decoding method, and recording medium 有权

    公开(公告)号：US11425413B2

    公开(公告)日：2022-08-23

    申请号：US16660071

    申请日：2019-10-22

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma ,  Ryuichi Kanoh ,  Takashi Hashimoto

    IPC: H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/59

    Abstract: An encoder that; obtains two prediction images by performing motion compensation using two motion vectors; obtains a gradient value of each of pixels included in the two prediction images; derives a local motion estimation value for each of sub-blocks based on the pixel value and the gradient value of each of the pixels, the sub-blocks being obtained by partitioning the current block; and generates a final prediction image for the current block using the pixel value and the gradient value of each of the pixels, and the local motion estimation value derived for each of the sub-blocks. Each of the pixels in the two prediction images is interpolated with sub-pixel accuracy, and a reference range for the interpolation is included in a normal reference range that is referred to for motion compensation for the current block in normal inter prediction performed without using the local motion estimation value.

    Encoder, decoder, encoding method, and decoding method
    4.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12167022B2

    公开(公告)日：2024-12-10

    申请号：US18390148

    申请日：2023-12-20

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Takashi Hashimoto ,  Takahiro Nishi ,  Tadamasa Toma ,  Kiyofumi Abe ,  Ryuichi Kanoh

    IPC: H04N19/50 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

    Abstract: A decoder that decodes a current block using a motion vector includes: a processor; and memory. Using the memory, the processor: derives a first candidate vector from one or more candidate vectors of one or more neighboring blocks that neighbor the current block; determines, in a first reference picture for the current block, a first adjacent region that includes a position indicated by the first candidate vector; calculates evaluation values of a plurality of candidate regions included in the first adjacent region; and determines a first motion vector of the current block, based on a first candidate region having a smallest evaluation value among the evaluation values. The first adjacent region is included in a first motion estimation region determined based on the position indicated by the first candidate vector.

    Encoder, decoder, encoding method, and decoding method
    10.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US11297322B2

    公开(公告)日：2022-04-05

    申请号：US17141849

    申请日：2021-01-05

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Kiyofumi Abe ,  Takahiro Nishi ,  Takashi Hashimoto ,  Tadamasa Toma

    IPC: H04N19/13 ,  H04N19/157 ,  H04N19/91 ,  H04N19/18

    Abstract: An encoder includes memory and circuitry accessible to the memory. The circuitry accessible to the memory: switches whether or not to apply arithmetic encoding to a binary data string in which image information has been binarized; binarizes frequency transform coefficient information according to different binarization formats between when arithmetic encoding is applied to the binary data string and when arithmetic encoding is not applied to the binary data string; and binarizes a part or the entirety of prediction parameter information according to a binarization format which is common between when arithmetic encoding is applied to the binary data string and when arithmetic encoding is not applied to the binary data string.

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