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    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD
    1.
    发明公开
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 审中-公开

    公开(公告)号：US20240129516A1

    公开(公告)日：2024-04-18

    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: H04N19/513 ,  H04N19/105 ,  H04N19/176

    CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/176

    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
    2.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 有权

    公开(公告)号：US20210377556A1

    公开(公告)日：2021-12-02

    申请号：US17403456

    申请日：2021-08-16

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Takashi HASHIMOTO ,  Kiyofumi ABE ,  Tadamasa TOMA ,  Takahiro NISHI ,  Ryuichi KANOH

    IPC: H04N19/51 ,  H04N19/433

    Abstract: An encoding method is provided for encoding a picture to generate a coded stream. The encoding method incldues: generating a first prediction image of a current block included in a current picture by referring to a first region included in a reference picture different from the current picture; operating a bi-directional optical flow process to generate a second prediction image based on the first prediction image by referring to a second region included in the first region, and not operating the bi-directional optical flow process by referring to a third region not included in the first region; and encoding the current block based on the second prediction image.

    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD
    3.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 审中-公开

    公开(公告)号：US20200260100A1

    公开(公告)日：2020-08-13

    申请号：US16860367

    申请日：2020-04-28

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Takashi HASHIMOTO ,  Kiyofumi ABE ,  Tadamasa TOMA ,  Takahiro NISHI ,  Ryuichi KANOH

    IPC: H04N19/51 ,  H04N19/433

    Abstract: An encoder that encodes a picture to generate a coded stream includes: circuitry and a memory coupled to the circuitry. The circuitry performs, using the memory: generating a prediction image of a current block included in a current picture by referring to a first region included in a reference picture different from the current picture; operating a bi-directional optical flow process to correct the prediction image by referring to a second region included in the first region, and not operating the bi-directional optical flow process in response to the second region not being included in the first region; and encoding the current block based on the prediction image.

    ENCODER, DECODER, ENCODING METHOD, DECODING METHOD, AND RECORDING MEDIUM
    6.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, DECODING METHOD, AND RECORDING MEDIUM 有权

    公开(公告)号：US20220303572A1

    公开(公告)日：2022-09-22

    申请号：US17835743

    申请日：2022-06-08

    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
    8.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 审中-公开

    公开(公告)号：US20200099952A1

    公开(公告)日：2020-03-26

    申请号：US16696249

    申请日：2019-11-26

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Ryuichi KANOH ,  Tadamasa TOMA ,  Takahiro NISHI ,  Kiyofumi ABE ,  Takashi HASHIMOTO

    IPC: H04N19/52 ,  H04N19/159 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176

    Abstract: Provided is an encoder that achieves further improvement. The encoder includes processing circuitry and memory. Using the memory, the processing circuitry: obtains two prediction images from two reference pictures; derives a luminance gradient value of each pixel position in each of the two prediction images; derives a luminance local motion estimation value of each pixel position in a current block; generates a luminance final prediction image using a luminance value and the luminance gradient value in each of the two prediction images, and the luminance local motion estimation value of the current block; and generates a chrominance final prediction image using at least one of the luminance gradient value of each of the two prediction images or the luminance local motion estimation value of the current block, and chrominance of each of the two prediction images.

    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD
    9.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 审中-公开

    公开(公告)号：US20200045329A1

    公开(公告)日：2020-02-06

    申请号：US16597356

    申请日：2019-10-09

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Takashi HASHIMOTO ,  Takahiro NISHI ,  Tadamasa TOMA ,  Kiyofumi ABE ,  Ryuichi KANOH

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

    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.

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