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    Encoder, decoder, encoding method, and decoding method
    82.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US11006110B2

    公开(公告)日：2021-05-11

    申请号：US16809216

    申请日：2020-03-04

    Applicant: Panasonic Intellectual Property Corporation of America

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

    IPC: H04N19/117 ,  H04N19/146 ,  H04N19/176

    Abstract: An encoder determines a filter to be used for deblocking filtering from among a plurality of filters including a first filter and a second filter. The first filter uses M pixels located at an upper side of the block boundary and M pixels located at a lower side of the block boundary, and the second filter uses first pixels located at the upper side of the block boundary and second pixels located at the lower side of the block boundary, where M is an integer of at least 2. The number of the first pixels is any one of a plurality of first candidate values, and the number of the second pixels is any one of a plurality of second candidate values. The plurality of first pixel candidate values and the plurality of second pixel candidate values are each a value greater than or equal to M.

    Encoder, decoder, encoding method, and decoding method
    84.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US10917641B2

    公开(公告)日：2021-02-09

    申请号：US16450066

    申请日：2019-06-24

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Ryuichi Kanoh ,  Takahiro Nishi ,  Tadamasa Toma

    IPC: H04N19/117 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61 ,  H04N19/82

    Abstract: An encoder includes processing circuitry; and a memory coupled to the processing circuitry. Using the memory, the processing circuitry is configured to: change values of pixels in a first block and a second block to filter the boundary between the first block and the second block such that change amounts of the respective values are smaller than respective thresholds, the pixels being arranged along a line across the boundary; and encode a third block. The pixels in the first block include a first pixel located at a first position, and the pixels in the second block include a second pixel located at a second position corresponding to the first position with respect to the boundary. The thresholds include a first threshold and a second threshold corresponding to the first pixel and the second pixel, respectively. The first threshold is different from the second threshold.

    Encoder, decoder, encoding method, and decoding method
    87.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US10728543B2

    公开(公告)日：2020-07-28

    申请号：US16702254

    申请日：2019-12-03

    Applicant: Panasonic Intellectual Property Corporation of America

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

    IPC: H04N19/119 ,  H04N19/105 ,  H04N19/14 ,  H04N19/573 ,  H04N19/176 ,  H04N19/52 ,  H04N19/139

    Abstract: An encoder includes memory and circuitry. Using the memory, the circuitry: in a first operating mode, derives a first motion vector in a unit of a prediction block obtained by splitting an image included in a video, and performs, in the unit of the prediction block, a first motion compensation process that generates a prediction image by referring to a spatial gradient of luminance in an image generated by performing motion compensation using the first motion vector derived; and in a second operating mode, derives a second motion vector in a unit of a sub-block obtained by splitting the prediction block, and performs, in the unit of the sub-block, a second motion compensation process that generates a prediction image without referring to a spatial gradient of luminance in an image generated by performing motion compensation using the second motion vector derived.

    Recording medium, playback method, and playback device
    90.
    发明授权
    Recording medium, playback method, and playback device 有权

    公开(公告)号：US10679663B2

    公开(公告)日：2020-06-09

    申请号：US15699091

    申请日：2017-09-08

    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

    Inventor： Hiroshi Yahata ,  Tadamasa Toma

    IPC: G11B20/10 ,  G11B27/32 ,  H04N5/85 ,  G11B27/10 ,  H04N5/93 ,  H04N9/87 ,  H04N9/804 ,  H04N9/82

    Abstract: A recording medium includes a video stream of a standard-luminance range and a video stream of high-luminance range, which are used selectively in accordance with a playback environment. The recording medium also includes a subtitle stream of the standard-luminance range and a subtitle stream of the high-luminance range, which are used selectively in accordance with the playback environment. A playlist file includes a management region where playback control information relating to a main stream is stored, and includes an extended region. The management region stores first playback control information specifying playing of the video stream of the high-luminance range and the subtitle stream of the high-luminance range in combination. The extended region stores second playback control information specifying playing of the video stream of the standard-luminance range and the subtitle stream of the standard-luminance range in combination.

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