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    Encoder, decoder, encoding method, and decoding method
    412.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12231662B2

    公开(公告)日：2025-02-18

    申请号：US18078443

    申请日：2022-12-09

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Takahiro Nishi ,  Tadamasa Toma ,  Kiyofumi Abe

    IPC: H04N19/31 ,  H04N19/172 ,  H04N19/70

    Abstract: An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry: encodes pictures in an encoding order according to temporal scalability that specifies temporal layers; adds, to a bitstream, information indicating whether CPB removal timings of lower pictures in one or more first temporal layers lower than or equal to a lower temporal layer lower than a higher temporal layer among the temporal layers in a first case in which the one or more first temporal layers are to be decoded are identical to CPB removal timings of the lower pictures in a second case in which second temporal layers lower than or equal to the higher temporal layer are to be decoded; and sets, in the information, a value indicating that the CPB removal timings in the first case are identical to the CPB removal timings in the second case.

    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD
    413.
    发明申请
    ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD 有权

    公开(公告)号：US20250039378A1

    公开(公告)日：2025-01-30

    申请号：US18909183

    申请日：2024-10-08

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Kiyofumi ABE ,  Takhiro Nishi ,  Tadamasa Toma

    IPC: H04N19/12 ,  H04N19/126 ,  H04N19/159 ,  H04N19/176

    Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry: performs a transform process of (i) applying a first transform to a prediction residual signal indicating a difference between a current block to be encoded and a prediction image of the current block and (ii) further applying a second transform to a transform result of the first transform; and in the second transform, selects one transform basis (i) from a first group of candidates when a size of the current block is a first block size and (ii) from a second group of candidates when the size of the current block is a second block size different from the first block size, the first group including one or more candidates for a transform basis, the second group being different from the first group.

    Encoder, encoding method, decoder, and decoding method
    416.
    发明授权
    Encoder, encoding method, decoder, and decoding method 有权

    公开(公告)号：US12192482B2

    公开(公告)日：2025-01-07

    申请号：US18213367

    申请日：2023-06-23

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Masato Ohkawa ,  Hideo Saitou ,  Tadamasa Toma ,  Takahiro Nishi ,  Kiyofumi Abe ,  Ryuichi Kanoh

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

    Abstract: When intra prediction is to be used, an encoder determines whether an adaptive basis selection mode is to be used and whether a size of the current block matches a determined size. When the adaptive basis selection mode is to be used and the size matches the determined size, the encoder fixes the first transform basis for the current block to a first determined transform basis in the adaptive basis selection mode, and generates first transform coefficients by performing first transform of residual signals of the current block using the first determined transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode; and generates second transform coefficients by performing second transform of the first transform coefficients using a second transform basis, and quantizes the second transform coefficients, when the intra prediction mode is not the determined mode.

    Encoder, decoder, encoding method, and decoding method
    417.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12184884B2

    公开(公告)日：2024-12-31

    申请号：US18137042

    申请日：2023-04-20

    Applicant: Panasonic Intellectual Property Corporation of America

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

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/513

    Abstract: An encoder is an encoder that encodes a block in a picture using a prediction image of the block, and includes circuitry and memory. Using the memory, the circuitry: calculates a first average pixel value which is an average pixel value of first reference samples out of the first reference samples and second reference samples, The first reference samples are referable and located outside the block and adjacent to a first side of the block. The second reference samples are referable and located outside the block and adjacent to a second side of the block. When generating the prediction image, the circuitry applies the same prediction pixel value to inner samples among current samples to be processed that are included in the block. The inner samples constitute a quadrilateral region including at least two current samples in each of a horizontal direction and a vertical direction.

    Encoder, decoder, encoding method, and decoding method
    420.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12167021B2

    公开(公告)日：2024-12-10

    申请号：US18137035

    申请日：2023-04-20

    Applicant: Panasonic Intellectual Property Corporation of America

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

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/513

    Abstract: An encoder is an encoder that encodes a block in a picture using a prediction image of the block, and includes circuitry and memory. Using the memory, the circuitry: calculates a first average pixel value which is an average pixel value of first reference samples out of the first reference samples and second reference samples. The first reference samples are referable and located outside the block and adjacent to a first side of the block. The second reference samples are referable and located outside the block and adjacent to a second side of the block. When generating the prediction image, the circuitry applies the same prediction pixel value to inner samples among current samples to be processed that are included in the block. The inner samples constitute a quadrilateral region including at least two current samples in each of a horizontal direction and a vertical direction.

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