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    ENCODER, ENCODING METHOD, DECODER, AND DECODING METHOD
    422.
    发明申请
    ENCODER, ENCODING METHOD, DECODER, AND DECODING METHOD 有权

    公开(公告)号：US20240406414A1

    公开(公告)日：2024-12-05

    申请号：US18807354

    申请日：2024-08-16

    Applicant: Panasonic Intellectual Property Corporation of America

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

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

    Abstract: An encoder which encodes a current block of a picture includes a processor and memory. Using the memory, the processor: determines whether intra prediction is to be used for the current block; and when it is determined that intra prediction is to be used for the current block, generates first transform coefficients by performing first transform of residual signals of the current block using a first transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode and the first transform basis is different from a determined transform basis; 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 for the current block is not the determined mode or when the first transform basis matches the determined transform basis.

    Encoder, decoder, encoding method, and decoding method
    423.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12160602B2

    公开(公告)日：2024-12-03

    申请号：US18200807

    申请日：2023-05-23

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Kiyofumi Abe ,  Takahiro Nishi ,  Tadamasa Toma

    IPC: H04N11/02 ,  H04N19/176 ,  H04N19/186 ,  H04N19/52

    Abstract: An encoder includes circuitry and memory connected to the circuitry. In operation, the circuitry: stores MV information and correction processing information into a FIFO buffer for an HMVP mode in association, the MV information being derived for a processed block and correction processing information being related to correction processing of a prediction image of the processed block; registers, in a prediction candidate list for a merge mode, one or more prediction candidates each being a combination of MV information and correction processing information, the prediction candidates including a prediction candidate which is a combination of the motion vector information and the correction processing information stored in the FIFO buffer; and selects a prediction candidate from the prediction candidate list when a current block is to be processed in the merge mode, and performs correction processing of a prediction image of the current block, based on the correction processing information.

    Encoder, decoder, encoding method, and decoding method
    428.
    发明授权
    Encoder, decoder, encoding method, and decoding method 有权

    公开(公告)号：US12113978B2

    公开(公告)日：2024-10-08

    申请号：US18214653

    申请日：2023-06-27

    Applicant: Panasonic Intellectual Property Corporation of America

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

    IPC: H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/625

    CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/625

    Abstract: When a transform-basis adaptive selection mode is enabled, an encoder that transforms residuals of a current block to encode an image: adaptively selects a first horizontal transform basis from among one or more transform basis candidates when a horizontal size of the current block is greater than a first horizontal threshold size; otherwise selects a fixed horizontal transform basis as a first horizontal transform basis; adaptively selects a first vertical transform basis from among the one or more transform basis candidates when a vertical size of the current block is greater than a first vertical threshold size; otherwise selects a fixed vertical transform basis as a first vertical transform basis; and generates first transform coefficients by performing a first horizontal transform and a first vertical transform on the residuals of the current block, using the first horizontal transform basis selected and the first vertical transform basis selected, respectively.

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