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    Image decoding device with block motion compensator and determination mechanism
    2.
    发明授权
    Image decoding device with block motion compensator and determination mechanism 有权

    公开(公告)号：US12022113B2

    公开(公告)日：2024-06-25

    申请号：US17183788

    申请日：2021-02-24

    申请人： KDDI CORPORATION

    发明人： Yoshitaka Kidani ,  Kei Kawamura ,  Kyohei Unno ,  Sei Naito

    IPC分类号： H04N19/583 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52

    CPC分类号： H04N19/583 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52

    摘要： An image decoding device includes: a motion compensation predictor configured to generate a prediction image signal of a prediction target block based on information about a motion vector in a unit of the block and a reference frame; an overlapped block motion compensator carrying out an overlapped block motion compensation process of correcting the prediction image signal of the prediction target block by subjecting the prediction image signal of the prediction target block and a prediction image signal generated based on information about a motion vector and a reference frame of an adjacent block of the prediction target block to weighted averaging; and a determinater determining whether the overlapped block motion compensation process is applied to the prediction target block or not. The determinater determines application of the overlapped block motion compensation process to the prediction target block, when unidirectional prediction is applied to the adjacent block.

    Image decoding device, image decoding method, and program
    4.
    发明授权
    Image decoding device, image decoding method, and program 有权

    公开(公告)号：US11627311B2

    公开(公告)日：2023-04-11

    申请号：US17437991

    申请日：2020-03-04

    申请人： KDDI CORPORATION

    发明人： Kyohei Unno ,  Kei Kawamura ,  Sei Naito

    IPC分类号： H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

    摘要： An image decoding device includes: a motion vector decoding unit that decodes a motion vector from encoded data; a refinement unit that performs refinement processing to correct the decoded motion vector; and a predictive signal generation unit that generates a predictive signal on the basis of the corrected motion vector outputted from the refinement unit. The predictive signal generation unit determines whether or not to apply BDOF processing for each block, on the basis of information calculated in the course of the refinement processing.

    Image decoding device, image encoding device, image processing system, and program
    5.
    发明授权
    Image decoding device, image encoding device, image processing system, and program 有权

    公开(公告)号：US11438625B2

    公开(公告)日：2022-09-06

    申请号：US16981744

    申请日：2019-08-29

    申请人： KDDI CORPORATION

    发明人： Kyohei Unno ,  Kei Kawamura ,  Sei Naito

    IPC分类号： H04N19/57 ,  H04N19/105 ,  H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/52

    摘要： An image decoding device includes a prediction unit configured to generate a prediction signal included in a prediction block based on a motion vector. The prediction unit is configured to perform refinement processing of setting a search range based on a reference position specified by the motion vector, specifying a corrected reference position having the smallest predetermined cost from the search range, and correcting the motion vector based on the corrected reference position. When a block size of the prediction block is larger than a predetermined block size, the prediction unit is configured to divide the prediction block into sub-block groups and perform the refinement processing for each sub-block.

    Image decoding device, image decoding method, and program
    7.
    发明授权
    Image decoding device, image decoding method, and program 有权

    公开(公告)号：US11949860B2

    公开(公告)日：2024-04-02

    申请号：US17855218

    申请日：2022-06-30

    申请人： KDDI CORPORATION

    发明人： Kyohei Unno ,  Kei Kawamura ,  Sei Naito

    IPC分类号： H04N19/117 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30 ,  H04N19/82

    CPC分类号： H04N19/117 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30 ,  H04N19/82

    摘要： An image decoding device, includes a filter unit using, as an input, a decoded signal prior to the filtering process and output a filtered decoded signal. The filter unit performs clipping processing on the decoded signal prior to the filtering process such that the absolute value of a differential value between a reference pixel value and a pixel value of the decoded signal prior to the filtering process is less than or equal to a predefined threshold value, and to generate the filtered decoded signal through the linear weighted addition of the value after the clipping processing is performed and the pixel value of the decoded signal prior to the filtering process; and a large-small relationship between the threshold value for a luma signal and the threshold value for a chroma signal are defined such that the large-small relationship is unchanged when an internal bit depth is changed.

    Image decoding device, image encoding device, image processing system, and program
    9.
    发明授权
    Image decoding device, image encoding device, image processing system, and program 有权

    公开(公告)号：US11627336B2

    公开(公告)日：2023-04-11

    申请号：US17860485

    申请日：2022-07-08

    申请人： KDDI CORPORATION

    发明人： Kyohei Unno ,  Kei Kawamura ,  Sei Naito

    IPC分类号： H04N19/57 ,  H04N19/105 ,  H04N19/513 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52

    摘要： An image decoding device includes a prediction unit configured to generate a prediction signal included in a prediction block based on a motion vector. The prediction unit is configured to perform refinement processing of setting a search range based on a reference position specified by the motion vector, specifying a corrected reference position having the smallest predetermined cost from the search range, and correcting the motion vector based on the corrected reference position. When a block size of the prediction block is larger than a predetermined block size, the prediction unit is configured to divide the prediction block into sub-block groups and perform the refinement processing for each sub-block.

    Image decoding device, image decoding method, and program
    10.
    发明授权
    Image decoding device, image decoding method, and program 有权

    公开(公告)号：US11412219B2

    公开(公告)日：2022-08-09

    申请号：US17187025

    申请日：2021-02-26

    申请人： KDDI CORPORATION

    发明人： Kyohei Unno ,  Kei Kawamura ,  Sei Naito

    IPC分类号： H04N19/117 ,  H04N19/82 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30

    摘要： An image decoding device, includes a filter unit using, as an input, a decoded signal prior to the filtering process and output a filtered decoded signal. The filter unit performs clipping processing on the decoded signal prior to the filtering process such that the absolute value of a differential value between a reference pixel value and a pixel value of the decoded signal prior to the filtering process is less than or equal to a predefined threshold value, and to generate the filtered decoded signal through the linear weighted addition of the value after the clipping processing is performed and the pixel value of the decoded signal prior to the filtering process; and a large-small relationship between the threshold value for a luma signal and the threshold value for a chroma signal are defined such that the large-small relationship is unchanged when an internal bit depth is changed.