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17 条记录 (耗时 0.012 秒)

    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
    1.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP4002844A1

    公开(公告)日：2022-05-25

    申请号：EP20865177.8

    申请日：2020-08-21

    申请人： KDDI Corporation

    发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

    IPC分类号： H04N19/513 ,  H04N19/577

    摘要： An image decoding device (200) includes: a prediction signal generation unit (241D) configured to determine whether or not an application condition of BDOF processing is satisfied for each block, generate a prediction signal by executing the BDOF processing in a case where it is determined that the application condition is satisfied, and set the application condition based on a weight coefficient in a case where calculation is performed using pixel values of two reference frames or values calculated from the pixel values in the BDOF processing such that the application condition includes a condition on time distances between the two reference frames and a target frame.

    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
    2.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP4149112A1

    公开(公告)日：2023-03-15

    申请号：EP21822640.5

    申请日：2021-06-03

    申请人： KDDI Corporation

    发明人： KIDANI, Yoshitaka ,  UNNO, Kyohei ,  KAWAMURA, Kei

    IPC分类号： H04N19/52 ,  H04N19/70

    摘要： An image decoding device (200) according to the present invention including: a decoding unit (210) configured to decode first syntax that controls transmission precision of a merge with motion vector difference in a sequence of a decoding target, wherein a value of the first syntax being "1" specifies that the first syntax may use integer precision as the transmission precision of a merge-mode motion vector difference in the sequence of the decoding target, and the value of the first syntax being "0" specifies that the first syntax uses fractional precision as the transmission precision of the merge-mode motion vector difference in the sequence of the decoding target.

    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
    6.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP4250728A1

    公开(公告)日：2023-09-27

    申请号：EP21909852.2

    申请日：2021-09-28

    申请人： KDDI Corporation

    发明人： KAWAMURA, Kei ,  UNNO, Kyohei

    IPC分类号： H04N19/13 ,  H04N19/136 ,  H04N19/18

    摘要： An image decoding device 200 includes: a local addition unit 104a that adds level values of decoded residual coefficients existing around a residual coefficient to be decoded and derives a sum total value of level; a transform unit 104b that transforms the sum total value of level into an amount of shift and an index; a table reference unit 104c that refers to a predefined table and outputs a pre-correction Rice parameter corresponding to the index; and a correction unit 104d that derives a post-correction Rice parameter on the basis of the pre-correction Rice parameter and the amount of shift.

    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
    7.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP3989544A1

    公开(公告)日：2022-04-27

    申请号：EP20831671.1

    申请日：2020-06-11

    申请人： KDDI Corporation

    发明人： KAWAMURA, Kei ,  UNNO, Kyohei ,  NAITO, Sei

    IPC分类号： H04N19/103 ,  H04N19/136 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

    摘要： An image decoding device (200) includes: a block structure decoding unit (201A) configured to decode the coded data to acquire luminance block division information and chrominance block division information; a determination unit (201B) configured to determine whether or not a cross-component linear model method is applicable based on the luminance block division information and the chrominance block division information; and a chrominance intra-prediction method decoding unit (201C) configured to decode a chrominance intra-prediction method according to a result of the determination.

    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
    8.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP3849195A1

    公开(公告)日：2021-07-14

    申请号：EP20827571.9

    申请日：2020-06-11

    申请人： KDDI Corporation

    发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

    IPC分类号： H04N19/82

    摘要： An image decoding device 200, includes: a filter unit 250B configured to use, as an input, a decoded signal prior to the filtering process and output a filtered decoded signal, wherein the filter unit 250B is configured to perform 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 DECODING METHOD, AND PROGRAM
    9.
    发明公开
    IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM 审中-实审

    公开(公告)号：EP4340357A2

    公开(公告)日：2024-03-20

    申请号：EP24155265.2

    申请日：2021-02-19

    申请人： KDDI Corporation

    发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

    IPC分类号： H04N19/117

    摘要： In an image decoding device 200 according to the present invention, a decoding unit 210 is configured to decode a flag indicating whether chroma-related syntax is included in a picture parameter set, and in a case where the flag indicates that chroma-related syntax is included in the picture parameter set, the decoding unit 210 is configured to decode syntax for controlling deblocking filter processing of a Cb signal and a Cr signal.

    POINT GROUP DECODING DEVICE, POINT GROUP DECODING METHOD, AND PROGRAM
    10.
    发明公开
    POINT GROUP DECODING DEVICE, POINT GROUP DECODING METHOD, AND PROGRAM 审中-公开

    公开(公告)号：EP4113456A1

    公开(公告)日：2023-01-04

    申请号：EP21779348.8

    申请日：2021-02-19

    申请人： KDDI Corporation

    发明人： UNNO, Kyohei ,  KAWAMURA, Kei ,  NAITO, Sei

    IPC分类号： G06T19/20 ,  G06T9/40

    摘要： A point-cloud decoding device 200 according to the present invention includes: a geometry information decoding unit 2010 configured to decode a flag that controls whether to apply "Implicit QtBt" or not; and an attribute-information decoding unit 2060 configured to decode a flag that controls whether to apply "scalable lifting" or not; wherein, a restriction is set not to apply the "scalable lifting" when the "Implicit QtBt" is applied.