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

    公开(公告)号：EP4387234A3

    公开(公告)日：2024-07-03

    申请号：EP24173128.0

    申请日：2013-03-26

    申请人： JVCKenwood Corporation

    发明人： KUMAKURA, Toru ,  FUKUSHIMA, Shigeru

    IPC分类号： H04N19/13 ,  H04N19/18 ,  H04N19/70 ,  H04N19/176 ,  H04N19/593 ,  H04N19/91

    CPC分类号： H04N19/91 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70 ,  H04N19/13 ,  H04N19/18

    摘要： In a picture coding device that partitions difference information that is a transform coefficient of a difference signal between a coding target picture and a prediction picture into a plurality of partial regions, and codes difference coefficients in units of partial regions, a significant coefficient information coding controller 706 and an arithmetic encoder 701 code significant difference coefficient information indicating that a difference coefficient value is not zero and significant for each of the difference coefficients in the partial region of the coding target. A difference coefficient value coding controller 707 and the arithmetic encoder 701 code difference coefficient values when significant difference coefficient information is significant for each of pixels in the partial region of the coding target. The significant coefficient information coding controller 706 decides a context for coding the significant difference coefficient information in the partial region of the coding target based on information indicating significance of the difference coefficient in the coded partial region.

    POINT CLOUD CODING METHOD AND APPARATUS, POINT CLOUD DECODING METHOD AND APPARATUS, AND COMPUTER AND STORAGE MEDIUM
    8.
    发明公开
    POINT CLOUD CODING METHOD AND APPARATUS, POINT CLOUD DECODING METHOD AND APPARATUS, AND COMPUTER AND STORAGE MEDIUM 审中-实审

    公开(公告)号：EP4391538A1

    公开(公告)日：2024-06-26

    申请号：EP22930641.0

    申请日：2022-12-08

    申请人： Tencent Technology (Shenzhen) Company Limited

    发明人： ZHU, Wenjie

    IPC分类号： H04N19/42 ,  G06T9/00

    CPC分类号： H04N19/60 ,  H04N19/42 ,  H04N19/64 ,  G06T9/00 ,  H04N19/597 ,  H04N19/91 ,  H04N19/18 ,  H04N19/13

    摘要： The embodiments of the present application relate to the field of big data. Disclosed are a point cloud coding method and a point cloud decoding method. The point cloud coding method comprises: acquiring coding limit information, and on the basis of the coding limit information, acquiring a sequence of transformation coefficients to be coded of point cloud points to be coded, said point cloud points being included in a point cloud group to be coded, wherein the coding limit information comprises a limit threshold value of the number of groups, the number of point cloud groups to be coded is less than or equal to the limit threshold value of the number of groups, and said sequence is obtained by means of sorting transformation coefficients of said point cloud points (301); and coding said sequence, so as to obtain a point cloud group code stream corresponding to the point cloud group to be coded (302).

    TEMPORAL SIGNALLING FOR VIDEO CODING TECHNOLOGY
    10.
    发明公开
    TEMPORAL SIGNALLING FOR VIDEO CODING TECHNOLOGY 审中-实审

    公开(公告)号：EP4383720A2

    公开(公告)日：2024-06-12

    申请号：EP24172213.1

    申请日：2020-03-18

    申请人： V-Nova International Limited

    发明人： MEARDI, Guido ,  DAMNJANOVIC, Ivan

    IPC分类号： H04N19/70

    CPC分类号： H04N19/107 ,  H04N19/124 ,  H04N19/136 ,  H04N19/18 ,  H04N19/33 ,  H04N19/48 ,  H04N19/503 ,  H04N19/70

    摘要： An encoder configured to receive an input video comprising respective frames, each frame being divided into a plurality of tiles and each tile being divided into a plurality of blocks. The encoder is configured to generate a base encoded stream using a base encoder, determine a temporal mode for one or more further encoded enhancement streams generated using an enhancement encoder and generate the one or more further encoded enhancement streams according to the determined temporal mode. The temporal mode is either a first temporal mode that does not apply non-zero values from a temporal buffer or a second temporal mode that does apply non-zero values from the temporal buffer. Generating the one or more further encoded enhancement streams comprises applying a transform to each of a series of blocks. The temporal mode is determined for one or more of a frame, tile or block.