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    POINT CLOUD ATTRIBUTE ENCODING METHOD, POINT CLOUD DECODING METHOD, AND TERMINAL
    1.
    发明公开
    POINT CLOUD ATTRIBUTE ENCODING METHOD, POINT CLOUD DECODING METHOD, AND TERMINAL 审中-公开

    公开(公告)号：EP4443870A1

    公开(公告)日：2024-10-09

    申请号：EP22900605.1

    申请日：2022-12-01

    申请人： Vivo Mobile Communication Co., Ltd.

    发明人： ZHANG, Wei ,  YANG, Fuzheng ,  LU, Jingyun ,  LV, Zhuoyi

    IPC分类号： H04N13/161

    CPC分类号： H04N19/119 ,  H04N19/96 ,  H04N13/161 ,  H04N19/13 ,  H04N19/136

    摘要： This application discloses a point cloud attribute coding method, a point cloud decoding method, and a terminal, and belongs to the field of point cloud processing technologies. The point cloud attribute coding method according to an embodiment of this application includes: An encoder side obtains a to-be-coded point cloud, where the to-be-coded point cloud includes at least one type of attribute information, and each coding point in the to-be-coded point cloud includes an attribute value corresponding to the attribute information. The encoder side determines a target ordering manner of the to-be-coded point cloud based on an initial order corresponding to the to-be-coded point cloud or based on the initial order and density corresponding to the to-be-coded point cloud, where the initial order is determined based on an attribute value of a target coding point in the to-be-coded point cloud, and the density is determined based on geometric information of the to-be-coded point cloud and a quantity of coding points in the to-be-coded point cloud. The encoder side codes the to-be-coded point cloud according to the target ordering manner.

    TRANSFORM-BASED IMAGE CODING
    7.
    发明公开
    TRANSFORM-BASED IMAGE CODING 审中-实审

    公开(公告)号：EP4415358A2

    公开(公告)日：2024-08-14

    申请号：EP24185104.7

    申请日：2020-03-26

    申请人： LG Electronics Inc.

    发明人： KOO, Moonmo ,  LIM, Jaehyun ,  KIM, Seunghwan ,  NAM, Junghak

    IPC分类号： H04N19/13

    CPC分类号： H04N19/70 ,  H04N19/61 ,  H04N19/11 ,  H04N19/12 ,  H04N19/13 ,  H04N19/96 ,  H04N19/176 ,  H04N19/157 ,  H04N19/1887

    摘要： An image decoding method according to the present document comprises a step for performing inverse first-order transform and inverse non-separable transform on a residual sample. The inverse non-separable transform is performed on the basis of a transform index indicating a predetermined transform kernel matrix, the inverse first-order transform is performed on the basis of a multiple transform selection (MTS) index indicating MTS for a horizontal transform kernel and a vertical transform kernel, and a syntax element bin string for the transform index is derived on the basis of first context information when a tree type for a split structure of a target block is not a single tree type and is derived on the basis of second context information when the tree type is the single tree type.