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

    公开(公告)号：EP4459555A1

    公开(公告)日：2024-11-06

    申请号：EP21969936.0

    申请日：2021-12-27

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： SUGIMOTO Shiori ,  BANDO Yukihiro ,  KITAHARA Masaki

    IPC分类号： G06T9/40

    摘要： A coding device includes: a position information coder configured to convert position information indicating a position of a point included in point cloud data into a tree structure, divide the tree structure in a depth direction to generate layer groups, divide at least one of the layer groups on a basis of the position information to generate subgroups, and code the subgroup to generate a position data unit corresponding to a part of the position information; a levels of detail structure generator configured to generate, for each attribute data unit corresponding to a part of attribute information indicating an attribute of a point included in the point cloud data, a detail level up to a layer overlapping with a parent attribute data unit in the depth direction, in order from a leaf side to a root side of the tree structure; and a prediction reference point determiner configured to determine, for each of the attribute data units, in order from the root side to the leaf side of the tree structure, for each point not subsampled when the detail level is generated, a prediction reference point from a layer same as a layer including the point not subsampled when the detail level is generated or a layer closer to the root side than the layer including the point not subsampled when the detail level is generated.

    BUFFERING A GRAPHICAL OVERLAY TO BE APPLIED TO AN IMAGE
    2.
    发明公开
    BUFFERING A GRAPHICAL OVERLAY TO BE APPLIED TO AN IMAGE 审中-公开

    公开(公告)号：EP4451218A1

    公开(公告)日：2024-10-23

    申请号：EP23168392.1

    申请日：2023-04-18

    申请人： Axis AB

    发明人： Förberg, Johan ,  Nyström, Johan ,  Hassbring, Ludvig

    IPC分类号： G06T9/00 ,  H04N19/23 ,  H04N19/11 ,  H04N19/167 ,  H04N19/182

    摘要： A device and a method for buffering a graphical overlay to be applied to an image is disclosed. A graphical overlay description specifying content, size, and position in the image of a graphical element of the graphical overlay is obtained, and the graphical overlay is divided into a plurality of sequential line fragments. For each line fragment it is determined, using the graphical overlay description, whether the line fragment overlaps a part of the graphical element. On condition that the line fragment overlaps a part of the graphical element, information representing the part of the graphical element is buffered in a buffer memory for the line fragment. On condition that the line fragment does not overlap any part of the graphical element, a run-length coding representing identical pixels is buffered in the buffer memory for the line fragment.