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    DYNAMIC MESH VERTEX DISPLACEMENTS CODING
    81.
    发明公开
    DYNAMIC MESH VERTEX DISPLACEMENTS CODING 审中-公开

    公开(公告)号：US20240007670A1

    公开(公告)日：2024-01-04

    申请号：US18315020

    申请日：2023-05-10

    申请人： Tencent America LLC

    发明人： Chao HUANG ,  Xiaozhong Xu ,  Jun Tian ,  Xiang Zhang ,  Shan Liu

    IPC分类号： H04N19/597 ,  H04N19/172 ,  H04N19/46 ,  H04N19/70

    CPC分类号： H04N19/597 ,  H04N19/172 ,  H04N19/46 ,  H04N19/70

    摘要： A method and apparatus that derives a curve of a mesh sequence from a frame of a video bitstream, the curve comprising a plurality of vertices; subdivides the curve by adding a plurality of subdivided vertices; calculates one or more displacement vectors between each of the plurality of vertices on the curve and each of the plurality of subdivided vertices on the subdivided curve; transforms the one or more displacement vectors to output one or more original coefficients; tracks the current frame with a previous frame to obtain a one-to-one correspondence between the plurality of vertices of the current frame and a plurality of vertices of the previous frame; predicts one or more coefficients of each of the plurality of vertices in current frame based on the one-to-one correspondence; performs entropy coding on one or more prediction residues; and encodes the one or more prediction residues.

    IMAGE PROCESSING DEVICE AND METHOD
    82.
    发明公开
    IMAGE PROCESSING DEVICE AND METHOD 审中-公开

    公开(公告)号：US20240007668A1

    公开(公告)日：2024-01-04

    申请号：US18039626

    申请日：2021-12-10

    申请人： Sony Group Corporation

    发明人： Tsuyoshi KATO ,  Koji YANO

    IPC分类号： H04N19/597 ,  G06T17/00 ,  H04N13/351

    CPC分类号： H04N19/597 ,  G06T17/00 ,  H04N13/351

    摘要： There is provided an image processing device and an image processing method capable of suppressing reduction in access speed to decoding results stored in a storage area. Coded data is decoded to generate a video frame including geometry data and a video frame including attribute data, of a point cloud expressing a three-dimensional object as a set of points. Using table information associating each of a plurality of valid points of the point cloud with each of a plurality of successive small areas in a storage area, the geometry data and the attribute data of the plurality of valid points are stored in the small area of the storage area, associated with the valid point in the table information. The present disclosure can be applied to, for example, an image processing device, an electronic device, an image processing method, a program, or the like.

    TEMPORAL PREDICTION BASED VERTEX POSITION COMPRESSION
    87.
    发明公开
    TEMPORAL PREDICTION BASED VERTEX POSITION COMPRESSION 审中-公开

    公开(公告)号：US20230388543A1

    公开(公告)日：2023-11-30

    申请号：US18127487

    申请日：2023-03-28

    申请人： Tencent America LLC

    发明人： Jun TIAN ,  Chao HUANG ,  Xiang ZHANG ,  Xiaozhong XU ,  Shan LIU

    IPC分类号： H04N19/597 ,  H04N19/105 ,  H04N19/154 ,  H04N19/172 ,  H04N19/46

    CPC分类号： H04N19/597 ,  H04N19/105 ,  H04N19/154 ,  H04N19/172 ,  H04N19/46

    摘要： A plurality of neighboring vertices of a current vertex in a current frame of a mesh is determined. The current frame corresponds to the mesh at a first time instance. Each of the plurality of neighboring vertices is connected to the current vertex through a respective edge in the mesh. A plurality of neighboring estimation errors of the plurality of neighboring vertices is determined. Each of the plurality of neighboring estimation errors indicates a difference between a reference vertex of a corresponding one of the plurality of neighboring vertices in a reference frame and the corresponding one of the plurality of neighboring vertices in the current frame. The reference frame corresponds to the mesh at a second time instance. A prediction residue of the current vertex is determined based on the plurality of neighboring estimation errors. Prediction information of the current vertex is generated based on the determined prediction residue.