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    METHOD AND APPARATUS OF ADAPTIVE SAMPLING FOR MESH COMPRESSION BY DECODERS
    3.
    发明申请
    METHOD AND APPARATUS OF ADAPTIVE SAMPLING FOR MESH COMPRESSION BY DECODERS 审中-公开

    公开(公告)号：WO2023059975A1

    公开(公告)日：2023-04-13

    申请号：PCT/US2022/076549

    申请日：2022-09-16

    Applicant: TENCENT AMERICA LLC

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

    IPC: G06T9/00 ,  H04N19/13 ,  G06T11/00 ,  G06T9/001 ,  H04N19/132 ,  H04N19/14 ,  H04N19/17 ,  H04N19/597 ,  H04N19/70

    Abstract: A processing circuitry decodes a plurality of maps in 2D from a bitstream carrying a mesh frame. The mesh frame represents a surface of an object with polygons. The plurality of maps includes a decoded geometry map and a decoded attribute map with an adaptive 2D atlas sampling applied. The processing circuitry determines at least a first sampling rate and a second sampling rate according to syntaxes signaled in the bitstream. The first sampling rate is applied to a first region of the mesh frame and the second sampling rate is applied to a second region of the mesh frame during the adaptive 2D atlas sampling. The processing circuitry reconstructs, based on the plurality of maps, at least a first vertex of the mesh frame according to the first sampling rate, and a second vertex of the mesh frame according to the second sampling rate.

    ADAPTIVE STREAMING OF GEOMETRY-BASED POINT CLOUDS
    4.
    发明申请
    ADAPTIVE STREAMING OF GEOMETRY-BASED POINT CLOUDS 审中-公开

    公开(公告)号：WO2023059730A1

    公开(公告)日：2023-04-13

    申请号：PCT/US2022/045796

    申请日：2022-10-05

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： GUDUMASU, Srinivas ,  HAMZA, Ahmed

    IPC: H04N21/81 ,  G06T9/00 ,  H04N21/854 ,  H04N19/597 ,  G06T9/40 ,  H04N19/103 ,  H04N21/262 ,  H04N21/845 ,  G06T9/001 ,  H04N21/26258 ,  H04N21/816 ,  H04N21/8456 ,  H04N21/85406

    Abstract: Media content may be adaptively (for example, selectively or partially) streamed based on temporal levels. The temporal levels may be indicated in a media content manifest (for example, a media presentation description (MPD)). For example, media samples for geometry-based point cloud compression (G-PCC) media content may be divided into temporal levels associated with temporal level identifiers. An MPD may indicate one or more adaptation sets associated with G-PCC media content. An adaptation set may be selected from multiple adaptation sets, A representation set may be determined from the selected adaptation set. An indication of a G-PCC descriptor associated with a representation of the representation set may be obtained from the MPD. Temporal levels present in the representation may be identified using the G-PCC descriptor, which may include a set of temporal level identifiers, The representation may be selected based on the G-PCC descriptor.

    PLANAR AND DIRECT MODE SIGNALING IN G-PCC
    5.
    发明申请
    PLANAR AND DIRECT MODE SIGNALING IN G-PCC 审中-公开

    公开(公告)号：WO2023059446A1

    公开(公告)日：2023-04-13

    申请号：PCT/US2022/044419

    申请日：2022-09-22

    Applicant: QUALCOMM INCORPORATED

    Inventor： PHAM VAN, Luong ,  VAN DER AUWERA, Geert ,  RAMASUBRAMONIAN, Adarsh Krishnan ,  KARCZEWICZ, Marta

    IPC: G06T9/00 ,  G06T9/40 ,  H04N19/597 ,  H04N19/70 ,  G06T9/001

    Abstract: A method of encoding point cloud data includes signaling at least one of: a first syntax element indicating that planar mode is disabled for a current node when angular mode is enabled; or a second syntax element indicating that angular mode is enabled for the current node; bypassing signaling of values for a planar mode for the current node in a condition where the first syntax element indicates that the planar mode is disabled for the current node when the angular mode is enabled, or in a condition where the second syntax element indicates that the angular mode is enabled for the current node; and encoding the current node in a mode other than the planar mode.

    METHOD, APPARATUS, AND MEDIUM FOR VIDEO PROCESSING
    6.
    发明申请
    METHOD, APPARATUS, AND MEDIUM FOR VIDEO PROCESSING 审中-公开

    公开(公告)号：WO2023049910A1

    公开(公告)日：2023-03-30

    申请号：PCT/US2022/077042

    申请日：2022-09-26

    Applicant: BYTEDANCE INC.

    Inventor： WANG, Ye-Kui

    IPC: H04N21/234 ,  H04N21/431 ,  H04N5/45 ,  G06T1/00 ,  H04N21/4402 ,  H04N19/70 ,  H04N19/176 ,  H04N19/597

    Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing comprises: performing a conversion between a media file of a first video and a bitstream of the first video, wherein the media file comprises an indication indicating that a first track carrying the bitstream of the first video and a second track carrying a bitstream of a second video are a track pair for providing a picture-in-picture service. The proposed method advantageously makes it possible to support picture-in-picture services in a media file based on ISO base media file format (ISOBMFF).

    POINT CLOUD DATA FRAMES COMPRESSION
    7.
    发明申请
    POINT CLOUD DATA FRAMES COMPRESSION 审中-公开

    公开(公告)号：WO2023047119A1

    公开(公告)日：2023-03-30

    申请号：PCT/GB2022/052406

    申请日：2022-09-22

    Applicant: V-NOVA INTERNATIONAL LTD

    Inventor： POULARAKIS, Stergios ,  EYLES, Christian

    IPC: G06T9/00 ,  H04N19/54 ,  H04N19/597

    Abstract: A method for encoding a frame of a sequence of frames of point cloud data for rendering a dynamic 3D scene, wherein each frame comprises a plurality of points, and each point comprises a 3D position and one or more attributes, the method comprising: obtaining a current point to be encoded in a current frame; identifying a preceding point encoded in a preceding frame which corresponds to the current point to be encoded in the current frame; encoding at least one attribute of the current point by reference to the preceding point using inter-frame predictive encoding to generate encoded data for the current point; and generating the current frame comprising the encoded data for the current point.

    PRESENTATION OF MULTI-VIEW VIDEO DATA
    8.
    发明申请
    PRESENTATION OF MULTI-VIEW VIDEO DATA 审中-公开

    公开(公告)号：WO2023046520A1

    公开(公告)日：2023-03-30

    申请号：PCT/EP2022/075329

    申请日：2022-09-13

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： VAREKAMP, Christiaan ,  WILLEMS, Andy

    IPC: H04N21/218 ,  H04N21/81 ,  H04N13/00 ,  H04N19/597 ,  H04N19/587

    Abstract: A method for presenting multi-view video data of a scene. The method comprises obtaining one or more sequences of source view images of the scene at a source view frame rate and obtaining one or more sequences of source view depth components of the scene at a source view depth frame rate. The source view depth frame rate is lower than the source view image frame rate. A selection between a source view playback mode and an interpolated playback mode is obtained, where, if the interpolated playback mode is selected, an interpolated image of the scene is generated based on one or more source view images from one or more of the sequence of source view images and on one or more corresponding source view depth components from at least one sequence of source view depth components. The interpolated image is output to a display. If the source view playback mode is selected, a sequence of source view images is output to the display.

    METHOD AND APPARATUS OF ENCODING/DECODING POINT CLOUD GEOMETRY DATA SENSED BY AT LEAST ONE SENSOR
    9.
    发明申请
    METHOD AND APPARATUS OF ENCODING/DECODING POINT CLOUD GEOMETRY DATA SENSED BY AT LEAST ONE SENSOR 审中-公开

    公开(公告)号：WO2023029671A1

    公开(公告)日：2023-03-09

    申请号：PCT/CN2022/099613

    申请日：2022-06-17

    Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

    Inventor： LASSERRE, Sebastien ,  TAQUET, Jonathan

    IPC: H04N19/597 ,  G06T9/00

    Abstract: There is provided methods and apparatus of encoding/decoding a point cloud sensed by any type of sensor following a sensing path. The method obtains coarse representations of sensed points and encodes the sensing path and the coarse representations. The sensing path and coarse representations of points are decoded, and points of the point cloud are reconstructed from the decoded sensing path and the decoded coarse representations. The coarse representations of sensed points of the point cloud are coarse points defined in a two-dimensional angular coordinate space, and a coarse point is obtained by shifting a sensing point in the two-dimensional angular coordinate space with shifting values that depend on the sensor index associated with the sensor that sensed the point P of the point cloud.

    点云编码方法、解码方法、编码设备及解码设备
    10.
    发明申请
    点云编码方法、解码方法、编码设备及解码设备 审中-公开

    公开(公告)号：WO2023025167A1

    公开(公告)日：2023-03-02

    申请号：PCT/CN2022/114346

    申请日：2022-08-23

    Applicant: 鹏城实验室

    Inventor： 赵文博 ,  王静 ,  李革 ,  高文

    IPC: H04N19/42 ,  H04N19/597 ,  H04N21/00 ,  G06T9/00

    Abstract: 本发明公开了点云编码方法、点云解码方法、点云编码设备及点云解码设备，所述点云编码方法包括：计算第一顶点到所述第一顶点的父节点的距离作为第一距离；在未编码的顶点中确定距离所述第一顶点最近的点作为第二顶点，计算所述第二顶点到所述第一顶点N个坐标分量上的残差值；对所述第二顶点到所述第一顶点N个坐标分量上的残差值的绝对值进行编码；根据所述第二顶点的残差值与所述第一距离，对所述第二顶点的残差值的符号进行编码。本发明利用点云中顶点之间的几何位置关系对残差值的绝对值和残差值中可行的符号位进行编码，提高了残差值的编码效率，同时通过优化残差值编码的效率，提升了点云预测树编码的性能。

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