Method and apparatus for encoding a point cloud representing three-dimensional objects

    公开(公告)号:US11095920B2

    公开(公告)日:2021-08-17

    申请号:US16769807

    申请日:2018-11-29

    IPC分类号: H04N19/597 G06T9/00

    摘要: A colored 3D scene is encoded as one or two patch atlas images. Points of the 3D scene belonging a part of the space defined according to a truncated sphere center on a point of view and visible from this point of view are iteratively projected onto projection maps. At each iteration the projected part is removed from the 3D scene and the truncated sphere defining the next part of the scene to be projected is rotated. Once the entirety of the 3D scene is projected on a set of projection maps, pictures are determined within these maps. A picture, also called patch, is a cluster of depth consistent connected pixels. Patches are packed in a depth and a color atlas associated with data comprising an information relative to the rotation of the truncated sphere, so, a decoder can retrieve the projection mapping and proceed to the inverse projection.

    Processing volumetric data
    3.
    发明授权

    公开(公告)号:US12101506B2

    公开(公告)日:2024-09-24

    申请号:US17622278

    申请日:2020-06-23

    IPC分类号: H04N19/597 H04N19/70

    CPC分类号: H04N19/597 H04N19/70

    摘要: At least one embodiment relates to a method and apparatus for encoding a volumetric video representing a scene, said encoding being based on patches representing the color and depth of a 2D projection of subparts of the scene, wherein a first patch is packed in a second patch for a given time interval lower than or equal to a time period along which the second patch is defined when said first patch can be packed in said second patch over said time interval. Decoding method and apparatus are also provided.

    METHOD AND APPARATUS FOR LOOP-PLAYING VIDEO CONTENT

    公开(公告)号:US20210400334A1

    公开(公告)日:2021-12-23

    申请号:US17297039

    申请日:2019-11-22

    IPC分类号: H04N21/433 H04N21/44

    摘要: Methods and devices are provided to play back a video content item comprising loop sequences. The player manages two or three playing modes and switch between first-in first-out video buffer and circular video buffer with a size adapted to the loop sequences for which the player is in loop mode. A start point and an end point are obtained for each loop sequence of the video. In an embodiment, a code is associated with frames of the video to indicate to which loop(s) a frame belongs to.