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    Point cloud encoding method and encoder
    1.
    发明授权
    Point cloud encoding method and encoder 有权

    公开(公告)号：US11875538B2

    公开(公告)日：2024-01-16

    申请号：US17205100

    申请日：2021-03-18

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Dejun Zhang ,  Tian Wang ,  Vladyslav Zakharchenko

    IPC: G06T9/00 ,  H04N19/172

    CPC classification number: G06T9/00 ,  H04N19/172

    Abstract: A point cloud encoding method is provided to improve coding efficiency. The method includes: obtaining global matched patches in N frames of point clouds in a point cloud group; determining M union patch occupancy maps corresponding to M sets, where a union patch occupancy map corresponding to an mth set is a union set of occupancy maps of all global matched patches in the mth set; packing the M union patch occupancy maps to obtain a global occupancy map; packing each of the N frames of point clouds to obtain occupancy maps of the N frames of point clouds; and encoding the N frames of point clouds based on the occupancy maps of the N frames of point clouds.

    Media Packetization For Network Qualitative Communication
    2.
    发明公开
    Media Packetization For Network Qualitative Communication 审中-公开

    公开(公告)号：US20230319279A1

    公开(公告)日：2023-10-05

    申请号：US18330945

    申请日：2023-06-07

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Lijun Dong ,  Vladyslav Zakharchenko

    IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18

    CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/18

    Abstract: A media data coding mechanism is disclosed. The mechanism includes partitioning media data into a plurality of blocks. A transform is applied to the blocks to obtain a plurality of quantization coefficients. The quantization coefficients are sorted into quality layers of decreasing priority based on frequency, wherein each subsequent layer includes data to incrementally increase quality of a reconstructed media data. Quantization coefficients for all blocks are positioned in a media data packet according to quality layer in order of decreasing priority. The media data packet is stored.

    Patch data unit coding and decoding for point-cloud coding
    4.
    发明授权
    Patch data unit coding and decoding for point-cloud coding 有权

    公开(公告)号：US12002243B2

    公开(公告)日：2024-06-04

    申请号：US17466844

    申请日：2021-09-03

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Vladyslav Zakharchenko ,  Jianle Chen ,  Kangying Cai

    IPC: G06T9/00 ,  G06T15/08 ,  H04N19/20 ,  H04N19/54 ,  H04N19/597 ,  H04N19/70

    CPC classification number: G06T9/00 ,  G06T15/08 ,  H04N19/20 ,  H04N19/54 ,  H04N19/597 ,  H04N19/70

    Abstract: A method of point cloud coding (PCC) including receiving encoded patch information data; obtaining a patch corresponding to the encoded patch information data, the patch having a patch type; determining whether the patch type for the patch is a last patch type; and terminating a reconstruction process corresponding to the encoded patch information data when the patch type is the last patch type. Another method includes the same receiving and obtaining steps, but determining whether the patch type for the patch is a skip patch type; decoding a reference patch index corresponding to the patch when the patch type is the skip patch type; determining a reference index for the patch based on a reference frame index corresponding to the patch and the reference patch index as decoded when the patch type is the skip patch type; and reconstructing a volumetric representation of the patch.

    Point Cloud Encoding Method, Point Cloud Decoding Method, Encoder, and Decoder
    6.
    发明申请
    Point Cloud Encoding Method, Point Cloud Decoding Method, Encoder, and Decoder 有权

    公开(公告)号：US20220301229A1

    公开(公告)日：2022-09-22

    申请号：US17712794

    申请日：2022-04-04

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Dejun Zhang ,  Bo Liu ,  Vladyslav Zakharchenko

    IPC: G06T9/00 ,  H04N19/119 ,  H04N19/147 ,  H04N19/184 ,  H04N19/70

    Abstract: A point cloud coding method includes obtaining description information of a bounding box size of a to-be-encoded point cloud and a normal axis of a to-be-encoded patch in the to-be-encoded point cloud, where the description information of the bounding box size of the to-be-encoded point cloud and the normal axis of the to-be-encoded patch are used to determine a tangent axis of the to-be-encoded patch and a bitangent axis of the to-be-encoded patch, and encoding a syntax element into a bitstream, where the syntax element includes an index of the normal axis of the to-be-encoded patch and information for indicating the description information of the bounding box size of the to-be-encoded point cloud, and the syntax element is used to indicate the tangent axis of the to-be-encoded patch and the bitangent axis of the to-be-encoded patch.

    Hybrid Geometric Coding of Point Clouds
    8.
    发明申请
    Hybrid Geometric Coding of Point Clouds 有权

    公开(公告)号：US20210104077A1

    公开(公告)日：2021-04-08

    申请号：US17127329

    申请日：2020-12-18

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Vladyslav Zakharchenko ,  Birendra Kathariya ,  Jianle Chen

    IPC: G06T9/40 ,  H04N19/184

    Abstract: An apparatus comprises a processor configured to obtain a point cloud, make a choice between octree encoding or quadtree encoding of a parent node, and encode the parent node into a bitstream based on the choice; and a transmitter coupled to the processor and configured to transmit the bitstream. An apparatus comprises a receiver configured to receive a bitstream; and a processor coupled to the receiver and configured to parse from the bitstream a first parameter indicating a depth of PCC, decode first nodes before the depth using octree decoding, parse from the bitstream a second parameter indicating a node coding mode for second nodes at and after the depth, and decode the second nodes based on the second parameter.

    Video-based point cloud compression (V-PCC) component synchronization
    10.
    发明授权
    Video-based point cloud compression (V-PCC) component synchronization 有权

    公开(公告)号：US12192498B2

    公开(公告)日：2025-01-07

    申请号：US17714635

    申请日：2022-04-06

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Vladyslav Zakharchenko ,  Jianle Chen ,  Ye-Kui Wang ,  Jeffrey Moguillansky

    IPC: H04N19/44 ,  H04N19/146 ,  H04N19/184 ,  H04N19/597

    Abstract: A method is implemented by a PCC decoder and comprises: receiving, by the PCC decoder, a point cloud bitstream; performing, by the PCC decoder, buffering of the point cloud bitstream based on a time, the performing comprising determining the time based on a delay and a delay offset; and decoding, by the PCC decoder, the point cloud bitstream based on the buffering. A method is implemented by a PCC decoder and comprises: receiving, by the PCC decoder, a point cloud bitstream; performing, by the PCC decoder, buffering of the point cloud bitstream based on a delay, the delay is based on a first delay and a second delay; and decoding, by the PCC decoder, the point cloud bitstream based on the buffering.

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