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    Point Cloud Compression with Supplemental Information Messages
    1.
    发明公开
    Point Cloud Compression with Supplemental Information Messages 审中-公开

    公开(公告)号：US20230319310A1

    公开(公告)日：2023-10-05

    申请号：US18328954

    申请日：2023-06-05

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Khaled Mammou ,  David W. Singer ,  Fabrice A. Robinet

    IPC: H04N19/597 ,  H04N19/467 ,  H04N21/81 ,  H04N19/20 ,  G06T7/10

    CPC classification number: H04N19/597 ,  H04N19/467 ,  H04N21/8193 ,  H04N19/20 ,  G06T7/10

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. Additionally, an encoder is configured to signal and/or a decoder is configured to receive a supplementary message comprising volumetric tiling information that maps portions of 2D image representations to objects in the point. In some embodiments, characteristics of the object may additionally be signaled using the supplementary message or additional supplementary messages.

    REFERENCE PICTURE RE-SAMPLING
    4.
    发明申请
    REFERENCE PICTURE RE-SAMPLING 有权

    公开(公告)号：US20220248045A1

    公开(公告)日：2022-08-04

    申请号：US17723788

    申请日：2022-04-19

    Applicant: Apple Inc.

    Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David W. Singer

    IPC: H04N19/503 ,  H04N19/86 ,  H04N19/82

    Abstract: Predictive coding techniques may include resampling of reference pictures, where various coding parameters are determined based on the resolution(s) or pixel format(s) of the prediction references. In a first aspect, lists of weights for use in weighted prediction are based on the resolution(s) of prediction references. In a second aspect, resampling filter parameters are selected based on the resolutions of prediction references. In a third aspect, deblocking filter parameters are based on the resolution(s) of prediction references.

    REFERENCE PICTURE MANAGEMENT AND LIST CONSTRUCTION
    5.
    发明申请
    REFERENCE PICTURE MANAGEMENT AND LIST CONSTRUCTION 有权

    公开(公告)号：US20220166969A1

    公开(公告)日：2022-05-26

    申请号：US17540356

    申请日：2021-12-02

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Krishnakanth Rapaka ,  David W. Singer

    IPC: H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/513 ,  H04N19/70

    Abstract: Techniques for encoding video with motion compensation include a compressed bitstream syntax that includes a list of all motion prediction reference frames without distinguishing between short-term reference frame and long-term reference frames. The list of reference frames may be provided in a slice header and may apply to encoded data video data within the corresponding slice. The list may be prefaced with a single number indicating the total number of reference frames. In an aspect delta POC reference numbers may be encoded with a flag indicating the sign of the delta POC when the absolute value of the POC is not equal to zero. In another aspect, a flag may be encoded for every reference frame indicating if POC information should be used when scaling prediction references, and a weighting parameter may be included when POC information should be used.

    Point Cloud Compression with Adaptive Filtering
    6.
    发明申请
    Point Cloud Compression with Adaptive Filtering 有权

    公开(公告)号：US20210256735A1

    公开(公告)日：2021-08-19

    申请号：US17306863

    申请日：2021-05-03

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Khaled Mammou ,  Yeping Su ,  Jungsun Kim ,  Valery G. Valentin ,  David W. Singer ,  Fabrice A. Robinet ,  Hsi-Jung Wu

    IPC: G06T9/00 ,  G06T17/20 ,  H03M7/30 ,  G06T3/40

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A processing/filtering element utilizes occupancy map information and/or auxiliary patch information to determine relationships between patches in image frames and adjusts encoding/decoding and/or filtering or pre/post-processing parameters based on the determined relationships.

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