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    Bit Stream Structure for Compressed Point Cloud Data
    41.
    发明公开
    Bit Stream Structure for Compressed Point Cloud Data 审中-公开

    公开(公告)号：US20230232044A1

    公开(公告)日：2023-07-20

    申请号：US18189099

    申请日：2023-03-23

    Applicant: Apple Inc.

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

    IPC: H04N19/597 ,  H04N19/17

    CPC classification number: H04N19/597 ,  H04N19/17 ,  G06T9/00

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information 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. In some embodiments, a bit stream structure may be used to communicate compressed point cloud data. The bit stream structure may include point cloud compression network abstraction layer (PCCNAL) units that enable use of groups of frames (GOFs), frame, and sub-frame signaling of patch information. Such a bit stream structure may permit low delay streaming and random access reconstruction of point clouds amongst other applications.

    Reference picture management and list construction
    44.
    发明授权
    Reference picture management and list construction 有权

    公开(公告)号：US11196988B2

    公开(公告)日：2021-12-07

    申请号：US16669385

    申请日：2019-10-30

    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.

    Bit stream structure for compressed point cloud data
    46.
    发明授权
    Bit stream structure for compressed point cloud data 有权

    公开(公告)号：US11012713B2

    公开(公告)日：2021-05-18

    申请号：US16510706

    申请日：2019-07-12

    Applicant: Apple Inc.

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

    IPC: H04N19/597 ,  H04N19/17

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information 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. In some embodiments, a bit stream structure may be used to communicate compressed point cloud data. The bit stream structure may include point cloud compression network abstraction layer (PCCNAL) units that enable use of groups of frames (GOFs), frame, and sub-frame signaling of patch information. Such a bit stream structure may permit low delay streaming and random access reconstruction of point clouds amongst other applications.

    Coding of video and audio with initialization fragments
    47.
    发明授权
    Coding of video and audio with initialization fragments 有权

    公开(公告)号：US10992946B2

    公开(公告)日：2021-04-27

    申请号：US16293487

    申请日：2019-03-05

    Applicant: Apple Inc.

    Inventor： David W. Singer

    IPC: H04N19/46 ,  H04N19/70 ,  H04N19/114 ,  H04N19/177

    Abstract: A new file format for coded video data is provided. A decoder may identify patterns in the coded video data in order to make the decoding process and/or display of data more efficient. Such patterns may be predefined and stored at the decoder, may be defined by each encoder and exchanged during terminal initialization, or may be transmitted and/or stored with the associated video data. Initialization information associated with the fragments of video data may also provide for carouseling initialization updates such that the initialization fragments may indicate either that the initialization information should be updated or that the decoder should be re-initialized. Additionally, media files or segments may be broken into fragments and each segment may have an index to provide for random access to the media data of the segment.

    BIT STREAM STRUCTURE FOR COMPRESSED POINT CLOUD DATA
    48.
    发明申请
    BIT STREAM STRUCTURE FOR COMPRESSED POINT CLOUD DATA 审中-公开

    公开(公告)号：US20200021847A1

    公开(公告)日：2020-01-16

    申请号：US16510706

    申请日：2019-07-12

    Applicant: Apple Inc.

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

    IPC: H04N19/597 ,  H04N19/17

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information 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. In some embodiments, a bit stream structure may be used to communicate compressed point cloud data. The bit stream structure may include point cloud compression network abstraction layer (PCCNAL) units that enable use of groups of frames (GOFs), frame, and sub-frame signaling of patch information. Such a bit stream structure may permit low delay streaming and random access reconstruction of point clouds amongst other applications.

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