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    Point cloud compression
    3.
    发明授权
    Point cloud compression 有权

    公开(公告)号：US11527018B2

    公开(公告)日：2022-12-13

    申请号：US17157833

    申请日：2021-01-25

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su

    IPC: G06T9/00 ,  H03M7/30

    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.

    Point cloud compression with multi-layer projection
    5.
    发明授权
    Point cloud compression with multi-layer projection 有权

    公开(公告)号：US11282238B2

    公开(公告)日：2022-03-22

    申请号：US17032711

    申请日：2020-09-25

    Applicant: Apple Inc.

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

    IPC: G06T7/20 ,  G06T9/00 ,  G06T7/50 ,  H04N19/172 ,  G06T5/00 ,  G06T19/20

    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. The encoder is configured project the point cloud on to patch planes to compress the point cloud, and supports multiple layered patch planes. For example, some point clouds may have a depth, and points at different depths may be assigned to different layered patch planes.

    CONTENT ADAPTATION FOR STREAMING
    6.
    发明申请
    CONTENT ADAPTATION FOR STREAMING 有权

    公开(公告)号：US20220030244A1

    公开(公告)日：2022-01-27

    申请号：US17492789

    申请日：2021-10-04

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Xingyu Zhang ,  Chris Chung ,  Jun Xin ,  Hsi-Jung Wu

    IPC: H04N19/136 ,  H04N19/103 ,  G06N20/00 ,  H04N19/179

    Abstract: Techniques are disclosed by which a coding parameter is determined to encode video data resulting in encoded video data possessing a highest possible video quality. Features may be extracted from an input video sequence. The extracted features may be compared to features described in a model of coding parameters generated by a machine learning algorithm from reviews of previously-coded videos, extracted features of the previously-coded videos, and coding parameters of the previously-coded videos. When a match is detected between the extracted features of the input video sequence and extracted features represented in the model, a determination may be made as to whether coding parameters that correspond to the matching extracted feature correspond to a tier of service to which the input video sequence is to be coded. When the coding parameters that correspond to the matching extracted feature correspond to the tier of service to which the input video sequence is to be coded, the input video sequence may be coded according to the coding parameters.

    Multidimensional quantization techniques for video coding/decoding systems
    7.
    发明授权
    Multidimensional quantization techniques for video coding/decoding systems 有权

    公开(公告)号：US11153594B2

    公开(公告)日：2021-10-19

    申请号：US15250608

    申请日：2016-08-29

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

    IPC: H04N19/50 ,  H04N19/184 ,  H04N19/167 ,  H04N19/436 ,  H04N19/186 ,  H04N19/132 ,  H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/30 ,  H04N19/42 ,  H04N19/48 ,  H04N19/182

    Abstract: Video compression and decompression techniques are disclosed that provide improved bandwidth control for video compression and decompression systems. In particular, video coding and decoding techniques quantize input video in multiple dimensions. According to these techniques, pixel residuals may be generated from a comparison of an array of input data to an array of prediction data. The pixel residuals may be quantized in a first dimension. After the quantization, the quantized pixel residuals may be transformed to an array of transform coefficients. The transform coefficients may be quantized in a second dimension and entropy coded. Decoding techniques invert these processes. In still other embodiments, multiple quantizers may be provided upstream of the transform stage, either in parallel or in cascade, which provide greater flexibility to video coders to quantize data in different dimensions in an effort to balance the competing interest in compression efficiency and quality of reconstructed video.

    Point Cloud Compression
    9.
    发明申请
    Point Cloud Compression 有权

    公开(公告)号：US20210150766A1

    公开(公告)日：2021-05-20

    申请号：US17163188

    申请日：2021-01-29

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Valery G. Valentin ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su ,  Jungsun Kim

    IPC: G06T9/00 ,  G06T17/00

    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. In some embodiments, an encoder may be configured to further compress points omitted from the image based representation. Also, in some embodiments, a decoder may be configured to decode points compressed outside of an image based representation or in a separate image based representation.

    HIERARCHICAL POINT CLOUD COMPRESSION
    10.
    发明申请
    HIERARCHICAL POINT CLOUD COMPRESSION 有权

    公开(公告)号：US20210119640A1

    公开(公告)日：2021-04-22

    申请号：US17133394

    申请日：2020-12-23

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su

    IPC: H03M7/30 ,  H04N19/96 ,  H04N19/436 ,  H04N19/60 ,  H04N19/597

    Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information for the point cloud. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values used to correct predicted attribute values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points and distances between a particular point for whom an attribute value is being predicted and the neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file.

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