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    Clipping laser indices in predictive geometry coding for point cloud compression
    231.
    发明授权
    Clipping laser indices in predictive geometry coding for point cloud compression 有权

    公开(公告)号：US12033360B2

    公开(公告)日：2024-07-09

    申请号：US17491114

    申请日：2021-09-30

    Applicant: QUALCOMM Incorporated

    Inventor： Adarsh Krishnan Ramasubramonian ,  Bappaditya Ray ,  Geert Van der Auwera ,  Marta Karczewicz

    IPC: G06T9/00 ,  G01S17/89

    CPC classification number: G06T9/001 ,  G01S17/89

    Abstract: A method of encoding a point cloud includes determining, by one or more processors, a quantity of lasers used to capture light detection and ranging (LIDAR) data that represents the point cloud; and encoding, by the one or more processors, a laser index for a current node of the point cloud, wherein encoding the laser index comprises: obtaining a predicted laser index value of the current node; determining a residual laser index value for the current node, wherein determining the residual laser index value comprises constraining a sum of the residual laser index value and the predicted laser index value to be less than or equal to the determined quantity of lasers minus one; and encoding, in a bitstream, one or more syntax elements that represent the residual laser index value.

    Predictive geometry coding in G-PCC
    233.
    发明授权
    Predictive geometry coding in G-PCC 有权

    公开(公告)号：US11935270B2

    公开(公告)日：2024-03-19

    申请号：US17449013

    申请日：2021-09-27

    Applicant: QUALCOMM Incorporated

    Inventor： Bappaditya Ray ,  Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Marta Karczewicz

    IPC: G06K9/36 ,  G01S7/48 ,  G01S13/42 ,  G06T9/00 ,  G06T9/40

    CPC classification number: G06T9/001 ,  G01S7/4808 ,  G01S13/42 ,  G06T9/40 ,  G01S7/4802

    Abstract: An example method of decoding a point cloud includes selecting, from a plurality of predefined prediction modes, a prediction mode for performing predictive geometry coding of a position of a current node of the point cloud, wherein the plurality of prediction modes includes at least: a zero prediction mode, and a delta prediction mode; responsive to selecting the zero prediction mode: determining a radius, an azimuth, and a laser index of a parent node of the current node; inferring an azimuth and a laser index of a predicted position of the current node as the azimuth and the laser index of the parent node; inferring a radius of the predicted position to be a minimum radius value, wherein the minimum radius value is different than the radius of the parent node; and determining, based on the predicted position of the current node, the position of the current node.

    Position-dependent intra-inter prediction combination in video coding
    235.
    发明授权
    Position-dependent intra-inter prediction combination in video coding 有权

    公开(公告)号：US11831875B2

    公开(公告)日：2023-11-28

    申请号：US17804329

    申请日：2022-05-27

    Applicant: QUALCOMM Incorporated

    Inventor： Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz ,  Luong Pham Van

    IPC: H04N19/126 ,  H04N19/176 ,  H04N19/593 ,  H04N19/503

    CPC classification number: H04N19/126 ,  H04N19/176 ,  H04N19/503 ,  H04N19/593

    Abstract: A device for coding video data includes a processor configured to generate an inter-prediction block and an intra-prediction block for a current block of video data; for each sample of a prediction block to be generated: determine a first weight for the sample according to a position of the sample in the prediction block; determine a second weight for the sample according to the position of the sample in the prediction block; apply the first weight to a sample at the position in the inter-prediction block to generate a weighted inter-prediction sample; apply the second weight to a sample at the position in the intra-prediction block to generate a weighted intra-prediction sample; and calculate a value for the sample at the position in the prediction block using the weighted inter-prediction sample and the weighted intra-prediction sample; and code the current block using the prediction block.

    PREDICTION FOR GEOMETRY POINT CLOUD COMPRESSION
    238.
    发明公开
    PREDICTION FOR GEOMETRY POINT CLOUD COMPRESSION 审中-公开

    公开(公告)号：US20230230290A1

    公开(公告)日：2023-07-20

    申请号：US18155480

    申请日：2023-01-17

    Applicant: QUALCOMM Incorporated

    Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Luong Pham Van ,  Marta Karczewicz

    IPC: G06T9/40

    CPC classification number: G06T9/40

    Abstract: A method comprises: for each of a plurality of dimensions: identifying a reference position for the dimension, the reference position for the dimension being a position in a reference frame for the respective dimension, and the reference frame for the respective dimension and a reference frame for at least one other dimension in the plurality of dimensions being different reference frames in a plurality of reference frames; identifying an inter predictor for the respective dimension, wherein a predictor has a coordinate value in the respective dimension corresponding to a coordinate value in the respective dimension of the inter predictor for the respective dimension; and encoding or decoding the current point based on the predictor.

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