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    Angular mode simplification for geometry-based point cloud compression
    12.
    发明授权
    Angular mode simplification for geometry-based point cloud compression 有权

    公开(公告)号：US11580672B2

    公开(公告)日：2023-02-14

    申请号：US17224709

    申请日：2021-04-07

    Applicant: QUALCOMM Incorporated

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

    IPC: G06T9/40

    Abstract: A method of decoding point cloud data comprises obtaining a bitstream that includes an arithmetically encoded syntax element indicating a vertical point position offset within a node of a tree that represents 3-dimensional positions of points in a point cloud represented by the point cloud data; and decoding the vertical point position offset, wherein decoding the vertical point position offset comprises: determining a laser index of a laser candidate in a set of laser candidates, wherein the determined laser index indicates a laser beam that intersects the node; determining a context index based on whether the laser beam is above a first distance threshold, between the first distance threshold and a second distance threshold, between the second distance threshold and a third distance threshold, or below the third distance threshold; and arithmetically decoding a bin of the vertical point position offset using a context indicated by the determined context index.

    POSITION-DEPENDENT INTRA-INTER PREDICTION COMBINATION IN VIDEO CODING
    14.
    发明申请
    POSITION-DEPENDENT INTRA-INTER PREDICTION COMBINATION IN VIDEO CODING 有权

    公开(公告)号：US20220286680A1

    公开(公告)日：2022-09-08

    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

    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.

    AFFINE LINEAR WEIGHTED INTRA PREDICTION IN VIDEO CODING
    15.
    发明申请
    AFFINE LINEAR WEIGHTED INTRA PREDICTION IN VIDEO CODING 有权

    公开(公告)号：US20220248035A1

    公开(公告)日：2022-08-04

    申请号：US17653086

    申请日：2022-03-01

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/176 ,  H04N19/159 ,  H04N19/11

    Abstract: A video coder performs a Most-Probable Mode (MPM) derivation process that derives one or more MPMs for a current block that is not coded using affine linear weighted intra prediction (ALWIP). As part of performing the MPM derivation process, the video coder determines whether a neighboring block of the current block is an ALWIP-coded neighboring block. Based on the neighboring block being an ALWIP-coded neighboring block, the video coder determines that a value of an intra prediction mode of the neighboring block is a value indicating a planar mode. The video coder codes the current block based on one of the MPMs for the current block.

    ANGULAR MODE AND IN-TREE QUANTIZATION IN GEOMETRY POINT CLOUD COMPRESSION
    17.
    发明申请
    ANGULAR MODE AND IN-TREE QUANTIZATION IN GEOMETRY POINT CLOUD COMPRESSION 有权

    公开(公告)号：US20220108488A1

    公开(公告)日：2022-04-07

    申请号：US17495621

    申请日：2021-10-06

    Applicant: QUALCOMM Incorporated

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

    IPC: G06T9/00 ,  G06T9/40 ,  G01S17/89

    Abstract: A device for decoding a bitstream that includes point cloud data can be configured to determine, based on syntax signaled in the bitstream, that in-tree quantization is enabled for a node; determine, for the node based on the syntax signaled in the bitstream, that an angular mode is activated for the node; in response to in-tree quantization being enabled for the node, determine for the node a quantized value representing a coordinate position relative to an origin position; scale the quantized value without clipping to determine a scaled value representing the coordinate position relative to the origin position; and determine a context for context decoding a plane position syntax element for the angular mode based on the scaled value representing the coordinate position relative to the origin position.

    Increasing decoding throughput of intra-coded blocks
    18.
    发明授权
    Increasing decoding throughput of intra-coded blocks 有权

    公开(公告)号：US11277618B2

    公开(公告)日：2022-03-15

    申请号：US16905467

    申请日：2020-06-18

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186

    Abstract: A method of decoding video data includes determining, by one or more processors implemented in circuitry, a picture size of a picture. The picture size applies a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of a maximum of 8 and a minimum coding unit size for the picture. The method further includes determining, by the one or more processors, a partition of the picture into a plurality of blocks and generating, by the one or more processors, a prediction block for a block of the plurality of blocks. The method further includes decoding, by the one or more processors, a residual block for the block and combining, by the one or more processors, the prediction block and the residual block to decode the block.

    POSITION-DEPENDENT INTRA-INTER PREDICTION COMBINATION IN VIDEO CODING
    19.
    发明申请
    POSITION-DEPENDENT INTRA-INTER PREDICTION COMBINATION IN VIDEO CODING 有权

    公开(公告)号：US20220007010A1

    公开(公告)日：2022-01-06

    申请号：US17479482

    申请日：2021-09-20

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/423 ,  H04N19/136 ,  H04N19/132

    Abstract: An example device for coding (encoding or decoding) video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine a first number of neighboring blocks to a current block of the video data that are intra-predicted; determine a second number of the neighboring blocks that are inter-predicted; determine a first weight value to be applied to intra-prediction samples of an intra-prediction block for the current block; determine a second weight value to be applied to inter-prediction samples of an inter-prediction block for the current block; generate a prediction block for the current block as a weighted combination of the intra-prediction block to which the first weight value is applied and the inter-prediction block to which the second weight value is applied; and code the current block using the prediction block.

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