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    VIDEO CODING WITH CONTENT ADAPTIVE SPATIALLY VARYING QUANTIZATION
    21.
    发明申请
    VIDEO CODING WITH CONTENT ADAPTIVE SPATIALLY VARYING QUANTIZATION 有权

    公开(公告)号：US20220124332A1

    公开(公告)日：2022-04-21

    申请号：US17395133

    申请日：2021-08-05

    Applicant: QUALCOMM Incorporated

    Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian

    IPC: H04N19/126 ,  H04N19/36 ,  H04N19/196 ,  H04N19/463 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

    Abstract: A video encoder may be configured to apply a multi-stage quantization process, where residuals are first quantized using an effective quantization parameter derived from the statistics of the samples of the block. The residual is then further quantized using a base quantization parameter that is uniform across a picture. A video decoder may be configured to decode the video data using the base quantization parameter. The video decoder may further be configured to estimate the effective quantization parameter from the statistics of the decoded samples of the block. The video decoder may then use the estimated effective quantization parameter for use in determining parameters for other coding tools, including filters.

    ANGULAR MODE AND IN-TREE QUANTIZATION IN GEOMETRY POINT CLOUD COMPRESSION
    22.
    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
    23.
    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
    24.
    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.

    ANGULAR MODE SIMPLIFICATION FOR GEOMETRY-BASED POINT CLOUD COMPRESSION
    28.
    发明申请
    ANGULAR MODE SIMPLIFICATION FOR GEOMETRY-BASED POINT CLOUD COMPRESSION 有权

    公开(公告)号：US20210327095A1

    公开(公告)日：2021-10-21

    申请号：US17224608

    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: G06T9/00 ,  G06T9/40 ,  G06T17/20 ,  G01S17/89

    Abstract: A method of decoding point cloud data comprises obtaining a bitstream that includes an arithmetically encoded syntax element indicating a vertical plane position of a planar mode of a node; and decoding the vertical plane position of the planar mode in the node, wherein decoding the vertical plane position of the planar mode 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 the vertical plane position of the planar mode using a context indicated by the determined context index.

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