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    TEMPLATE SELECTION FOR INTRA PREDICTION IN VIDEO CODING
    1.
    发明公开
    TEMPLATE SELECTION FOR INTRA PREDICTION IN VIDEO CODING 审中-公开

    公开(公告)号：US20240015280A1

    公开(公告)日：2024-01-11

    申请号：US18338756

    申请日：2023-06-21

    Applicant: QUALCOMM Incorporated

    Inventor： Yao-Jen Chang ,  Keming Cao ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

    CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

    Abstract: A method of coding video data comprises determining, based on a comparison of a threshold and a quantity of reference samples in a selected template, whether the selected template is allowed, wherein a mode index indicates which template from among a plurality of templates is the selected template, wherein each of the templates includes a different set of reconstructed samples that neighbor a current coding unit (CU) of a current picture of the video data; based on determining that the selected template is allowed and that a convolutional cross-component model (CCCM) mode is to be used, applying the CCCM mode to predict chroma samples of the current CU based on reconstructed luma samples of the current CU and the reference samples in the selected template; and; and encoding or decoding the current CU based on the predicted chroma samples of the current CU.

    BLOCK VECTOR DIFFERENCE BINARIZATION AND CODING IN VIDEO CODING
    2.
    发明公开
    BLOCK VECTOR DIFFERENCE BINARIZATION AND CODING IN VIDEO CODING 审中-公开

    公开(公告)号：US20230328272A1

    公开(公告)日：2023-10-12

    申请号：US18177591

    申请日：2023-03-02

    Applicant: QUALCOMM Incorporated

    Inventor： Keming Cao ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/513 ,  H04N19/70

    CPC classification number: H04N19/521 ,  H04N19/70

    Abstract: A method of encoding or decoding video data includes determining that a block vector difference (BVD) value is non-zero, wherein the BVD value is indicative of a difference between a block vector for a current block of the video data and a block vector predictor, and wherein the block vector points to a reference block based on samples in a same picture as the current block; and encoding or decoding a value for the BVD value, without signaling or parsing syntax information indicating whether an absolute value of the BVD value is greater than one.

    Derived intra prediction modes and most probable modes in video coding
    4.
    发明授权
    Derived intra prediction modes and most probable modes in video coding 有权

    公开(公告)号：US12192469B2

    公开(公告)日：2025-01-07

    申请号：US17804972

    申请日：2022-06-01

    Applicant: QUALCOMM Incorporated

    Inventor： Keming Cao ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N11/02 ,  H04N19/105 ,  H04N19/132 ,  H04N19/146 ,  H04N19/159 ,  H04N19/176

    Abstract: A method of encoding or decoding video data comprises: for each respective intra prediction mode of a plurality of intra prediction modes in a most-probable mode (MPM) list: generating, based on reference samples for a template region and using the respective intra prediction mode, prediction samples for the template region; and determining a cost for the respective intra prediction mode; determining a first intra prediction mode and a second intra prediction mode in the MPM list having lowest costs; determining a preliminary prediction block for the first intra prediction mode and a preliminary prediction block for the second intra prediction mode; generating a prediction block based on a fusion of the preliminary prediction blocks weighted according to a weight for the first intra prediction mode and a weight for the second intra prediction mode.

    INTRA CHROMA MODE LIST CONSTRUCTION FOR VIDEO CODING
    5.
    发明公开
    INTRA CHROMA MODE LIST CONSTRUCTION FOR VIDEO CODING 审中-公开

    公开(公告)号：US20230336716A1

    公开(公告)日：2023-10-19

    申请号：US18187517

    申请日：2023-03-21

    Applicant: QUALCOMM Incorporated

    Inventor： Yao-Jen Chang ,  Keming Cao ,  Bappaditya Ray ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/186 ,  H04N19/11 ,  H04N19/176

    CPC classification number: H04N19/11 ,  H04N19/176 ,  H04N19/186

    Abstract: A method of encoding or decoding video data includes constructing a list of chroma intra-prediction modes for a chroma block of a current block of the video data, wherein constructing includes adding intra-prediction modes of a first group to the list of chroma intra-prediction modes, the first group comprising two or more intra-prediction modes derived from intra-prediction modes of two or more co-located luma blocks of the current block that are co-located with the chroma block; determining an intra-prediction mode for the chroma block from the list of chroma intra-prediction modes; and encoding or decoding the chroma block based on the intra-prediction mode.

    INTRA-MODE DEPENDENT MULTIPLE TRANSFORM SELECTION FOR VIDEO CODING
    6.
    发明申请
    INTRA-MODE DEPENDENT MULTIPLE TRANSFORM SELECTION FOR VIDEO CODING 有权

    公开(公告)号：US20220329800A1

    公开(公告)日：2022-10-13

    申请号：US17658803

    申请日：2022-04-11

    Applicant: QUALCOMM Incorporated

    Inventor： Bappaditya Ray ,  Muhammed Zeyd Coban ,  Louis Joseph Kerofsky ,  Vadim Seregin ,  Marta Karczewicz ,  Keming Cao

    IPC: H04N19/12 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine a size of a current block of video data; determine an intra-prediction mode for the current block of video data; determine a mode group including the determined intra-prediction mode, the mode group being one of a plurality of mode groups, each including respective sets of intra-prediction modes; determine a set of available multiple transform selection (MTS) schemes for the current block according to the size and the intra-prediction mode for the current block; determine an MTS scheme from the set of available MTS schemes according to the determined mode group; apply transforms of the MTS scheme to a transform block of the current block to produce a residual block for the current block; and decode the current block using the residual block.

    DERIVED INTRA PREDICTION MODES AND MOST PROBABLE MODES IN VIDEO CODING
    9.
    发明申请
    DERIVED INTRA PREDICTION MODES AND MOST PROBABLE MODES IN VIDEO CODING 有权

    公开(公告)号：US20220394269A1

    公开(公告)日：2022-12-08

    申请号：US17804972

    申请日：2022-06-01

    Applicant: QUALCOMM Incorporated

    Inventor： Keming Cao ,  Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/146 ,  H04N19/159 ,  H04N19/176

    Abstract: A method of encoding or decoding video data comprises: for each respective intra prediction mode of a plurality of intra prediction modes in a most-probable mode (MPM) list: generating, based on reference samples for a template region and using the respective intra prediction mode, prediction samples for the template region; and determining a cost for the respective intra prediction mode; determining a first intra prediction mode and a second intra prediction mode in the MPM list having lowest costs; determining a preliminary prediction block for the first intra prediction mode and a preliminary prediction block for the second intra prediction mode; generating a prediction block based on a fusion of the preliminary prediction blocks weighted according to a weight for the first intra prediction mode and a weight for the second intra prediction mode.

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