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    Geometric partition mode with harmonized motion field storage and motion compensation
    43.
    发明授权
    Geometric partition mode with harmonized motion field storage and motion compensation 有权

    公开(公告)号：US11570434B2

    公开(公告)日：2023-01-31

    申请号：US16998639

    申请日：2020-08-20

    Applicant: QUALCOMM Incorporated

    Inventor： Kevin Pascal Andre Reuze ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/119 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

    Abstract: A method of decoding video data includes determining that a geometric partition mode is enabled for a current block of the video data and determining a split line dividing the current block into a first partition and a second partition, where determining the split line comprises selecting an angle for the split line from a plurality of angles, Each angle of the plurality of angles corresponding to an N:M ratio of samples of the current block, where N and M are integers. The split line is not at a corner of the current block. The method further includes determining geometric mode weights for the current block using the angle of the split line, generating a first prediction block using motion information for the first partition, and generating a second prediction block using motion information for the second partition.

    VIDEO CODING USING OVERLAPPED BLOCK MOTION COMPENSATION, COMBINED INTER-INTRA PREDICTION, AND/OR LUMA MAPPING AND CHROMA SCALING
    45.
    发明申请
    VIDEO CODING USING OVERLAPPED BLOCK MOTION COMPENSATION, COMBINED INTER-INTRA PREDICTION, AND/OR LUMA MAPPING AND CHROMA SCALING 有权

    公开(公告)号：US20220394239A1

    公开(公告)日：2022-12-08

    申请号：US17662140

    申请日：2022-05-05

    Applicant: QUALCOMM Incorporated

    Inventor： Han Huang ,  Yao-Jen Chang ,  Vadim Seregin ,  Chun-Chi Chen ,  Marta Karczewicz

    IPC: H04N19/105 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

    Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured to: generate an inter-prediction block for a current block of video data; generate an intra-prediction block for the current block of video data; generate a final prediction block for the current block of video data from the inter-prediction block and the intra-prediction block, including performing each of combined inter/intra prediction (CIIP) mode, overlapped block motion compensation (OBMC), and luma mapping with chroma scaling (LMCS) while generating the final prediction block; and decode the current block of video data using the final prediction block. To generate the final prediction block, the processors may perform LMCS on a first inter-prediction sub-block, combine the LMCS-mapped first inter-prediction sub-block with the intra-prediction block using CIIP, and perform OBMC between the first CIIP prediction block and a second inter-prediction sub-block.

    ADAPTIVELY CODING MOTION INFORMATION FOR MULTIPLE HYPOTHESIS PREDICTION FOR VIDEO CODING
    46.
    发明申请
    ADAPTIVELY CODING MOTION INFORMATION FOR MULTIPLE HYPOTHESIS PREDICTION FOR VIDEO CODING 有权

    公开(公告)号：US20220311997A1

    公开(公告)日：2022-09-29

    申请号：US17655919

    申请日：2022-03-22

    Applicant: QUALCOMM Incorporated

    Inventor： Han Huang ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    Abstract: An example device for decoding video data includes one or more processors configured to: generate a first prediction block for a current block of video data using a base inter-prediction mode; code a merge mode syntax element for a second prediction block representing an additional prediction hypothesis, the merge mode syntax element indicating whether motion information for the second prediction block is coded using merge mode; code the motion information for the second prediction block according to the merge mode syntax element, wherein to code the motion information, the one or more processors are configured to form a merge candidate list including merge candidates representing respective sets of uni-prediction motion information; generate the second prediction block for the current block of video data using the motion information; form a multi-hypothesis prediction block from the first and second prediction blocks; and decode the current block using the multi-hypothesis prediction block.

    MODEL-BASED MOTION VECTOR DIFFERENCE DERIVATION AND TEMPLATE MATCHING PREDICTION FOR VIDEO CODING
    47.
    发明申请
    MODEL-BASED MOTION VECTOR DIFFERENCE DERIVATION AND TEMPLATE MATCHING PREDICTION FOR VIDEO CODING 有权

    公开(公告)号：US20220248047A1

    公开(公告)日：2022-08-04

    申请号：US17586492

    申请日：2022-01-27

    Applicant: QUALCOMM Incorporated

    Inventor： Chun-Chi Chen ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/523 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105 ,  H04N19/513

    Abstract: An example device for decoding video data includes a memory configured to store video data; and one or more processors configured to: decode data representing an initial motion vector for a current block of the video data, the initial motion vector having integer-motion vector difference (MVD) precision; determine a search range around a reference area identified by the initial motion vector in a reference picture; perform a template matching search process in the search range to identify a best matching region; determine error values for neighboring pixels to the best matching region; use the error values for the neighboring pixels to perform a model-based fractional-pixel motion vector refinement to derive motion vector difference values; apply at least one of the motion vector difference values to the initial motion vector to determine a refined motion vector for the current block; and decode the current block using the refined motion vector.

    Affine motion prediction
    50.
    发明授权
    Affine motion prediction 有权

    公开(公告)号：US11140408B2

    公开(公告)日：2021-10-05

    申请号：US16572391

    申请日：2019-09-16

    Applicant: QUALCOMM Incorporated

    Inventor： Han Huang ,  Wei-Jung Chien ,  Marta Karczewicz

    IPC: H04N19/52 ,  H04N19/15 ,  H04N19/169 ,  H04N19/176 ,  G06T3/00 ,  H04N19/46 ,  H04N19/96

    Abstract: Systems and techniques for improving costs and efficiency in affine motion prediction of a current block includes storing motion information of previously coded block in a line buffer or one or more local buffers of a coding unit such as coding tree unit (CTU). The line buffer can store motion information of a line of coding blocks located at a boundary of the CTU, while the local buffers can be utilized for storing motion information of coding blocks located anywhere in the CTU. The utilization of the line buffer can be improved by limiting the number of motion vectors of a neighboring block stored in the line buffer and obtaining remaining motion vectors from an additional block when available. The utilization of local buffers can be improved by restricting a size of neighboring blocks whose motion information is stored in the local buffers.

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