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    Low-complexity design for FRUC
    12.
    发明授权
    Low-complexity design for FRUC 有权

    公开(公告)号：US10785494B2

    公开(公告)日：2020-09-22

    申请号：US16131860

    申请日：2018-09-14

    Applicant: QUALCOMM Incorporated

    Inventor： Wei-Jung Chien ,  Hsiao-Chiang Chuang ,  Xiang Li ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

    IPC: H04N19/44 ,  H04N19/513 ,  H04N19/577 ,  H04N19/176 ,  H04N19/523 ,  H04N19/56 ,  H04N19/52 ,  H04N19/573

    Abstract: A method of decoding video data includes constructing, by a video decoder implemented in processing circuitry, a candidate list of motion vector information for a portion of a current frame. The method includes receiving, by the video decoder, signaling information indicating starting motion vector information of the candidate list of motion vector information, the starting motion vector information indicating an initial position in a reference frame. The method includes refining, by the video decoder, based on one or more of bilateral matching or template matching, the starting motion vector information to determine refined motion vector information indicating a refined position in the reference frame that is within a search range from the initial position. The method includes generating, by the video decoder, a predictive block based on the refined motion vector information and decoding, by the video decoder, the current frame based on the predictive block.

    Geometry-based priority for the construction of candidate lists
    13.
    发明授权
    Geometry-based priority for the construction of candidate lists 有权

    公开(公告)号：US10721489B2

    公开(公告)日：2020-07-21

    申请号：US15695606

    申请日：2017-09-05

    Applicant: QUALCOMM Incorporated

    Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Li Zhang ,  Kai Zhang ,  Marta Karczewicz

    IPC: H04N19/52 ,  H04N19/13 ,  H04N19/176 ,  H04N19/139 ,  H04N19/174 ,  H04N19/597 ,  H04N19/189

    Abstract: In one example, a device includes a memory configured to store the video data; and one or more processors implemented in circuitry and configured to determine a plurality of distances between a first representative point of a current block of video data and a plurality of second representative points of neighboring blocks to the current block, add one or more of the neighboring blocks as candidates to a candidate list of the current block in an order according to the distances between the first representative point and the second representative points, and code the current block using the candidate list. The candidate list may be, for example, a merge list, an AMVP list, or a most probable mode list. Alternatively, the candidate list may be a list of candidates from which to determine context information for context-adaptive binary arithmetic coding (CABAC).

    Motion information propagation in video coding
    16.
    发明授权
    Motion information propagation in video coding 有权

    公开(公告)号：US10687077B2

    公开(公告)日：2020-06-16

    申请号：US16011340

    申请日：2018-06-18

    Applicant: QUALCOMM Incorporated

    Inventor： Kai Zhang ,  Xiang Li ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

    IPC: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/196 ,  H04N19/159 ,  H04N19/109 ,  H04N19/172

    Abstract: Techniques are directed to a device for decoding a current block of video data in a current coding picture. The device may include a memory configured to store video data. The device may also include a processor configured to generate a first prediction block for the current block of the video data in the current picture according to an intra-prediction mode and generate a second prediction block for the current block of the video data in the current picture the picture according to an inter-prediction mode. The processor may be configured to generate motion information propagated from the second prediction block of the picture to the first prediction block, and use the motion information to obtain a final prediction block, then generate a reconstructed block based on a combination of the final prediction block and a residual block.

    Low-complexity sign prediction for video coding
    18.
    发明授权
    Low-complexity sign prediction for video coding 有权

    公开(公告)号：US10609367B2

    公开(公告)日：2020-03-31

    申请号：US15848759

    申请日：2017-12-20

    Applicant: QUALCOMM Incorporated

    Inventor： Xin Zhao ,  Vadim Seregin ,  Li Zhang ,  Marta Karczewicz ,  Amir Said

    IPC: H04N19/105 ,  H04N19/122 ,  H04N19/124 ,  H04N19/126 ,  H04N19/129 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/51 ,  H04N19/593 ,  H04N19/61

    Abstract: A device includes processing circuitry configured to identify a set of pre-stored residual samples in video data that is stored to a memory, to combine the set of stored residual samples to form a combination, to apply a first sign combination to transform coefficients of the combination to obtain a first hypothesis reconstruction for a current block of the video data, and to apply a second sign combination to the transform coefficients of the combination to obtain a second hypothesis reconstruction for the current block. The processing circuitry is further configured to derive respective cost functions with respect to the first and second hypothesis reconstructions, to compare the respective derived cost functions, to select, based on the comparison, either the first or second hypothesis reconstruction, and to code the current block using a sign prediction associated with the selected one of the first or second hypothesis reconstruction.

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