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    Devices and methods for image and video coding
    24.
    发明授权
    Devices and methods for image and video coding 有权

    公开(公告)号：US11516505B2

    公开(公告)日：2022-11-29

    申请号：US17170065

    申请日：2021-02-08

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Biao Wang ,  Jianle Chen ,  Semih Esenlik ,  Anand Meher Kotra ,  Han Gao ,  Zhijie Zhao

    IPC: H04N19/593 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

    Abstract: The disclosure relates to a method of decoding implemented by a decoding device, comprising: obtaining a value of a reference line index for a current block; constructing a most probable mode, MPM, list for the current block; obtaining a value of intra-prediction mode index for the current block; when the value of the reference line index is not equal to 0, obtaining an intra prediction mode of the current block according to the MPM list for the current block and the value of the intra-prediction mode index for the current block, wherein the value of the intra-prediction mode index indicates a position that corresponds to the intra prediction mode of the current block among angular intra-prediction modes in the MPM list. The disclosure also relates to a coding apparatus and a non-transitory machine-readable medium.

    Motion vector refinement search with integer pixel resolution
    25.
    发明授权
    Motion vector refinement search with integer pixel resolution 有权

    公开(公告)号：US11451824B2

    公开(公告)日：2022-09-20

    申请号：US17135624

    申请日：2020-12-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Semih Esenlik ,  Zhijie Zhao ,  Ivan Krasnov ,  Jianle Chen

    IPC: H04N19/563 ,  H04N19/103 ,  H04N19/176 ,  H04N19/57 ,  H04N19/80 ,  H04N19/172 ,  H04N19/513 ,  H04N19/55 ,  H04N19/56 ,  H04N19/577

    Abstract: An apparatus and method determining a motion vector for a block, which relates to motion vector determination employing template matching or bilateral matching, are provided. At first, candidate motion vectors are obtained and are mapped to respective representatives (representative motion vectors). In particular, if the obtained candidate motion vectors point to fractional positions and thus, interpolation from the integer sample positions is required, the initial motion vector is rounded to a closest integer sample position. The rounded position is then used to define the search space for the template or bilateral matching to determine the best matching motion vector for the block (in other words, a refinement of an initial motion vector around which the candidate space is spanned). Finally, the mapping operation can be reverted in order to obtain a result in the original search space.

    Encoder, a decoder and corresponding methods for inter-prediction
    27.
    发明授权
    Encoder, a decoder and corresponding methods for inter-prediction 有权

    公开(公告)号：US11336916B2

    公开(公告)日：2022-05-17

    申请号：US17317711

    申请日：2021-05-11

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Semih Esenlik ,  Han Gao ,  Anand Meher Kotra ,  Biao Wang ,  Jianle Chen

    IPC: H04N19/56 ,  H04N19/57 ,  H04N19/61

    Abstract: An inter-prediction method and apparatus are provided. An initial motion vector is obtained for a current block. Search space positions are determined according to the initial motion vector. Matching costs for the search space positions are checked according to a checking order to select a target search space position with a minimal matching cost. A refining motion vector of the current block is determined based on the initial motion vector and the target search space position. A central search space position is determined first according to the checking order, and the central search space position is pointed to by the initial motion vector.

    ENCODER, A DECODER AND CORRESPONDING METHODS USING AN ADAPTIVE LOOP FILTER
    30.
    发明申请
    ENCODER, A DECODER AND CORRESPONDING METHODS USING AN ADAPTIVE LOOP FILTER 有权

    公开(公告)号：US20210400267A1

    公开(公告)日：2021-12-23

    申请号：US17356047

    申请日：2021-06-23

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Jianle Chen ,  Han Gao ,  Biao Wang ,  Zhijie Zhao

    IPC: H04N19/117 ,  H04N19/176 ,  H04N19/82 ,  H04N19/96 ,  H04N19/186

    Abstract: A method of filtering a sample value of a picture is provided, with an integer t that is less than k and with an integer j in the range of 1 to m: generating, with an integer i in the range of 1 to k−t−1, a filtered sample value by applying a filter to the value of the sample p(i,j), wherein the filter is supported by a set of filter support samples, the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ greater than k−t−1, and/or generating, with an integer i in the range of k−t to k, a filtered sample value by applying a filter to the value of the sample p(i,j), the filter is supported by a set of filter support samples, wherein the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ less than k−t.

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