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    CODING METHOD AND APPARATUS
    221.
    发明申请
    CODING METHOD AND APPARATUS 有权

    公开(公告)号：US20220191534A9

    公开(公告)日：2022-06-16

    申请号：US16849354

    申请日：2020-04-15

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

    IPC: H04N19/51 ,  H04N19/176 ,  H04N19/184 ,  H04N19/124 ,  H04N19/61

    Abstract: The present disclosure discloses a video decoding method, including: parsing a received bitstream to obtain prediction information of a CU; obtaining a target transform mode of a residual TU; parsing the received bitstream to obtain transform coefficients of the residual TU; applying an inverse quantization to the transform coefficients of the residual TU to obtain dequantized coefficients; applying, based on the target transform mode, an inverse transform to the dequantized coefficients to obtain a residual block of the residual TU; obtaining a prediction block of the CU based on the prediction information; and obtaining a video block based on the residual block and the prediction block; and outputting a video sequence, the video sequence including a video frame that includes the video block.

    Encoder, a decoder and corresponding methods for inter-prediction
    223.
    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.

    MOTION VECTOR PREDICTION METHOD AND RELATED APPARATUS
    225.
    发明申请
    MOTION VECTOR PREDICTION METHOD AND RELATED APPARATUS 有权

    公开(公告)号：US20220078443A1

    公开(公告)日：2022-03-10

    申请号：US17525944

    申请日：2021-11-14

    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

    Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Jiali Fu

    IPC: H04N19/139 ,  H04N19/119 ,  H04N19/176 ,  H04N19/61

    Abstract: A motion vector prediction method includes parsing a bitstream to obtain an index value of a candidate motion vector list and constructing the candidate motion vector list that includes. candidate motion vectors of K control points of a current block. The candidate motion vectors of K control points are obtained based on a 2N-parameter affine transform model used for a neighboring block of the current block, where N and K are integers greater than or equal to 2 and less than or equal to 4 with N not being equal to K. The method further includes determining, in the candidate motion vector list, target candidate motion vectors of the K control points based on the index value and obtaining a predicted motion vector of each subblock of the current block based on the target candidate motion vectors of the K control points.

    Spatially varying transform with adaptive transform type
    226.
    发明授权
    Spatially varying transform with adaptive transform type 有权

    公开(公告)号：US11252426B2

    公开(公告)日：2022-02-15

    申请号：US17104866

    申请日：2020-11-25

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

    IPC: H04N11/02 ,  H04N19/44 ,  H04N19/136 ,  H04N19/176 ,  H04N19/625

    Abstract: A video decoding method and apparatus employing spatially varying transform (SVT) with adaptive transform type include determining a usage of an SVT-vertical (V) or an SVT-horizontal (H) for a residual block, determining a transform block position of a transform block of the residual block, determining a transform type of the transform block, wherein the transform type indicates a horizontal transform and a vertical transform for the transform block, wherein at least one of the horizontal transform or the vertical transform is a discrete sine transform (DST)-7, and reconstructing the residual block based on the transform type, the transform block position and transform coefficients of the transform block.

    ENCODER, A DECODER AND CORRESPONDING METHODS USING AN ADAPTIVE LOOP FILTER
    228.
    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.

    Motion vector prediction method and related apparatus
    229.
    发明授权
    Motion vector prediction method and related apparatus 有权

    公开(公告)号：US11206408B2

    公开(公告)日：2021-12-21

    申请号：US17140041

    申请日：2021-01-01

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Jiali Fu

    IPC: H04N19/139 ,  H04N19/119 ,  H04N19/176 ,  H04N19/61

    Abstract: A method includes: parsing a bitstream to obtain an index value of a candidate motion vector list; constructing the candidate motion vector list, where the candidate motion vector list includes candidate motion vectors of K control points of a current block, the candidate motion vectors of the K control points are obtained based on a 2N-parameter affine transform model used for a neighboring block of the current block, N, K are integers greater than or equal to 2 and less than or equal to 4, and N is not equal to K; determining, in the candidate motion vector list, target candidate motion vectors of the K control points based on the index value; and obtaining a predicted motion vector of each subblock of the current block based on the target candidate motion vectors of the K control points. It helps improve coding efficiency in an audio and video coding process.

    DEBLOCKING FILTER FOR SUB-PARTITION BOUNDARIES CAUSED BY INTRA SUB-PARTITION CODING TOOL
    230.
    发明申请
    DEBLOCKING FILTER FOR SUB-PARTITION BOUNDARIES CAUSED BY INTRA SUB-PARTITION CODING TOOL 有权

    公开(公告)号：US20210377570A1

    公开(公告)日：2021-12-02

    申请号：US17399203

    申请日：2021-08-11

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

    IPC: H04N19/66 ,  H04N19/176 ,  H04N19/593 ,  H04N19/80

    Abstract: A deblocking method is provided for deblocking a sub-partition boundary within a coding block during image encoding and/or image decoding process. The coding block is coded in an intra prediction mode and the coding block is partitioned into sub-partitions comprising a first sub-partition and a second sub-partition that is adjacent to the first sub-partition. The method comprises: determining a maximum filter length to be 1 for a first/second sub-partition when a width of the first or second sub-partition is 4 samples, or when a height of the first or second sub-partition is 4 samples; modifying a value of up to one sample of the first or second sub-partition, wherein the value of the up to one sample is obtained from a row or a column of the first or second sub-partition that is perpendicular to and adjacent to the sub-partitions boundary between the first sub-partition and the second sub-partition.

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