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    In-loop deblocking filter apparatus and method for video coding
    203.
    发明授权
    In-loop deblocking filter apparatus and method for video coding 有权

    公开(公告)号：US11259054B2

    公开(公告)日：2022-02-22

    申请号：US17134442

    申请日：2020-12-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

    IPC: H04N11/02 ,  H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/14 ,  H04N19/176 ,  H04N19/86

    Abstract: An in-loop deblocking filter apparatus (120) for processing a current row or column of samples into a filtered row or column of samples. The current row or column of samples comprises a plurality of samples from a first sample block and a horizontally or vertically neighboring second sample block of a reconstructed picture of a video stream. The samples of the current row or column of samples have sample values pN−1−p0, q0−qN−1 wherein N is an even integer greater than 2. If a first condition or a second condition is satisfied, the current row or column is processed by: determining a filtered sample value q0′ by applying a (2N−1)-tap filter to the sample values pN−2, . . . , p0, q0, . . . , qN−1 of the current row or column; and/or determining a filtered sample value p0′ by applying a (2N−1)-tap filter to the sample values pN−1, . . . , p0, q0, . . . , qN−2 of the current row or column.

    ENCODER, A DECODER AND CORRESPONDING METHODS OF DEBLOCKING FILTER ADAPTATION
    204.
    发明申请
    ENCODER, A DECODER AND CORRESPONDING METHODS OF DEBLOCKING FILTER ADAPTATION 有权

    公开(公告)号：US20220014793A1

    公开(公告)日：2022-01-13

    申请号：US17383639

    申请日：2021-07-23

    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

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

    IPC: H04N19/86 ,  H04N19/117 ,  H04N19/61 ,  H04N19/176 ,  H04N19/503

    Abstract: A deblocking method, for deblocking a transform block boundary within a coding block in an image encoding and/or an image decoding is provided, wherein the coding block comprising transform blocks is coded in inter prediction mode and the transform blocks comprises a first transform block and a second transform block; wherein the method comprises: determining, when the boundary between the first transform block and the second transform block is a transform block boundary and at least one of the first transform block and the second transform block has one or more non-zero transform coefficients, a value of a BS parameter for the boundary between the first transform block and the second transform block to be a first value; and performing de-blocking filtering process to the boundary between the first transform block and the second transform block at least based on the value of the boundary strength parameter.

    In-loop deblocking filter apparatus and method for video coding
    206.
    发明授权
    In-loop deblocking filter apparatus and method for video coding 有权

    公开(公告)号：US11197031B2

    公开(公告)日：2021-12-07

    申请号：US17134442

    申请日：2020-12-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

    IPC: H04N11/02 ,  H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/14 ,  H04N19/176 ,  H04N19/86

    Abstract: An in-loop deblocking filter apparatus (120) for processing a current row or column of samples into a filtered row or column of samples. The current row or column of samples comprises a plurality of samples from a first sample block and a horizontally or vertically neighboring second sample block of a reconstructed picture of a video stream. The samples of the current row or column of samples have sample values pN−1−p0, q0−qN−1 wherein N is an even integer greater than 2. If a first condition or a second condition is satisfied, the current row or column is processed by: determining a filtered sample value q0′ by applying a (2N−1)-tap filter to the sample values pN−2, . . . , p0, q0, . . . , qN−1 of the current row or column; and/or determining a filtered sample value p0′ by applying a (2N−1)-tap filter to the sample values pN−1, . . . , p0, q0, . . . , qN−2 of the current row or column.

    Apparatus and method for de-blocking filtering
    207.
    发明授权
    Apparatus and method for de-blocking filtering 有权

    公开(公告)号：US11184643B2

    公开(公告)日：2021-11-23

    申请号：US16531898

    申请日：2019-08-05

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Zhijie Zhao

    IPC: H04N19/86 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

    Abstract: A system and method for processing a video stream are provided. When coding or decoding a video stream a de-blocking filtering may be applied for reducing discontinuities caused by use of a block-based video coding. The de-blocking filtering is performed using a filter grid. The size of the filter grid is chosen adaptively based on the processing parameters. The adaptive size of the filtering grid is determined based on the number of samples used and modified in de-blocking filtering of an edge of a coding block. The filtering grid may be used both for vertical and horizontal edge filtering.

    APPARATUS AND METHOD FOR PERFORMING DEBLOCKING
    208.
    发明申请
    APPARATUS AND METHOD FOR PERFORMING DEBLOCKING 有权

    公开(公告)号：US20210352284A1

    公开(公告)日：2021-11-11

    申请号：US17382550

    申请日：2021-07-22

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

    IPC: H04N19/117 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

    Abstract: Embodiments of the present disclosure relate to the field of picture processing. Especially, the embodiments are directed to improving the deblocking filter of an image coding device. During the deblocking, at most a number MA of sample values of the first coding block adjacent to the block edge are modified and at most a number MB of sample values of the second coding block adjacent to the block edge are modified; or at most a number MA of sample values of the second coding block adjacent to the block edge are modified and at most a number MB of sample values of the first coding block adjacent to the block edge are modified, MA≠MB.

    Memory access window and padding for motion vector refinement
    210.
    发明授权
    Memory access window and padding for motion vector refinement 有权

    公开(公告)号：US11122286B2

    公开(公告)日：2021-09-14

    申请号：US16844901

    申请日：2020-04-09

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Semih Esenlik ,  Zhijie Zhao ,  Han Gao ,  Anand Meher Kotra

    IPC: H04N19/513 ,  H04N19/57 ,  H04N19/573

    Abstract: The present disclosure relates to motion vector determination using template matching. In particular, an initial motion vector and a template are obtained for a prediction block. Then a refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector. The template matching accesses integer sample positions within a predetermined window, the predetermined window including said search space and further integer sample positions accessible for the template matching, replaces at least one integer sample position located out of the window by at least one replacement value, each replacement value is based on at least one sample within said window, and uses the accessed integer sample position values as well as the at least one replacement value to perform the template matching.

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