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    Limited memory access window for motion vector refinement
    195.
    发明授权
    Limited memory access window for motion vector refinement 有权

    公开(公告)号：US11582477B2

    公开(公告)日：2023-02-14

    申请号：US17849405

    申请日：2022-06-24

    Applicant: Huawei Technologies Co., Ltd.

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

    IPC: H04N19/513 ,  H04N19/57

    Abstract: The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the 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 and includes one or more fractional sample positions, wherein each of fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.

    Coding method, device, system
    196.
    发明授权
    Coding method, device, system 有权

    公开(公告)号：US11539962B2

    公开(公告)日：2022-12-27

    申请号：US17205340

    申请日：2021-03-18

    Applicant: Huawei Technologies Co., Ltd.

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

    IPC: H04N19/157 ,  H04N19/176 ,  H04N19/184 ,  H04N19/70 ,  H04N19/96

    Abstract: A decoding method for decoding an encoded picture which is partitioned into coding tree blocks which are further partitioned into coding blocks with different sizes, comprises parsing a first indication from the sequence parameter set (SPS)/picture parameter set (PPS)/slice header/tile header of a bit stream containing the encoded picture, determining the partition mode of the coding tree blocks, which are confined by block size restriction parameter and partition depth restriction parameter included in the SPS/PPS/slice header/tile header when the first indication is first value, or determining the partition mode of the multiple coding tree blocks, which are confined by default by block size restriction parameter and default partition depth restriction parameter when the first indication is second value or not presented in the SPS/PPS/slice header/tile header, and partitioning the coding tree blocks into the coding blocks according to the partition mode, and decoding the coding blocks.

    Apparatus and method for boundary partition
    197.
    发明授权
    Apparatus and method for boundary partition 有权

    公开(公告)号：US11539953B2

    公开(公告)日：2022-12-27

    申请号：US17188940

    申请日：2021-03-01

    Applicant: Huawei Technologies Co., Ltd.

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

    IPC: H04N19/122 ,  H04N19/119 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60

    Abstract: A method for boundary partition of a current block is provided. The method includes obtaining a partition indicator from a received bitstream; determining whether the partition indicator indicates that the current block is to be split and whether the current block is a boundary block; and performing a non-inverse transform operation on an inside part of the current block when the partition indicator indicates that the current block is not to be split and the current block is a boundary block, wherein the inside part of the block is located within the picture. For the boundary block which is determined not to be split, a non-inverse transform operation is chosen. This avoids a normal inverse transform on the residuals of the inside part (within the picture) of the current block in the decoder, so number of blocks for the inverse transformation is decreased, and decoding complexity is thus reduced.

    Picture encoder, picture decoder and corresponding methods of encoding and decoding
    198.
    发明授权
    Picture encoder, picture decoder and corresponding methods of encoding and decoding 有权

    公开(公告)号：US11368696B2

    公开(公告)日：2022-06-21

    申请号：US17142957

    申请日：2021-01-06

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Semih Esenlik ,  Ivan Krasnov

    IPC: H04N11/02 ,  H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/46 ,  H04N19/82

    Abstract: The present disclosure relates to adaptive filtering, e.g. adaptive loop filtering, which may be used during encoding and decoding of video pictures. In particular, the present disclosure provides for determining a zero coefficients map, in which each bit indicates whether or not a respective filter coefficient of a supporting region is to be included into the bitstream for an adaptive filter. An indication of the zero coefficients map is included into the bitstream before at least one filter coefficient of the adaptive filter indicated by the zero coefficients map as to be included into the bitstream. The provision of a zero coefficients map enables an efficient signaling and allows for flexible filter shapes that are particularly suitable for the content at hand.

    Coding method, device, system with merge mode
    199.
    发明授权
    Coding method, device, system with merge mode 有权

    公开(公告)号：US11343533B2

    公开(公告)日：2022-05-24

    申请号：US17190025

    申请日：2021-03-02

    Applicant: Huawei Technologies Co., Ltd.

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

    IPC: H04N19/56 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/96

    Abstract: An apparatus and method for marking availability of a candidate coding block for merge estimation of a current coding block within a coding tree unit (CTU). The candidate block may be marked as unavailable if a splitting depth of the current coding block is equal to or larger than a predetermined threshold and a first location of the candidate block and a second location of the current block are included in a same merge estimation region (MER). Otherwise, the candidate block is marked as available. A candidate block may be marked as unavailable also, when a parent block “parentCurr” of the current block and a parent block “parentCand” of the candidate block, with both parent blocks obtained by splitting, are the same block and when the size of the parentCand is smaller than a threshold.

    Performing chroma deblocking for blocks which use joint chroma coding
    200.
    发明授权
    Performing chroma deblocking for blocks which use joint chroma coding 有权

    公开(公告)号：US11317091B2

    公开(公告)日：2022-04-26

    申请号：US17319098

    申请日：2021-05-13

    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

    Inventor： Anand Meher Kotra ,  Elena Alexandrovna Alshina ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Roman Igorevich Chernyak

    IPC: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117

    Abstract: A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.

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