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    Method and Apparatus for Image Coding and Decoding Through Inter-Prediction
    31.
    发明申请
    Method and Apparatus for Image Coding and Decoding Through Inter-Prediction 审中-公开

    公开(公告)号：US20190230362A1

    公开(公告)日：2019-07-25

    申请号：US16371499

    申请日：2019-04-01

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xu Chen ,  Jicheng An ,  Jianhua Zheng

    IPC: H04N19/139 ,  H04N19/577 ,  H04N19/176 ,  H04N19/105 ,  H04N19/523

    Abstract: A decoding method includes determining prediction motion information of a first decoding block, performing bidirectional prediction on the first decoding block based on the prediction motion information to obtain a first decoding prediction block, performing motion search of first precision on a prediction reference image block to obtain at least one second decoding prediction block, where a search location of the motion search is determined using a motion vector predictor and the first precision, calculating a difference between the first decoding prediction block and each second decoding prediction block to obtain a target motion vector predictor of the first decoding block, and updating the target motion vector predictor through motion search.

    Loop filtering method and apparatus
    33.
    发明授权
    Loop filtering method and apparatus 有权

    公开(公告)号：US12052443B2

    公开(公告)日：2024-07-30

    申请号：US18063955

    申请日：2022-12-09

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Xu Chen ,  Haitao Yang

    IPC: H04N19/82 ,  H04N19/176 ,  H04N19/186 ,  H04N19/88

    CPC classification number: H04N19/82 ,  H04N19/176 ,  H04N19/186 ,  H04N19/88

    Abstract: A loop filtering method and apparatus are provided. The method includes: obtaining a first pixel matrix, where a value of a pixel at a corresponding location in the first pixel matrix corresponds to a luminance value of a pixel at a corresponding location in a first picture block; obtaining a second pixel matrix, where a pixel at a corresponding location in the second pixel matrix corresponds to a quantization step value corresponding to the luminance value of the pixel at the corresponding location in the first picture block; performing filtering processing on an input pixel matrix by using a filtering network to obtain an output pixel matrix, where the filtering network is a neural network that has a filtering function and is obtained through training, the output pixel matrix includes a third pixel matrix. Thus, filtering effect can be improved for reconstructed pictures of various quality levels.

    Inter prediction method and apparatus, and corresponding encoder and decoder
    35.
    发明授权
    Inter prediction method and apparatus, and corresponding encoder and decoder 有权

    公开(公告)号：US11956444B2

    公开(公告)日：2024-04-09

    申请号：US17360786

    申请日：2021-06-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xu Chen ,  Jianhua Zheng

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

    CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

    Abstract: An inter prediction method and apparatus, and a corresponding encoder and decoder are disclosed. The method includes: obtaining an index value of a length of a motion vector difference of the current picture block; determining target length information from a set of candidate length information based on the index value of the length; obtaining the motion vector difference of the current picture block based on the target length information; determining the motion vector target value of the current picture block based on the motion vector difference of the current picture block and the motion vector predictor of the current picture block; and obtaining a prediction block of the current picture block based on the motion vector target value of the current picture block.

    Picture encoding and decoding method and apparatus for video sequence
    37.
    发明授权
    Picture encoding and decoding method and apparatus for video sequence 有权

    公开(公告)号：US11818379B2

    公开(公告)日：2023-11-14

    申请号：US17964166

    申请日：2022-10-12

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xu Chen ,  Jianhua Zheng

    IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

    CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

    Abstract: A picture decoding method includes determining motion information of a to-be-decoded block; obtaining a first decoding prediction block of the to-be-decoded block based on the motion information; performing motion search with first precision in the prediction reference picture block to obtain at least two second decoding prediction blocks; performing downsampling on the first decoding prediction block and the at least two second decoding prediction blocks to obtain a first sampling pixel array and at least two second sampling pixel arrays, respectively; calculating a difference between the first sampling pixel array and each of the second sampling pixel arrays, and using, as a target prediction motion vector, a motion vector corresponding to a second sampling pixel array with a minimum difference; and obtaining a target decoding prediction block of the to-be-decoded block based on the target prediction motion vector, and decoding the to-be-decoded block based on the target decoding prediction block.

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