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    Method of efficient signalling of CBF flags
    31.
    发明授权
    Method of efficient signalling of CBF flags 有权

    公开(公告)号：US11716479B2

    公开(公告)日：2023-08-01

    申请号：US17830875

    申请日：2022-06-02

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Roman Igorevich Chernyak ,  Yin Zhao ,  Sergey Yurievich Ikonin ,  Jianle Chen

    IPC: H04N11/02 ,  H04N19/186 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60 ,  H04N19/70

    CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60 ,  H04N19/70

    Abstract: A method comprising obtaining a bitstream, the bitstream comprises a transform unit syntax and a coding unit syntax, the transform unit syntax includes a value of a first flag and a value of a second flag related to, respectively, a first chroma transform block and a second chroma transform block of a current transform unit or a current sub-transform unit within the current transform unit, the first or second flag specifies whether the first or second chroma transform block contains at least one transform coefficient levels not equal to 0, the coding unit syntax includes a value of a third flag specifying whether a transform tree structure is present or not; and deriving a value of a fourth flag based on the values of the first, second, and third flags, the fourth flag specifies whether a luma transform block contains at least one transform coefficient levels not equal to 0.

    Constrained Coding Tree for Video Coding
    32.
    发明公开
    Constrained Coding Tree for Video Coding 审中-公开

    公开(公告)号：US20230239518A1

    公开(公告)日：2023-07-27

    申请号：US18194459

    申请日：2023-03-31

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jianle Chen ,  Yin Zhao ,  Haitao Yang

    IPC: H04N19/96 ,  H04N19/169

    CPC classification number: H04N19/96 ,  H04N19/1883

    Abstract: A video coding mechanism is disclosed. The mechanism includes partitioning an image to create at least one coding tree unit (CTU) with at least one coding tree node. The mechanism further includes determining that the coding tree node height is twice a maximum transform unit (TU) height and the coding tree node width is twice a maximum TU width. The mechanism further includes selecting a split mode for the coding tree node based on the determination. The split mode is selected from a quad-tree split, a horizontal binary-tree split, and no split. The mechanism further includes applying the split mode to the coding tree node to create one or more coding units (CUs). The mechanism further includes encoding the CUs into a bitstream. The mechanism further includes transmitting the bitstream toward a decoder.

    Inter prediction method and apparatus
    35.
    发明授权
    Inter prediction method and apparatus 有权

    公开(公告)号：US11647207B2

    公开(公告)日：2023-05-09

    申请号：US17249189

    申请日：2021-02-23

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Weiwei Xu ,  Haitao Yang ,  Yin Zhao

    IPC: H04N19/159 ,  H04N19/176 ,  H04N19/184

    CPC classification number: H04N19/159 ,  H04N19/176 ,  H04N19/184

    Abstract: Inter prediction method and apparatus are disclosed to resolve problems in the conventional technology that prediction samples obtained in an inter prediction mode are spatially discontinuous, prediction efficiency is affected, and prediction residual energy is relatively high. The method includes: parsing a bitstream to obtain motion information of a to-be-processed picture block; performing motion compensation on the to-be-processed picture block based on the obtained motion information, to obtain a prediction block of the to-be-processed picture block, where the prediction block of the to-be-processed picture block includes a prediction value of a target sample; and performing weighting calculation on one or more reconstructed values of one or more reference samples and the prediction value of the target sample, to update the prediction value of the target sample, where the reference sample(s) have a preset spatial position relationship with the target sample.

    Motion vector obtaining method and apparatus
    37.
    发明授权
    Motion vector obtaining method and apparatus 有权

    公开(公告)号：US11463721B2

    公开(公告)日：2022-10-04

    申请号：US17111376

    申请日：2020-12-03

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Huanbang Chen ,  Yin Zhao ,  Haitao Yang ,  Jianle Chen

    IPC: H04N19/513 ,  H04N19/176 ,  H04N19/189 ,  H04N19/567

    Abstract: This application provides a motion vector obtaining method and apparatus. The method includes: determining a target offset vector of a block and identifier information of a target picture, wherein the block comprises at least one sub-block; determining a location of the sub-block; determining, as a target location coordinate value of a collocated sub-block, a location coordinate value obtained by performing a clipping operation on an initial location coordinate value in a range, wherein the initial location coordinate value is based on the location of the sub-block and the target offset vector; and obtaining a motion vector of the sub-block based on a motion vector corresponding to the target location coordinate value. Thus, a range of the target offset vector is limited, so that a quantity of memory read times can be reduced in a process of obtaining the motion vector of the collocated sub-block.

    Coding method and apparatus
    38.
    发明授权
    Coding method and apparatus 有权

    公开(公告)号：US11343523B2

    公开(公告)日：2022-05-24

    申请号：US16849354

    申请日：2020-04-15

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

    IPC: H04N19/44 ,  H04N19/12 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/124 ,  H04N19/184 ,  H04N19/51

    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.

    Video encoder, video decoder, and corresponding encoding and decoding methods
    39.
    发明授权
    Video encoder, video decoder, and corresponding encoding and decoding methods 有权

    公开(公告)号：US11336907B2

    公开(公告)日：2022-05-17

    申请号：US17149726

    申请日：2021-01-15

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Xiang Ma ,  Yin Zhao ,  Haitao Yang ,  Jianle Chen

    IPC: H04N19/176 ,  H04N19/186

    Abstract: Techniques are described of a linear model prediction mode. A set of reconstructed neighboring luma samples are determined. Two pairs of luma value and chroma value are determined according to N reconstructed neighboring luma samples, N reconstructed neighboring chroma samples, M reconstructed neighboring luma samples, and M reconstructed neighboring chroma samples. The minimum value of the N reconstructed neighboring luma samples is not less than the maximum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. The maximum value of the M reconstructed neighboring luma samples is not larger than the minimum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. M>1 and N>1. Linear model parameters are determined based on the two pairs of luma value and chroma value, and a predictive block is determined based on the linear model parameters.

    Picture partitioning method and apparatus
    40.
    发明授权
    Picture partitioning method and apparatus 有权

    公开(公告)号：US11323708B2

    公开(公告)日：2022-05-03

    申请号：US17187184

    申请日：2021-02-26

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen ,  Lian Zhang

    IPC: H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

    Abstract: A picture partitioning method and apparatus are described. The method includes determining a split mode of a current node, where the current node includes a luma block and a chroma block. The method further includes determining, based on the split mode of the current node and a size of the current node, that the chroma block of the current node is not further split. In accordance with the chroma block of the current node not being further split, the method includes splitting the luma block of the current node based on the split mode of the current node. In accordance with the chroma block of the current node not being further split, the method may be used to split only the luma block of the current node, thereby improving encoding and decoding efficiency, reducing a maximum throughput of a codec, and facilitating implementation of the codec.

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