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    Spatially varying transform with adaptive transform type
    153.
    发明授权
    Spatially varying transform with adaptive transform type 有权

    公开(公告)号：US11601663B2

    公开(公告)日：2023-03-07

    申请号：US17561049

    申请日：2021-12-23

    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 includes 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.

    Chroma block prediction method and apparatus
    154.
    发明授权
    Chroma block prediction method and apparatus 有权

    公开(公告)号：US11595669B2

    公开(公告)日：2023-02-28

    申请号：US17303976

    申请日：2021-06-11

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Xiang Ma ,  Jianle Chen ,  Haitao Yang

    IPC: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

    Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma block.

    Intra-Prediction Using a Cross-Component Linear Model in Video Coding
    155.
    发明申请
    Intra-Prediction Using a Cross-Component Linear Model in Video Coding 有权

    公开(公告)号：US20230057680A1

    公开(公告)日：2023-02-23

    申请号：US17979532

    申请日：2022-11-02

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiang Ma ,  Jianle Chen ,  Haitao Yang

    IPC: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

    Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a video signal partitioned into a chroma block and a first neighboring luma block. The mechanism also includes encoding prediction information for chroma samples of the chroma block into a bitstream. The prediction information for the chroma samples is determined via intra-prediction based on down-sampled neighboring luma samples. The down-sampled neighboring luma samples are generated from a single row of luma samples from the first neighboring luma block. A bitstream including the prediction information for the chroma samples is transmitted to support decoding and display of the chroma samples.

    Motion vector prediction method based on affine motion model and device
    156.
    发明授权
    Motion vector prediction method based on affine motion model and device 有权

    公开(公告)号：US11539975B2

    公开(公告)日：2022-12-27

    申请号：US17196642

    申请日：2021-03-09

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Huanbang Chen ,  Haitao Yang

    IPC: H04N19/513 ,  H04N19/176 ,  H04N19/105 ,  H04N19/149

    Abstract: A motion vector prediction method based on an affine motion model and a device are provided. The method includes: obtaining one spatial reference block of a to-be-processed picture block; determining a plurality of preset subblock locations of the spatial reference block; obtaining motion vectors corresponding to preset pixel locations of the to-be-processed picture block that are extrapolated from motion vectors corresponding to the preset subblock locations; and obtaining motion vectors corresponding to a plurality of subblock locations of the to-be-processed picture block that are interpolated from the motion vectors corresponding to the preset pixel locations. According to this application, prediction accuracy in coding can be improved, and coding efficiency can be improved.

    Picture prediction method and apparatus, and codec
    157.
    发明授权
    Picture prediction method and apparatus, and codec 有权

    公开(公告)号：US11528503B2

    公开(公告)日：2022-12-13

    申请号：US16915678

    申请日：2020-06-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Xiang Ma ,  Haitao Yang ,  Huanbang Chen ,  Shan Gao

    IPC: H04N19/52 ,  H04N19/176 ,  H04N19/182

    Abstract: A picture prediction method is provided, which includes: obtaining initial motion information of a current picture block; determining, based on a matching cost criterion, that positions of a pair of reference blocks are a position of a target forward reference block of the current picture block and a position of a target backward reference block of the current picture block, where positions of each pair of reference blocks include a position of a forward reference block and a position of a backward reference block; and for the positions of each pair of reference blocks, a first position offset and a second position offset are in a mirror relationship; and obtaining a predicted value of a pixel value of the current picture block based on a pixel value of the target forward reference block and a pixel value of the target backward reference block.

    Intra-Frame Prediction and Decoding Methods and Apparatuses for Image Signal
    158.
    发明申请
    Intra-Frame Prediction and Decoding Methods and Apparatuses for Image Signal 有权

    公开(公告)号：US20220385920A1

    公开(公告)日：2022-12-01

    申请号：US17837574

    申请日：2022-06-10

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xingyu Zhang ,  Oscar Au ,  Haitao Yang ,  Jiantong Zhou

    IPC: H04N19/159 ,  H04N19/14 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/59 ,  H04N19/593

    Abstract: An intra-frame decoding method includes obtaining, from a video code stream, prediction mode information of a first signal component of a current block, determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode; obtaining a predicted value of a first signal component sampling point of the current block, and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

    VIDEO ENCODER, VIDEO DECODER, AND CORRESPONDING ENCODING AND DECODING METHODS
    159.
    发明申请
    VIDEO ENCODER, VIDEO DECODER, AND CORRESPONDING ENCODING AND DECODING METHODS 有权

    公开(公告)号：US20220264123A1

    公开(公告)日：2022-08-18

    申请号：US17729176

    申请日：2022-04-26

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

    IPC: H04N19/186 ,  H04N19/176

    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 ENCODING/DECODING METHOD AND RELATED APPARATUS
    160.
    发明申请
    PICTURE ENCODING/DECODING METHOD AND RELATED APPARATUS 有权

    公开(公告)号：US20220191476A1

    公开(公告)日：2022-06-16

    申请号：US17689724

    申请日：2022-03-08

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Lu Yu ,  Xuguang Zuo ,  Yin Zhao ,  Haitao Yang

    IPC: H04N19/105 ,  H04N19/503 ,  H04N19/142 ,  H04N19/172 ,  H04N19/58 ,  H04N19/159 ,  H04N19/184

    Abstract: A picture encoding/decoding method and a related apparatus are provided. The picture decoding method includes obtaining a current picture from a video, the current picture being segmented using random access points into multiple video segments supporting a random access function; selecting, from a knowledge base, K reference pictures of the current picture, wherein at least one reference picture in the knowledge base does not belong to a random access segment in which the current picture is located, the random access segment comprising a picture sequence arranged in a decoding order from a closest random access point before the current picture to a closest random access point after the current picture; and decoding the current picture according to the K reference pictures.

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