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    Picture prediction method and apparatus
    1.
    发明授权
    Picture prediction method and apparatus 有权

    公开(公告)号：US12231628B2

    公开(公告)日：2025-02-18

    申请号：US18168799

    申请日：2023-02-14

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Weiwei Xu ,  Haitao Yang ,  Yin Zhao

    IPC: H04N19/11 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/70

    Abstract: A picture prediction method includes receiving a bitstream; parsing the bitstream to obtain a prediction mode of a current block; when the prediction mode of the current block is a combined intra and inter prediction mode, selecting an execution manner of a triangular prediction unit mode according to a preset policy; determining motion information of the current block according to the execution manner of the triangular prediction unit mode; performing a motion compensation process based on the motion information, to obtain an inter prediction sample; obtaining an intra prediction sample according to the prediction mode of the current block; and combining the inter prediction sample and the intra prediction sample to obtain a prediction picture of the current block.

    TONE MAPPING METHOD AND APPARATUS
    4.
    发明公开
    TONE MAPPING METHOD AND APPARATUS 审中-公开

    公开(公告)号：US20230325987A1

    公开(公告)日：2023-10-12

    申请号：US18336837

    申请日：2023-06-16

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Yichuan Wang ,  Quanhe Yu ,  Weiwei Xu ,  Hu Chen

    IPC: G06T5/00 ,  G06T7/90

    CPC classification number: G06T5/009 ,  G06T7/90 ,  G06T2207/20208 ,  G06T2207/10024

    Abstract: Tone mapping methods and apparatus provide for receipt by a backend device may of metadata and an HDR image from a frontend device and the generation of a mapping curve based on feature parameters of the mapping curve included in the metadata. Tone mapping on the HDR image can be performed based on the mapping curve. The feature parameters of the mapping curve are determined by the frontend device based on a luminance distribution status of the HDR image. In this way, the mapping curve parameters are determined based on the luminance distribution status of the HDR image so that design of the mapping curve is more flexible, and display effect of the HDR image can be effectively improved.

    Inter prediction method and apparatus
    6.
    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.

    DETERMINATION OF A PARAMETER SET FOR A TONE MAPPING CURVE
    7.
    发明申请
    DETERMINATION OF A PARAMETER SET FOR A TONE MAPPING CURVE 有权

    公开(公告)号：US20230054477A1

    公开(公告)日：2023-02-23

    申请号：US17982046

    申请日：2022-11-07

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Hu Chen ,  Yichuan Wang ,  Weiwei Xu ,  Quanhe Yu ,  Elena Alexandrovna Alshina

    IPC: G06T5/00 ,  G06T5/10

    Abstract: The present disclosure relates generally to the field of video processing, and more particularly, to high dynamic range (HDR) image processing. In particular, the present disclosure relates to a method for determining a parameter set for a tone mapping curve. The method comprises obtaining a plurality of parameter sets, wherein each parameter set defines the tone mapping curve, and wherein each parameter set is derived based on one of a plurality of HDR video frames. Further, the method comprises temporally filtering the plurality of parameter sets to obtain a temporally filtered parameter set.

    MOTION VECTOR PREDICTION FOR VIDEO CODING
    8.
    发明申请
    MOTION VECTOR PREDICTION FOR VIDEO CODING 有权

    公开(公告)号：US20210168355A1

    公开(公告)日：2021-06-03

    申请号：US17139837

    申请日：2020-12-31

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Weiwei Xu ,  Ting Fu ,  Jiali Fu

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/132 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

    Abstract: Technologies for inter prediction for a block in a video are provided. In one example, a method includes: parsing a bitstream to obtain a syntax element, where the syntax element includes at least an index of optimal candidate motion information of a current block; determining, based on the syntax element, to construct a first list or a second list for the current block, where the first list is a block-based candidate motion information list, and the second list is a subblock-based candidate motion information list; determining optimal motion information from the first list or the second list based on the index; and predicting the current block based on the optimal motion information. In this method, the block-based candidate motion information list and the subblock-based candidate motion information list are distinguished from each other. This effectively reduces transmission costs of the optimal candidate motion information.

    IMAGE CAPTURE METHOD, IMAGE DISPLAY METHOD, AND APPARATUS
    9.
    发明公开
    IMAGE CAPTURE METHOD, IMAGE DISPLAY METHOD, AND APPARATUS 审中-公开

    公开(公告)号：US20240323544A1

    公开(公告)日：2024-09-26

    申请号：US18731364

    申请日：2024-06-03

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Jinsong Wen ,  Shuncai Zhong ,  Weiwei Xu ,  Qiyan Zhai ,  Wenhong Gong

    IPC: H04N23/76 ,  G09G5/10 ,  H04N23/71

    CPC classification number: H04N23/76 ,  G09G5/10 ,  H04N23/71 ,  G09G2320/0233

    Abstract: An image capture method, an image display method, and an apparatus are provided to reduce a difference between an image displayed on a display end and an image displayed on a capture end. During encoding, the capture end transmits data for describing a luminance mapping relationship between a before-compression image and an after-compression image to the display end, so that consistency between the image on the capture end and the image on the display end is ensured as much as possible. In addition, screen related information for describing luminance of the capture end is transmitted to the display end, so that the display end adjusts backlight and a pixel value based on the screen related information, to improve consistency between the image on the capture end and the image on the display end.

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