公开(公告)号：US20230049334A1

公开(公告)日：2023-02-16

申请号：US17971086

申请日：2022-10-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N5/235 ,  G06T5/00 ,  H04N19/154 ,  G06V10/60

Abstract: This application provides a high dynamic range HDR video processing method, an encoding device, and a decoding device. The method includes: obtaining dynamic metadata of an Nth HDR video frame according to a dynamic metadata generation algorithm; calculating a tone-mapping (tone-mapping) curve parameter of the Nth HDR video frame based on the dynamic metadata of the Nth HDR video frame; generating a tone-mapping curve based on the curve parameter; determining, according to a quality assessment algorithm, distortion D′ caused by the tone-mapping curve; comparing D′ and DT, to determine a mode used by the Nth HDR video frame, where the mode is an automatic mode or a director mode, and DT is a threshold value; and determining metadata of the Nth HDR video frame based on the determined mode used by the Nth HDR video frame.

公开(公告)号：US11290724B2

公开(公告)日：2022-03-29

申请号：US16894268

申请日：2020-06-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shan Gao ,  Weiwei Xu ,  Huanbang Chen ,  Haitao Yang

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/56 ,  H04N19/573

Abstract: An inter prediction method includes parsing, by a processor, a bitstream to obtain a location of a target adjacent image block of a current image block. The method further includes obtaining a preset correspondence between an adjacent image block location and a motion vector precision, wherein in the preset correspondence, locations of at least two adjacent image blocks correspond to different motion vector precisions. The method further includes determining, based on the location of the target adjacent image block and the preset correspondence, a target motion vector precision corresponding to the target adjacent image block. The method further includes determining a motion vector predictor of the current image block based on the location of the target adjacent image block and the target motion vector precision.

公开(公告)号：US20240397070A1

公开(公告)日：2024-11-28

申请号：US18793919

申请日：2024-08-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/30 ,  G06T3/40 ,  H04N9/64 ,  H04N19/136 ,  H04N19/182 ,  H04N19/70

Abstract: The present disclosure discloses an image processing method, apparatus, and a storage medium. The method includes: parsing an original bitstream of a to-be-processed image to obtain the to-be-processed image; parsing a first layered bitstream of the to-be-processed image to obtain a first layered image of the to-be-processed image; determining a second layered image of the to-be-processed image based on the to-be-processed image and the first layered image, where one of the first layered image and the second layered image is a base layer image, and the other of the first layered image and the second layered image is a detail layer image; performing tone mapping on the base layer image to obtain a mapping result of the base layer image; and fusing the mapping result of the base layer image and the detail layer image.

公开(公告)号：US20210250581A1

公开(公告)日：2021-08-12

申请号：US17240508

申请日：2021-04-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiwei Xu ,  Haitao Yang ,  Yin Zhao

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

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.

公开(公告)号：US12284350B2

公开(公告)日：2025-04-22

申请号：US17721561

申请日：2022-04-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiwei Xu ,  Quanhe Yu ,  Hu Chen ,  Elena Alexandrovna Alshina ,  Rafal Mantiuk

IPC: H04N19/126 ,  H04N19/136 ,  H04N19/172 ,  H04N19/186 ,  H04N19/189

Abstract: Embodiments of this application provide a method for processing image signal conversion, including: obtaining a primary color component of a to-be-processed pixel; and converting a first value of the primary color component into a second value based on a preset dynamic range conversion model, where the dynamic range conversion model is: L ′ = F ⁡ ( L ) = a × ( p × L n ( k 1 × p - k 2 ) × L n + k 3 ) m + b , where L is the first value, L′ is the second value, and k1, k2, k3, a, b, m, n, and p are model parameters.

公开(公告)号：US20250045871A1

公开(公告)日：2025-02-06

申请号：US18713237

申请日：2022-11-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiangyu Hu ,  Weiwei Xu ,  Jinsong Wen ,  Yanbing Jia ,  Jiantong Zhou ,  Qiyan Zhai ,  Yihua Zeng ,  Quanhe Yu ,  Zizhong Wang ,  Yichuan Wang ,  Hu Chen ,  Jinqin Ai ,  Yutong Hu

IPC: G06T5/20 ,  G06F3/04845 ,  G06F3/04883

Abstract: This application provides a picture processing method. The method includes: The encoder side obtains a to-be-processed picture, obtains a plurality of groups of visual sensory experience parameters, and encodes the to-be-processed picture and the plurality of groups of visual sensory experience parameters. At a decoder side, the method includes: The decoder side obtains a to-be-processed picture, obtains a zoom-in operation instruction, obtains one or more groups of visual sensory experience parameters corresponding to one or more local pictures, and separately processes the corresponding local picture based on the one or more groups of visual sensory experience parameters to obtain a processed local picture.

公开(公告)号：US20250024018A1

公开(公告)日：2025-01-16

申请号：US18885854

申请日：2024-09-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

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

Abstract: Technologies for inter prediction for a block in a video are provided. In one example, a method includes: when a size of a current block satisfies a preset condition, parsing a bitstream to obtain a syntax element, where the syntax element includes at least an index of optimal candidate motion information of the 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.

公开(公告)号：US12200224B2

公开(公告)日：2025-01-14

申请号：US18150742

申请日：2023-01-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiwei Xu ,  Haitao Yang ,  Yin Zhao

IPC: 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.

公开(公告)号：US12113959B2

公开(公告)日：2024-10-08

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 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

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.

公开(公告)号：US20230057829A1

公开(公告)日：2023-02-23

申请号：US17982221

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 ,  G06T5/40

Abstract: The present disclosure relates generally to the field of video processing, and more particularly to high dynamic range (HDR) video and image processing. In particular, the present disclosure relates to determining one or more curve parameters of a tone mapping curve. For example, a device (encoder or decoder) may obtain a high dynamic range (HDR) video frame and metadata associated to the HDR video frame. The device further obtains a pair of anchor points, based on the HDR video frame and the metadata. The pair of anchor points comprises a first anchor point and a second anchor point of the tone mapping curve. Moreover, the device generates the one or more curve parameters of the tone mapping curve based on the pair of anchor points.