公开(公告)号：US11936861B2

公开(公告)日：2024-03-19

申请号：US17099470

申请日：2020-11-16

Applicant: Huawei Technologies Co., Ltd. ,  Tsinghua University

Inventor： Quanhe Yu ,  Jicheng An ,  Jianhua Zheng ,  Yongbing Lin ,  Liqiang Wang ,  Benben Niu ,  Ziwei Wei ,  Yun He

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/119 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

Abstract: Embodiments of this application relate to the video coding and compression field, and disclose an encoding method and apparatus, and a decoding method and apparatus, to resolve a problem that an existing split mode cannot satisfy a relatively complex texture requirement. The decoding method specifically includes: parsing a bitstream to determine a basic split mode for a current to-be-decoded picture block and a target derivation mode for a subpicture block of the current to-be-decoded picture block; splitting the current to-be-decoded picture block into N subpicture blocks in the basic split mode, where N is an integer greater than or equal to 2; deriving one derived picture block from at least two adjacent subpicture blocks in the N subpicture blocks in the target derivation mode; and decoding the derived picture block.

公开(公告)号：US11197018B2

公开(公告)日：2021-12-07

申请号：US16728264

申请日：2019-12-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng An ,  Yu Han ,  Jianhua Zheng

IPC: H04N19/52 ,  H04N19/58

Abstract: A method for predicting motion information of a picture block includes: obtaining motion information of at least one determined motion vector picture block in a picture in which a to-be-processed picture block is located, where the at least one determined motion vector picture block includes a determined motion vector picture block discontiguous to the to-be-processed picture block; obtaining first identification information, where the first identification information is used to determine target motion information from the motion information of the at least one determined motion vector picture block; and predicting motion information of the to-be-processed picture block based on the target motion information.

公开(公告)号：US20190230363A1

公开(公告)日：2019-07-25

申请号：US16371514

申请日：2019-04-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jicheng An ,  Xu Chen ,  Jianhua Zheng

IPC: H04N19/139 ,  H04N19/513 ,  H04N19/176 ,  H04N19/105

Abstract: A video decoding method includes obtaining an index of predicted motion information of a current image block in a candidate predicted motion information list, where the predicted motion information includes reference image information and a motion vector prediction value, and candidate predicted motion information in the candidate predicted motion information list is motion information of an adjacent block of the current image block in time domain or space domain, querying the candidate predicted motion information list based on the index, and using the found candidate predicted motion information as the predicted motion information, determining a correspondence between a motion vector difference and a motion vector prediction value based on the predicted motion information, and obtaining the motion vector difference from the bitstream, and adding the motion vector prediction value and the corresponding motion vector difference based on the correspondence to obtain a motion vector of the current image block.

公开(公告)号：US20250055978A1

公开(公告)日：2025-02-13

申请号：US18929661

申请日：2024-10-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Quanhe Yu ,  Jianhua Zheng

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30

Abstract: An inter prediction method is provided, including: obtaining a first reference frame index and a first motion vector of a to-be-processed block; deriving a second reference frame index from the first reference frame index, where the second reference frame index is different from the first reference frame index; scaling the first motion vector to obtain a second motion vector; obtaining a first reference block of the to-be-processed block according to the first reference frame index and the first motion vector; obtaining a second reference block of the to-be-processed block according to the second reference frame index and the second motion vector; and weighting the first reference block and the second reference block to obtain a combined prediction block. Each reference list for inter prediction is allowed to include two groups of motion information, which helps improve an inter prediction effect.

公开(公告)号：US20230276055A1

公开(公告)日：2023-08-31

申请号：US18154961

申请日：2023-01-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng An ,  Xu Chen ,  Jianhua Zheng

IPC: H04N19/139 ,  H04N19/463 ,  H04N19/52 ,  H04N19/577 ,  H04N19/573 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/139 ,  H04N19/463 ,  H04N19/52 ,  H04N19/577 ,  H04N19/573 ,  H04N19/105 ,  H04N19/176 ,  H04N19/521

Abstract: An inter prediction method includes obtaining predicted motion information of a current image block, where the predicted motion information is used to obtain one or more motion vectors of the current image block, and the motion vectors include a forward MV and a backward MV for a bidirectional inter prediction. The disclosed method further includes determining a motion vector difference for the current image block, and calculating the motion vectors based on the predicted motion information and the motion vector difference, where the motion vector difference is shared by the forward MV and the backward MV.

公开(公告)号：US11412210B2

公开(公告)日：2022-08-09

申请号：US17011163

申请日：2020-09-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Quanhe Yu ,  Jianhua Zheng

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30

Abstract: An inter prediction method is provided, including: obtaining a first reference frame index and a first motion vector of a to-be-processed block (101); deriving a second reference frame index from the first reference frame index, where the second reference frame index is different from the first reference frame index (102); scaling the first motion vector to obtain a second motion vector (103); obtaining a first reference block of the to-be-processed block according to the first reference frame index and the first motion vector (104); obtaining a second reference block of the to-be-processed block according to the second reference frame index and the second motion vector (105); and weighting the first reference block and the second reference block to obtain a combined prediction block (106). Each reference list for inter prediction is allowed to include two groups of motion information, which helps improve an inter prediction effect.

公开(公告)号：US20210014506A1

公开(公告)日：2021-01-14

申请号：US17035711

申请日：2020-09-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Jianhua Zheng

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176

Abstract: A method and an apparatus and for intra prediction of a picture block are provided, to provide a manner of predicting a current block by using spatial non-adjacent blocks or a temporal neighboring block, thereby improving coding performance. In various embodiments, a first luma intra mode set is constructed; and a bitstream is parsed to obtain a first identifier. In those embodiments, when the first identifier indicates that a luma prediction mode of the current block belongs to the first luma intra mode set, the bitstream is parsed to obtain a second identifier. The second identifier indicates that a candidate luma prediction mode in the first luma intra mode set is used as the luma prediction mode of the current block. Still in those embodiments, a luma prediction value of the current block is obtained based on the luma prediction mode of the current block.

公开(公告)号：US20200099948A1

公开(公告)日：2020-03-26

申请号：US16697854

申请日：2019-11-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yu Han ,  Jicheng An ,  Jianhua Zheng

IPC: H04N19/44 ,  H04N19/159 ,  H04N19/11 ,  H04N19/105 ,  H04N19/132

Abstract: A method for decoding an intra-frame prediction mode includes determining a first mode set comprising intra-frame prediction modes of available neighborhood reconstruction units in preset positions of the current to-be-decoded unit and at least one non-directional prediction mode, and parsing the bitstream to obtain a second identifier used to indicate a candidate intra-frame prediction mode in the first mode set that is used as the intra-frame prediction mode of the current to-be-decoded unit, and a codeword length of the second identifier indicating one of the at least one non-directional prediction mode as the intra-frame prediction mode of the current to-be-decoded unit is not less than a codeword length of any second identifier indicating an intra-frame prediction mode of an available neighborhood reconstruction unit in a preset position of the current to-be-decoded unit as the intra-frame prediction mode of the current to-be-decoded unit.

公开(公告)号：US20190313092A1

公开(公告)日：2019-10-10

申请号：US16448358

申请日：2019-06-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yu Han ,  Jicheng An ,  Jianhua Zheng

IPC: H04N19/109 ,  H04N19/503 ,  H04N19/61 ,  H04N19/186 ,  H04N19/169 ,  G06F17/16

Abstract: A chrominance prediction method includes determining a target luminance prediction mode of the luminance processing unit from preset candidate luminance prediction modes, where a difference between a predicted luminance value of the luminance processing unit corresponding to any target luminance prediction mode and a reconstructed luminance value of the luminance processing unit is less than or equal to a difference between a predicted luminance value of the luminance processing unit corresponding to each candidate luminance prediction mode excluding the target luminance prediction mode and the reconstructed luminance value of the luminance processing unit, and obtaining a predicted chrominance value of the to-be-processed chrominance unit, where a candidate chrominance prediction mode set of the to-be-processed chrominance unit includes the target luminance prediction mode.

公开(公告)号：US12278981B2

公开(公告)日：2025-04-15

申请号：US18358700

申请日：2023-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xu Chen ,  Jicheng An ,  Jianhua Zheng

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

Abstract: Embodiments of this application disclose a method for obtaining a motion vector, including: determining a reference block of a to-be-processed block, wherein the reference block and the to-be-processed block have a preset spatial correlation, the reference block is obtained based on a prediction block of the reference block determined by a refined initial motion vector, the refined initial motion vector is obtained based on an initial motion vector and one or more preset motion vector offsets, and the initial motion vector is obtained based on a predicted motion vector of the reference block; and using the initial motion vector as a predicted motion vector of the to-be-processed block.