Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Tsinghua University

Santa Clara University

Shenzhen Greatro Electronic Technology Co., Ltd.

Other

University of California

Biosteed Gene Expression Tech. Co., Ltd.

Jianhua Zheng

Yun He

Nam Ling

Xiaozhen Zheng

Xu Chen

Chen-Xiong Zhang

Jicheng An

Zhouye Gu

Lingzhi Liu

Guichun Li

Jianwen Chen

Xiaozhong Xu

Meng Li

Hai Chen

Na Zhang

Quanhe Yu

Zhen Mao

Changcai Lai

Xinjian Meng

Yunfei Wang

Yongbing Lin

Yuan Yuan

Liqiang Wang

Minqiang Jiang

Xiaoran Cao

Huanbang Chen

Wei Yu

Ping Chen

Xiang Li

Fan Liang

Jingsheng Jason Cong

Xiaoqiang Cao

Ziyuan Wang

Guohui Li

Leming Yang

Philipp Zhang

Ping Yang

Li Song

Yu Han

Cheng-Xiong Zhang

Ce Zhu

Shujuan Shi

Li Sun

Daiping Tang

Chaohui An

Madhusudan Kalluri

Gang Zhu

Mingjun Fan

Benben Niu

Ziwei Wei

Taru Kanchan

Chenxiong Zhang

Shiyuan Wang

Huili Cai

Meihua Yang

Yan He

Hongyuan Deng

Liping Zhong

Shuying Huang

Zhongmou Wu

Shichang Song

Faisal Al-Jabri

Min Mao

A method and device for coding and decoding are disclosed. The method includes: dividing a picture to be encoded into several slices, each containing macroblocks continuous in a designated scanning sequence in the picture; dividing slices in the picture into one or more slice sets according to attribute information of the slices, each slice set containing one or more slices; and encoding the slices in the slice sets according to slice and slice set division information to get a coded bit stream of the picture. The decoding method includes: obtaining slice and slice set division information from a bit stream to be decoded and decoding the bit stream according to the obtained slice and slice set division information. The invention improves the performance of video transmission effectively and realizes region based coding. The implementation of coding and decoding is simple and the complexity of coding and decoding systems is reduced.

Method and device for video coding and decoding

This application provides a video picture decoding and encoding method and a video picture decoding and encoding apparatus. When it is determined that a merge or skip mode is used, if it is determined through decoding that a merge mode with motion vector difference (MMVD) indicator is true, a triangle prediction unit (PU) indicator may not be coded. The triangle PU indicator is coded when it is determined through decoding that the MMVD indicator is false. This reduces a quantity of used coding resources, and can reduce bit overheads of a bitstream.

Video picture decoding and encoding method and apparatus

An inter prediction method and apparatus, and a corresponding encoder and decoder are disclosed. The method includes: obtaining an index value of a length of a motion vector difference of the current picture block; determining target length information from a set of candidate length information based on the index value of the length; obtaining the motion vector difference of the current picture block based on the target length information; determining the motion vector target value of the current picture block based on the motion vector difference of the current picture block and the motion vector predictor of the current picture block; and obtaining a prediction block of the current picture block based on the motion vector target value of the current picture block.

Inter prediction method and apparatus, and corresponding encoder and decoder that reduce redundancy in video coding

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.

Video coding method and apparatus

This application discloses a motion vector obtaining method and apparatus, a computer device, and a storage medium. In the method, an initial motion vector of a to-be-processed picture block is determined by using a location relationship between a reference block and the to-be-processed picture block. When the reference block and the to-be-processed picture block are located in a same coding tree block, a decoder uses an initial motion vector of the reference block as the initial motion vector of the to-be-processed picture block. When the reference block and the to-be-processed picture block are located in different coding tree blocks, the decoder uses a final motion vector of the reference block as the initial motion vector of the to-be-processed picture block.

Motion vector obtaining method and apparatus, computer device, and storage medium

A picture decoding method includes determining motion information of a to-be-decoded block; obtaining a first decoding prediction block of the to-be-decoded block based on the motion information; performing motion search with first precision in the prediction reference picture block to obtain at least two second decoding prediction blocks; performing downsampling on the first decoding prediction block and the at least two second decoding prediction blocks to obtain a first sampling pixel array and at least two second sampling pixel arrays, respectively; calculating a difference between the first sampling pixel array and each of the second sampling pixel arrays, and using, as a target prediction motion vector, a motion vector corresponding to a second sampling pixel array with a minimum difference; and obtaining a target decoding prediction block of the to-be-decoded block based on the target prediction motion vector, and decoding the to-be-decoded block based on the target decoding prediction block.

Picture encoding and decoding method and apparatus for video sequence

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.

Inter prediction method and apparatus

Methods and apparatuses for inter prediction are disclosed. The method comprises: constructing a merging candidate list of a current picture block; when a number of merging candidates in the merging candidate list is less than a maximum number of candidates minus N, adding at least one history-based motion vector predictor (HMVP) candidate to the merging candidate list to obtain a new merging candidate list, wherein N is a positive integer; obtaining motion information of the current picture block based on the new merging candidate list; and determining a predicted block of the current picture block based on the motion information of the current picture block.

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.

Bidirectional inter prediction method and terminal based on motion vector difference reduction

A method for predicting motion information of a picture block and a related product is provided. The method includes: determining a candidate motion information list of a current picture block, where the candidate motion information list includes at least one combined candidate motion information, one combined candidate motion information is obtained by weighting P candidate motion information by using corresponding weighting factors; determining target motion information in the candidate motion information list; and predicting motion information of the current picture block based on the target motion information.

Method and apparatus for predicting motion information of picture block, encoder, and decoder

Inter prediction method and apparatus, and corresponding encoder and decoder

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.

Encoding method and apparatus, and decoding method and apparatus

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 temporal or 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.

Growing community of inventors

Beijing, China

Jianhua Zheng