Huawei Technologies Co., Limited

University of Science and Technology of China

Other

Chinese Academy of Sciences

Beijing Zhongkaihongde Technology Co., Ltd

Future Wei Technologies, Inc.

Zhejiang University

Huawei Technologies,co., Ltd.

Boe Technology Group Co., Ltd.

Zte Corporation

Beijing Boe Display Technology Co., Ltd.

Petrochina Company Limited

Sanechips Technology Co., Ltd.

Huawei Technoloiges Co., Ltd.

Chengdu Easton Biopharmaceuticals Co., Ltd

Haitao Yang

Huanbang Chen

Jianle Chen

Lian Zhang

Jiantong Zhou

Xiang Ma

Sixin Lin

Shan Gao

Houqiang Li

Shan Liu

Jiali Fu

Lin Yang

Sergey Yurievich Ikonin

Roman Igorevich Chernyak

Ye-Kui Wang

Lei Zhang

Bin Li

Yin Zhao

Hong Zhang

Elena Alexandrovna Alshina

Vasily Alexeevich Rufitskiy

Alexey Konstantinovich Filippov

Xu Chen

Li Li

Lu Yu

Timofey Mikhailovich Solovyev

Alexander Alexandrovich Karabutov

Maxim Borisovitch Sychev

Siwei Ma

Zhao Wang

Lei Li

Yuqun Fan

Min Liu

Xin Huang

Feng Drake Zhu

Wei Li

Xin Li

Li Wang

Junyan Huo

Fuzheng Yang

Han Gao

Jing Wen Wang

Qing Dong

Wei Peng Huang

Jing Jing Xiao

Jie Liu

Shaobo Zhang

Sriram Sethuraman

Tao Liu

Zhuoyi Lv

Oscar Au

Xingyu Zhang

Weiwei Xu

Qingshan Zhu

Chuanlin Fan

Qixun Ban

Xingwei Huang

Ruopu Huang

Feng Wu

Wenheng Mu

Cunhu Wang

Fan Liang

Jibin Liu

Fan Mu

Ting Fu

Zhongliang Li

Riyang Zhao

Dong Liu

Chen Chen

Hualong Yu

Yilin Chang

Fangdong Chen

Hui Yuan

Yibin Ying

Yang Liu

Victor Alexeevich Stepin

Jeeva Raj A

Sagar Kotecha

Quanhe Yu

Guangyao Zhao

Jian Li

Ying Wang

Yu Zhang

Lijun Mu

Changquan Ai

Youngjin Song

Xiaoxia Wei

Guodong Cen

Fei Xu

Yuan Yuan

Xiuqin Rao

Yunyou Zheng

Jay Nitin Shingala

Chao Pang

A video decoding method includes obtaining a to-be-entropy-decoded syntax element in a current block by parsing a received bitstream, where the to-be-entropy-decoded syntax element includes a syntax element 1 or a syntax element 2 in the current block, obtaining a context model corresponding to the to-be-entropy-decoded syntax element, where both of a context model corresponding to the syntax element 1 and a context model corresponding to the syntax element 2 are determined from the same preset context model set, entropy decoding the to-be-entropy-decoded syntax element based on the context model corresponding to the to-be-entropy-decoded syntax element, and obtaining a reconstructed image of the current block based on the syntax element obtained by entropy decoding.

Video decoding method and video decoder

The present disclosure provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a distance between control points for an affine picture block; determining a motion vector difference for the affine picture block, motion vectors of the control points being used to determine the motion vector difference; and performing coding processing on the affine picture block over a size that includes a horizontal length and a vertical length, wherein the horizontal length and the vertical length vary based on the distance between the control points, the motion vector difference, and a motion vector precision.

Adaptive affine motion compensation unit determing in video picture coding method, video picture decoding method, coding device, and decoding device

The present invention relates to the field of video image processing, and provides a filtering method and an apparatus, to resolve a problem that subjective quality and objective quality of an image deteriorate because filtering processing cannot be performed on internal blocks of a non-translational motion prediction unit.

Filtering method for removing blocking artifact and apparatus

A method for inverse quantization of a current block of a picture is provided. The method is performed by a decoder, and the picture comprises a luminance component and a chrominance component, where the luminance component and the chrominance component are partitioned into multiple blocks. The method includes obtaining one or more existing quantization parameter (QP) values from a received bitstream, wherein the one or more existing QP values are associated with a current block in the chrominance component; determining a QP value for the current block in the chrominance component based on the one or more existing QP values; performing inverse quantization on the current block in the chrominance component using the determined QP value.

Apparatus and method for inverse quantization

This application provides a motion vector obtaining method and apparatus. The method includes: determining a target offset vector of a block and identifier information of a target picture, wherein the block comprises at least one sub-block; determining a location of the sub-block; determining, as a target location coordinate value of a collocated sub-block, a location coordinate value obtained by performing a clipping operation on an initial location coordinate value in a range, wherein the initial location coordinate value is based on the location of the sub-block and the target offset vector; and obtaining a motion vector of the sub-block based on a motion vector corresponding to the target location coordinate value. Thus, a range of the target offset vector is limited, so that a quantity of memory read times can be reduced in a process of obtaining the motion vector of the collocated sub-block.

Motion vector obtaining method and apparatus

Image encoding and decoding methods, apparatuses and computer-readable media are described. An example decoding method include: determining a first decoded unit from two decoded units on a left side of a to-be-decoded unit and a second decoded unit from three decoded units above the to-be-decoded unit; calculating first and second motion vector predictors (MVPs) of M control points of the to-be-decoded unit based on motion vectors of control points of the first and the second decoded units, respectively; generating a first and a second motion vector group based on the first and the second MVPs of the M control points, respectively; determining a target motion vector group from motion vector groups comprising the first motion vector group and the second motion vector group; and predicting the to-be-decoded unit based on the target motion vector group.

Image decoding and encoding method and apparatus based on units of a same motion prediction mode obtained by two independent sequences

A video data inter prediction method is provided, which includes: determining a candidate motion information list of a current picture block, where the candidate motion information list includes at least one first candidate motion information group, at least one second candidate motion information group, the first candidate motion information group is a motion information group determined based on motion information of preset locations on a first neighboring picture block of the current picture block and a motion model of the first neighboring picture block, the second candidate motion information group is a set of motion information of at least two sample locations that are respectively neighboring to at least two preset locations on the current picture block; determining target motion information from the candidate motion information list; and performing inter prediction on the current picture block based on the target motion information.

Video data inter prediction based on control points

An image prediction method, apparatus, and system, a device, and a storage medium are provided. The method includes: (401) obtaining a split mode of a current node, where the current node is an image block in a coding tree unit in a current image; (402) determining, based on the split mode of the current node and a size of the current node, whether the current node satisfies a first condition; and (403) when it is determined that the current node satisfies the first condition, performing intra prediction on all coding blocks belonging to the current node, to obtain predictors of all the coding blocks belonging to the current node.

Image prediction method, apparatus, and system, device, and storage medium

An inter prediction method includes determining whether a non-rectangular inter prediction mode is allowed for a group of blocks; obtaining one or more inter prediction mode parameters and weighted prediction parameters for the group of blocks; and obtaining prediction value of a current block based on the one or more inter prediction mode parameters and weighted prediction parameters, wherein one of the inter prediction mode parameters indicates reference picture information for the current block, and wherein the group of blocks comprises the current block.

Method and apparatus of harmonizing weighted prediction with non-rectangular merge modes

A prediction mode determining method includes determining a split mode for a current picture block, determining whether a first picture subblock that meets a preset condition is obtained after the current picture block is split in the split mode, splitting the current picture block in the split mode to obtain a plurality of picture subblocks in response to determining that the first picture subblock is obtained after the current picture block is split, and determining that a same prediction mode is used for the plurality of picture subblocks. The plurality of picture subblocks comprise the first picture subblock. The prediction mode for the plurality of picture subblocks is an intra prediction mode or an inter prediction mode.

Prediction mode determining method and apparatus, encoding device, and decoding device

Embodiments of this application discloses bi-directional inter prediction methods and apparatuses. One method includes: determining a reference picture index iof a first reference picture list as a first reference picture index corresponding to a current block, determining a reference picture index iof a second reference picture list as a second reference picture index corresponding to the current block, and predicting the current block based on the first reference picture index and the second reference picture index, wherein the current picture comprises the current block.

Bi-directional inter prediction method and apparatus

A picture prediction method includes: determining motion vectors of W control points in a current picture block; obtaining motion vectors of P pixel units of the current picture block by using a motion model and the motion vectors of the W control points, where precision of the determined motion vectors of the W control points is 1/n of pixel precision, precision of the motion vector of each of the P pixel units is 1/N of the pixel precision, the motion vector of each of the P pixel units is used to determine a corresponding reference pixel unit in a reference picture of a corresponding pixel unit; and performing interpolation filtering on a pixel of the corresponding reference pixel unit by using an interpolation filter with a phase of Q, to obtain a predicted pixel value of each of the P pixel units.

Picture prediction method and picture prediction apparatus

A video decoding method includes parsing a bitstream to obtain a split mode to transform units (TUs) in a current coding unit (CU). Each of the TUs includes a serial number in a one-to-one correspondence with positions of the TUs in the current CU. A transform coefficient of a luminance transform block of a current TU in the TUs is obtained. A transform type of the luminance transform block of the current TU is obtained based on the split mode and a serial number of the current TU. An inverse transform on the transform coefficient of the luminance transform block of the current TU is performed based on the transform type of the luminance transform block of the current TU to obtain a reconstructed residual of the luminance transform block of the current TU. A reconstructed block of the current CU is obtained based on the reconstructed residual.

Video encoder, video decoder, and corresponding method

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.

Intra-frame prediction and decoding methods and apparatuses for image signal

This application provides a video picture prediction method and apparatus, to resolve a problem in a conventional technology that a length of a coded video sequence is increased. The first type of identifier may be added to a bitstream. The first type of identifier is used to indicate whether an affine motion model-based inter prediction mode is enabled for a video picture. For a video picture or a picture block included in the slice for which the affine motion model does not need to be used, a parameter, related to the affine motion model, of the picture block may not need to be transmitted. On a decoder side, during decoding of the picture block, the parameter related to the affine motion model does not need to be parsed. This can reduce load of a decoder, increase a processing speed, and decrease a processing time.

Video picture prediction method and apparatus

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Shenzhen, China

Haitao Yang