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

Yin Zhao

Jianle Chen

Lian Zhang

Jiantong Zhou

Xiang Ma

Sixin Lin

Shan Gao

Houqiang Li

Hong Zhang

Shan Liu

Jiali Fu

Sergey Yurievich Ikonin

Ye-Kui Wang

Lei Zhang

Bin Li

Lin Yang

Elena Alexandrovna Alshina

Roman Igorevich Chernyak

Timofey Mikhailovich Solovyev

Alexander Alexandrovich Karabutov

Maxim Borisovitch Sychev

Vasily Alexeevich Rufitskiy

Alexey Konstantinovich Filippov

Xu Chen

Li Li

Lu Yu

Siwei Ma

Zhao Wang

Lei Li

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

Sriram Sethuraman

Shaobo Zhang

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

Yuqun Fan

Ting Fu

Zhongliang Li

Riyang Zhao

Dong Liu

Chen Chen

Hualong Yu

Yilin Chang

Fangdong Chen

Hui Yuan

Yibin Ying

Yang Liu

Jeeva Raj A

Victor Alexeevich Stepin

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 method for decoding a coded video bitstream is provided. The method includes: obtaining a reference layer syntax element by parsing the coded video bitstream, wherein a value of the reference layer syntax element specifying whether a layer with index k is a direct reference layer for a layer with index i; determining whether the layer with index j is a reference layer for the layer with index i based on the value of the reference layer syntax element; and when a condition is satisfied, predicting a picture of the layer with index i based on the layer with index j, wherein the value of a chroma format related syntax element applied to the layer with index i is the same as the value of a chroma format related syntax element applied to the layer with index j.

Encoder, decoder and corresponding methods and apparatus

A method for coding a video implemented in an encoder or a decoder including the enhanced interpolation filter, EIF, for motion compensation, the method comprising: i) determining control point motion vectors, CPMVs, for a block according to affine inter-prediction, the block being an affine block or a sub-block of the affine block; ii) for a predefined sub-block size determining a reference area for a sub-block with the predefined sub-block size according to values of the CPMVs; iii) comparing the determined reference area with a predefined threshold; iv) applying EIF for motion compensation, comprising deriving the pixel-based motion vector field for the block; wherein if the determined reference area is larger than the threshold, deriving the pixel-based motion vector field for the block further comprises motion vector clipping, wherein motion vector clipping range is determined based on motion model of the block and the size of the block.

Affine motion model restrictions for memory bandwidth reduction of enhanced interpolation filter

A video decoding method includes determining a usage of an SVT-vertical (V) or an SVT-horizontal (H) for a residual block; determining a transform block position of a transform block of the residual block; determining a transform type of the transform block, wherein the transform type indicates a horizontal transform and a vertical transform for the transform block, wherein at least one of the horizontal transform or the vertical transform is a discrete sine transform (DST)-7; and reconstructing the residual block based on the transform type, the transform block position, and transform coefficients of the transform block.

Spatially varying transform with adaptive transform type

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

Growing community of inventors

Shenzhen, China

Haitao Yang