Huawei Technologies Co., Limited

Qualcomm Incorporated

Google Inc.

Future Wei Technologies, Inc.

Jianle Chen

Marta Karczewicz

Semih Esenlik

Xiang Yang Li

Anand Meher Kotra

Ye-Kui Wang

Li Feng Zhang

Haitao Yang

Wei-Jung Chien

Han Gao

Biao Wang

Yin Zhao

Vadim Seregin

Fnu Hendry

Krishnakanth Rapaka

Xin Zhao

Alexey Konstantinovich Filippov

Vasily Alexeevich Rufitskiy

Zhijie Zhao

Sergey Yurievich Ikonin

Huanbang Chen

Hsiao-Chiang Chuang

Kai Zhang

Ying Hai Chen

Roman Igorevich Chernyak

Yi-Wen Chen

Joel Sole Rojals

Wei Pu

Timofey Mikhailovich Solovyev

Hongbin Liu

Rajan Laxman Joshi

Liwei Guo

Alexander Alexandrovich Karabutov

Xiang Ma

Yu-Chen Sun

Hongtao Wang

Vladyslav Zakharchenko

Amir Said

Woo-Shik Kim

Feng Zou

Sungwon Lee

Elena Alexandrovna Alshina

Jiali Fu

Lian Zhang

Xianglin Wang

Adarsh Krishnan Ramasubramonian

Yuqun Fan

Huameng Fang

Ivan Krasnov

Maxim Borisovitch Sychev

F N U Hendry

Xiang Li

Muhammed Zeyd Coban

Chao Pang

Victor Alexeevich Stepin

Chengjie Tu

Dmitry Yurievich Kuryshev

Han Huang

Cheng-Teh Hsieh

Done Bugdayci Sansli

Venkata Meher Satchit Anand Kotra

Kangying Cai

Auke Joris Wiggers

Dana Kianfar

Debargha Mukherjee

Dmytro Rusanovskyy

Nan Hu

In Suk Chong

Dejun Zhang

Shan Gao

Yan Zhang

Yung-Hsuan Chao

Jiafeng Zhu

Mohammed Golam Sarwer

Weiwei Xu

Ting Fu

Guoxin Jin

Georgy Aleksandrovich Zhulikov

Birendra Kathariya

Wei Wang

Dejung Zhang

Jeffrey Moguillansky

Jie Shen

Wei Wei

The present disclosure relates to motion vector determination using template or bilateral matching and predictor generation based on the motion vector. The template or bilateral matching and/or the predictor generation use interpolation filtering. The interpolation filtering operation accesses integer sample positions within a window, and further uses padded sample values for integer sample positions outside the window, which are based on at least one sample within said window, and uses the accessed integer sample position values as well as the padded sample values to perform the template or bilateral matching and/or predictor generation.

Memory access window and padding for motion vector refinement and motion compensation

An apparatus and a method are provided for filtering reconstructed images, in particular, video images, with adaptive multiplicative filters. The efficiency of the filtering operation is increased by restricting the allowable values of the filter coefficients to those that have only a limited number of 'ones' in the binary representation.

Method and apparatus for image filtering with adaptive multiplier coefficients

Apparatuses and methods for Intra Sub-Partitions (ISP) are provided. The method includes: obtaining information of ISP, and determining a size of a chroma transform block (TB) of the coding unit based on SubWidthC and SubHeightC when at least a first condition is fulfilled. The first condition includes the information of ISP indicates that ISP is used for splitting the luma coding block. SubWidthC and SubHeightC are variables depending on chroma format information. The chroma format information indicates a chroma format of a picture the coding unit belongs to. The method can apply to all chroma format. The chroma format includes at least one of: 4:2:0, or 4:2:2, or 4:4:4. An accurate and versatile way to determine the size of the chroma transform block for the ISP is achieved.

Method and apparatus for intra sub-partitions coding mode

A non-transitory computer-readable medium for inter-prediction and an encoder are provided. An initial motion vector is obtained for a current block. Search space positions are determined according to the initial motion vector. Matching costs for the search space positions are checked according to a checking order to select a target search space position with a minimal matching cost. A refining motion vector of the current block is determined based on the initial motion vector and the target search space position. A central search space position is determined according to the checking order, and the central search space position is pointed to by the initial motion vector.

Encoder, a decoder and corresponding methods for inter-prediction

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 coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a first adaptation parameter set (APS) network abstraction layer (NAL) unit including an adaptive loop filter (ALF) type, a second APS NAL unit including a scaling list type, a third APS NAL unit including a luma mapping with chroma scaling (LMCS) type, and a slice. The mechanism further includes obtaining ALF parameters from the first APS NAL unit, obtaining scaling list parameters from the second APS NAL unit, and LMCS parameters from the third APS NAL unit. The mechanism further includes decoding the slice using the ALF parameters, the scaling list parameters, and the LMCS parameter. The mechanism further includes forwarding the slice for display as part of a decoded video sequence.

Adaptation parameter set types in video coding

A method of decoding includes determining, by the video decoder, whether a resolution of a current picture being decoded is the same as the resolution of reference pictures identified by a reference picture list associated with the current picture; enabling, by the video decoder, decoder-side motion vector refinement (DMVR) for a current block of the current picture when the resolution of the current picture is determined to be the same as the resolution of each of the reference pictures; disabling, by the video decoder, the DMVR for the current block of the current picture when the resolution of the current picture is determined to be different than the resolution of either of the reference pictures; and refining, by the video decoder, motion vectors corresponding to the current block using the DMVR when the DMVR flag is enabled for the current block.

Handling of decoder-side motion vector refinement (DMVR) coding tool for reference picture resampling in video coding

A deblocking method, for deblocking a transform block boundary within a coding block in an image encoding and/or an image decoding is provided, wherein the coding block comprising transform blocks is coded in inter prediction mode and the transform blocks comprises a first transform block and a second transform block. The method comprises: determining, when the boundary between the first transform block and the second transform block is a transform block boundary and at least one of the first transform block and the second transform block has one or more non-zero transform coefficients, a value of a BS parameter for the boundary between the first transform block and the second transform block to be a first value; and performing de-blocking filtering process to the boundary between the first transform block and the second transform block at least based on the value of the boundary strength parameter.

Encoder, a decoder and corresponding methods of deblocking filter adaptation

A method of decoding implemented by a video decoder including determining, by the video decoder, whether a resolution of a current picture being decoded is the same as the resolution of reference pictures identified by a reference picture list associated with the current picture; enabling, by the video decoder, bi-direction optical flow (BDOF) for a current block of the current picture when the resolution of the current picture is determined to be the same as the resolution of each of the reference pictures; disabling, by the video decoder, the BDOF for the current block of the current picture when the resolution of the current picture is determined to be different than the resolution of either of the reference pictures; and refining, by the video decoder, motion vectors corresponding to the current block using the BDOF when the BDOF is enabled for the current block.

Handling of bi-directional optical flow (BIO) coding tool for reference picture resampling in video coding

A method of decoding includes receiving a first picture parameter set and a second picture parameter set each referring to same sequence parameter set, the first picture parameter set and the second picture parameter set having same values of a conformance window when the first picture parameter set and the second picture parameter set have same values of picture width and picture height, and applying the conformance window to a current picture corresponding to the first picture parameter set or the second picture parameter set.

Handling of multiple picture size and conformance windows for reference picture resampling in video coding

A method of video coding, wherein the method comprises inter-prediction processing of a first block, wherein the inter-prediction processing comprises subpixel interpolation filtering of samples of a reference block; intra-prediction processing of a second block, wherein the intra-prediction processing comprises subpixel interpolation filtering of reference samples; wherein the method further comprises selecting interpolation filter coefficients for the subpixel interpolation filtering based on a subpixel offset between integer reference sample positions and fractional reference samples' positions, wherein for the same subpixel offsets the same interpolation filter coefficients are selected for intra-prediction processing and inter-prediction processing.

Method and apparatus for interpolation filtering for intra- and inter-prediction in video coding

The present disclosure relates to the field of picture processing. Especially, the disclosure deals with improving the prediction of a block of a picture when decoding or encoding. A method of coding a block of a picture, comprising: obtaining an indication parameter for a current coding block. The indication parameter represents whether a multi-hypothesis prediction is applied to the current coding block. When the indication parameter represents that the multi-hypothesis prediction is applied to the current coding block, coding the current coding block according to a planar mode.

Encoder, decoder and corresponding methods of most probable mode list construction for blocks with multi-hypothesis prediction

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

A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a flag and a picture including a sub-picture with a sub-picture boundary. The sub-picture is decoded. Filtering operations are performed across the sub-picture boundary when the flag is set to a first value. The filtering operations across the sub-picture boundary are omitted when the flag is set to a second value. The sub-picture is forwarded for display as part of a decoded video sequence.

Sub-picture level filtering in video coding

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San Diego, CA, United States of America

Jianle Chen