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

Wei-Jung Chien

Haitao Yang

Han Gao

Biao Wang

Yin Zhao

Vadim Seregin

Fnu Hendry

Krishnakanth Rapaka

Xin Zhao

Alexey Konstantinovich Filippov

Vasily Alexeevich Rufitskiy

Zhijie Zhao

Huanbang Chen

Sergey Yurievich Ikonin

Hsiao-Chiang Chuang

Kai Zhang

Ying Hai Chen

Yi-Wen Chen

Roman Igorevich Chernyak

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

Maxim Borisovitch Sychev

F N U Hendry

Ivan Krasnov

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

Li Zhang

In Suk Chong

Dejun Zhang

Nan Hu

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

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

A method and image processing device are provided, including a deblocking filter. The deblocking filter modifies values of at most MA samples of the first image block as first filter output values, the at most MA samples being located at a column of the first image block that is perpendicular to and adjacent to the horizontal block edge; and modifies values of at most MB samples of the second image block as second filter output values, the at most MB samples being located at a column of the second image block that is perpendicular to and adjacent to the horizontal block edge. At most a number MA of sample values of the first image block adjacent to the block edge are modified and at most a number MB of sample values of the second image block adjacent to the block edge are modified, wherein MA<MB.

Apparatus and method for deblocking filter in video coding

The present disclosure provides an encoding apparatus and a decoding apparatus, as well as an encoding method and a decoding method. In particular, the present disclosure relates to block partitioning and signaling the partitioning parameters in a bitstream. An override flag in a slice header indicates whether or not a block is to be partitioned according to a first partition constraint information. The override flag is included in the bitstream and the block is partitioned accordingly.

Video encoder, a video decoder and corresponding methods with improved block partitioning

A method of decoding a coded video bitstream implemented by a video decoder is disclosed. The method includes determining that a coded video sequence (CVS) of the coded video bitstream includes a video coding layer (VCL) network abstraction layer (NAL) unit having a gradual decoding refresh (GDR) network abstraction layer (NAL) unit type (GDR_NUT), the VCL NAL unit having the GDR_NUT containing a GDR picture; initiating decoding of the CVS at the GDR picture; and generating an image according to the CVS as decoded. A corresponding method of encoding is also disclosed.

Gradual decoding refresh in video coding

The present disclosure relates generally to video coding and picture partitioning methods. In particular, the disclosure is concerned with relations between partition constraint elements, by setting partitioning rules for different picture partitioning methods. The disclosure provides devices and corresponding methods for generating or processing a bitstream including encoded pictures, particularly for setting and including partition constraint element into the bitstream. One of the devices is configured to determine a minimum luma size of a leaf block resulting from quadtree splitting (MinQtSizeY), determine a maximum luma size of a coding block where partitioning using a binary tree splitting is allowed (MaxBtSizeY) based on the MinQtSizeY, and include information for the determined MinQtSizeY into the bitstream.

Relation between partition constraint elements

A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), where the PU includes a picture header (PH) network abstraction layer (NAL) unit preceding a first video coding layer (VCL) NAL unit, and decoding a coded picture from the PU to obtain a decoded picture.

Signaling of picture header in video coding

A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), where a gradual decoding refresh (GDR) flag in a picture header (PH) of the PU has a first value to specify that a picture associated with the PH is a GDR picture; and decoding the GDR picture from the PU to obtain a decoded picture.

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San Diego, CA, United States of America

Jianle Chen