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

Fnu Hendry

Yin Zhao

Vadim Seregin

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

A video coding mechanism is disclosed. The mechanism includes partitioning an image to create at least one coding tree unit (CTU) with at least one coding tree node. The mechanism further includes determining that the coding tree node height is twice a maximum transform unit (TU) height and the coding tree node width is twice a maximum TU width. The mechanism further includes selecting a split mode for the coding tree node based on the determination. The split mode is selected from a quad-tree split, a horizontal binary-tree split, and no split. The mechanism further includes applying the split mode to the coding tree node to create one or more coding units (CUs). The mechanism further includes encoding the CUs into a bitstream. The mechanism further includes transmitting the bitstream toward a decoder.

Constrained coding tree for video coding

A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), the PU including a picture header (PH) network abstraction layer (NAL) unit having a picture header NAL unit type (PH_NUT) and an associated video coding layer (VCL) NAL unit, the PH_NUT signifying that a layer identifier (ID) of the PH NAL unit is equal to a layer ID of the associated video coding layer (VCL) NAL unit and a temporal ID of the PH NAL unit is equal to a temporal ID of the PU; and decoding a coded picture from the PU to obtain a decoded picture.

Signaling of picture header in video coding

Apparatuses and methods for encoding and decoding are provided. The method for intra predicting a chroma sample of a block by applying cross-component linear model includes: obtaining reconstructed luma samples; determining maximum and minimum luma sample values based on the reconstructed luma samples; obtaining a difference of the maximum and minimum luma sample values. The method also includes: fetching a value out of a lookup table (LUT) by using a set of bits as an index, the set of bits following a position of the most-significant bit; obtaining linear model parameters based on the fetched value; and calculating a predicted chroma sample value by using the obtained linear model parameters. The efficiency to fetch the value out of the LUT is increased.

Method and apparatus of cross-component linear modeling for intra prediction

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

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San Diego, CA, United States of America

Jianle Chen