Qualcomm Incorporated

Bytedance Inc.

Huawei Technologies Co., Limited

Beijing Bytedance Network Technology Co., Ltd.

Nokia Corporation

Lemon Inc.

Nokia Technologies Oy

Future Wei Technologies, Inc.

Conversant Wireless Licensing S.a R.l.

Velos Media, LLC

Zhejiang University

Core Wireless Licensing S.a.r.l.

Amotech Co., Ltd.

Bytdance Inc.

Sisvel International S.a.

Ye-Kui Wang

Fnu Hendry

Li Feng Zhang

Ying Hai Chen

Kai Zhang

Adarsh Krishnan Ramasubramonian

Jianle Chen

Zhipin Deng

Miska Matias Hannuksela

Jizheng Xu

Krishnakanth Rapaka

Marta Karczewicz

Ying Chen

Vadim Seregin

Xiang Yang Li

Thomas Stockhammer

Weijia Zhu

Hongbin Liu

Muhammed Zeyd Coban

Yang Wang

Rajan Laxman Joshi

Chao Pang

Peiyun Di

Yue Wang

Hong Heather Yu

Wei Pu

Igor D Curcio

Wei-Jung Chien

Xianglin Wang

Haitao Yang

Xiang Li

Kui Fan

Yuqun Fan

F N U Hendry

Huameng Fang

Hongbing Li

Houqiang Li

Maxim Borisovitch Sychev

Chunbo Zhu

Geert Van Der Auwera

Joel Sole Rojals

Emre Baris Aksu

Dmytro Rusanovskyy

Nikolai Konrad Leung

Vladyslav Zakharchenko

Tingfang Tang

Li Zhang

Yuejing Yin

Gordon Kent Walker

Ning Bi

Yin Zhao

Yue Chen

Lu Yu

Bijan Forutanpour

Haibin Yin

Hualong Yu

Yunchao Gao

Lingyu Li

Semih Esenlik

Sujeet Shyamsundar Mate

Jun Tian

Giridhar Dhati Mandyam

Zhijie Zhao

Charles Nung Lo

Peng Zhang

Lei Zhang

Cheng-Teh Hsieh

Yu Huang

Yiliang L Bao

Sungwon Lee

Waqar Zia

Imed Bouazizi

Done Bugdayci Sansli

Justin Ridge

Sanqi Li

Phi Hung Nguyen

Stephan Wenger

Johannes Sauer

Yi Guo

Le Yang

Varun Singh

Jianping Chen

Juha Tapani Purho

Jörg Ott

Xiaoding Gao

Hendry

Dejung Zhang

Jegadish Devadoss

Dong Tian

Xiangyu Lin

Yongyi Yu

Marta Karczweicz

Jeffrey Moguillansky

Fnu Henry

Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video and a bitstream of the video. The bitstream conforms to a format rule. The bitstream includes one or more layers including one or more picture units (PUs). The format rule specifies that, responsive to a first PU in a layer of the bitstream following an end of sequence network abstraction layer (EOS NAL) unit in the layer in a decoding order, a variable of the first PU is set to a particular value, wherein the variable indicates whether the first PU is a coded layer video sequence start (CLVSS) PU.

Indication of end of sequence in coded video

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

A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes parsing a flag; parsing candidates for a first reference picture list structure; determining that candidates for a second reference picture list structure are not present in the coded video bitstream and inferring that the candidates for the second reference picture list structure are the same as the candidates for the first reference picture list structure when the flag has a first value; determining that the candidates for the second reference picture list structure are present in the coded video bitstream when the flag has a second value; generating a reference picture list using the candidates for the first reference picture list structure or the candidates for the second reference picture list structure; and performing inter-prediction based on the reference picture list to generate a reconstructed block.

Candidate signaling for reference picture list structures

A mechanism for processing video data is disclosed. A dependent random access point (DRAP) sample entry is signaled in a DRAP sample group. The DRAP sample entry describes one or more DRAP samples. A conversion is performed between a visual media data and a visual media data file based on the DRAP sample entry.

Dependent random access point sample entry signaling

Video processing, including video coding, video decoding and video transcoding, is described. One example method includes performing a conversion between a video comprising a video picture and a bitstream of a video according to a rule, where the rule specifies that syntax elements indicate a first width and a first height of a scaling window for the video picture, and where the rule specifies that a range of permissible values for the syntax elements include values greater than or equal to two times a second width of the video picture and two times a second height of the video picture.

Scaling window in video coding

Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a video and a bitstream of the video including one or more output layer sets (OLSs) according to a rule. The rule specifies that a subpicture level information (SLI) supplemental enhancement information (SEI) message includes information about a level of subpicture sequences in a set of coded video sequences of the one or more OLSs to which the SLI SEI message applies. A syntax structure of the SLI SEI message includes at least (1) a first syntax element specifying a maximum number of sublayers for the subpicture sequences and (2) a second syntax element specifying whether level information for the subpicture sequences is present for one or more sublayer representations.

Sublayer signaling in a video bitstream

A method of video decoding comprises receiving a bitstream including a picture parameter set (PPS) containing a single slice per subpicture flag; determining whether the single slice per subpicture flag has a first value or a second value, where the first value specifies that each subpicture referring to the PPS includes one and only one rectangular slice, and where the second value specifies that each subpicture referring to the PPS may include one or more rectangular slices; decoding the one and only one rectangular slice when the single slice per subpicture flag has the first value and the one or more rectangular slices when the single slice per subpicture flag has the second value.

Indication of one slice per subpicture in subpicture-based video coding

A method for processing media data includes identifying in a media presentation description (MPD) an indication of a Tuning-In Media Segment. The Tuning-In Media Segment comprises a latest media data for a client device to start with when tuning into an ongoing live streaming service. The latest media data is selected from either a current media segment that is being generated by the ongoing live streaming service or a previous media segment generated by the ongoing live streaming service based on a length of the current media segment. The MPD is stored by the client device prior to the client device tuning into the ongoing live streaming service. The method further includes performing a conversion between a visual media data and a bitstream according to the MPD.

Minimizing initialization delay in live streaming

A method of decoding a coded video bitstream is provided. The method includes parsing a slice header of a current slice represented in the coded video bitstream. The slice header includes a reference picture list structure. The method also includes deriving, based on the reference picture list structure, a reference picture list of the current slice; and obtaining, based on the reference picture list, at least one reconstructed block of the current slice.

Reference picture management in video coding

Methods and apparatus for processing of video are described. A video processing method includes performing a conversion between a video including multiple layers of one or more pictures and a bitstream of the video according to a format rule. The format rule specifies that a reference picture referred to by each inter-layer reference picture entry in a reference picture list of a slice of a current picture of a current layer satisfies a constraint. The constraint is at least one of: (a) the reference picture is an intra random access (IRAP) picture or (b) the reference picture has a temporal identifier that is less than or equal to a certain value that is a function of a maximum allowed value of a video layer to which slices from the current layer can reference. The maximum allowed value is indicated in a syntax element.

Sublayers information in video coding

A method of decoding is provided. The method includes receiving, by the video decoder, a video bitstream including a video parameter set (VPS) and a plurality of layers, where each layer is included in at least one output layer set (OLS) specified by the VPS; and decoding, by the video decoder, a picture from one of the plurality of layers. A method of encoding is also provided. The method of encoding includes generating, by the video encoder, a plurality of layers and a video parameter set (VPS) specifying one or more output layer sets (OLSs), wherein each layer from the plurality of layers is included in at least one of the OLSs specified by the VPS; encoding, by the video encoder, the plurality of layers and the VPS into a video bitstream; and storing, by the video encoder, the video bitstream for communication toward a video decoder.

Disallowing unused layers in multi-layer video bitstreams

A video coding mechanism is disclosed. The mechanism includes partitioning a picture into a plurality of first level tiles. A subset of the first level tiles is partitioned into a plurality of second level tiles. Each second level tile contains a single rectangular slice of picture data. The first level tiles and the second level tiles are encoded into a bitstream. The bitstream is stored for communication toward a decoder.

Flexible tiling in video coding

A method of decoding a coded video bitstream is provided. The method includes parsing a flag; parsing a first reference picture list structure; determining that an index to a second reference picture list structure is not present in a slice header of the coded video bitstream and inferring that the index to the second reference picture list structure is the same as an index to the first reference picture list structure when the flag has a first value; determining that the index to the second reference picture list structure is present in the slice header when the flag has a second value; generating a reference picture list using the first reference picture list structure or the second reference picture list structure; and performing inter-prediction based on the reference picture list to generate a reconstructed block.

Index signaling for reference picture list structures

A video coding mechanism is disclosed. The mechanism includes a bitstream comprising a parameter set and one or more sub-pictures partitioned from a picture. The parameter set is parsed to obtain a flag indicating that a current sub-picture is a temporal motion constrained sub-picture. The current sub-picture is extracted from the bitstream independently of the picture and based on the flag. The current sub-picture is decoded to create a video sequence. The video sequence is forwarded for display.

Temporal motion constrained sub-picture signaling in video coding

A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a flag and a plurality of coded pictures including an intra random access point (IRAP) picture and one or more non-leading pictures associated with the IRAP picture. When the flag is set to a first value any leading pictures associated with the IRAP picture precede, in decoding order, all non-leading pictures associated with the IRAP picture. When the flag is set to a second value a non-leading picture precedes, in decoding order, an initial leading picture associated with the IRAP picture. The IRAP picture, any leading pictures associated with the IRAP picture, and the one or more non-leading pictures associated with the IRAP picture are decoded in decoding order based on the flag.

Interlaced video coding with leading pictures

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Ye-Kui Wang