INTERNATIONAL ISO/IEC STANDARD 23090-3 Second edition 2022-09 Information technology Coded representation of immersive media - Part 3: Versatile video coding Technologies de I'information - Représentation codée de média immersifs- Partie 3: Codage vidéo polyvalent Reference number IS0/IEC 23090-3:2022(E) ISO EC @ IS0/IEC 2022 IS0/IEC23090-3:2022(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISO's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2022 - All rights reserved IS0/IEC FDIS23090-3:2022(E) Contents Foreword. vi Introduction ..vii 1 Scope.. 2 Normative references. 3 Terms and definitions.. 4 Abbreviated terms . .16 5 Conventions .18 5.1 General. .18 5.2 Arithmetic operators. .19 5.3 Logical operators.... 19 5.4 Relational operators .. 19 5.5 Bit-wise operators... 5.6 5.7 5.8 Mathematical functions .20 5.9 Order of operation precedence .21 5.10 Variables, syntax elements and tables... .22 5.11 Text description of logical operations.. .23 5.12 Processes.... ..24 6 Bitstream and picture formats, partitionings, scanning processes and neighbouring relationship.... 6.1 Bitstream formats.... 25 6.2 Source, decoded and output picture formats .. 25 6.3 Partitioning of pictures, subpictures, slices, tiles, and CTUs. 27 6.3.1 Partitioning of pictures into subpictures, slices, and tiles . 27 6.3.2 Block, quadtree and multi-type tree structures .... 30 6.3.3 Spatial or component-wise partitionings.. 6.4 Availability processes.. 6.4.1 Allowedquadsplitprocess.. 31 6.4.2 Allowed binary split process.... 32 6.4.3 Allowed ternary split process . 34 6.4.4 Derivation process for neighbouring block availability.. 35 6.5 Scanning processes... .36 6.5.1 CTB raster scanning, tile scanning, and subpicture scanning processes 36 6.5.2 Up-right diagonal scan order array initialization process .40 6.5.3 Horizontalandvertical traversescan order arrayinitializationprocess. .40 7 Syntaxandsemantics .41 7.1 Method of specifying syntax in tabular form. 41 7.2 Specification of syntax functions and descriptors. 42 7.3 Syntax in tabular form .. .44 7.3.1 NAL unit syntax. 44 7.3.2 Raw byte sequence payloads, trailing bits and byte alignment syntax... 7.3.3 Profile, tier, and level syntax... .64 7.3.4 DPB parameters syntax.. .67 7.3.5 Timing and HRD parameters syntax ... +.67 7.3.6 Supplemental enhancement information message syntax ..68 7.3.7 Slice header syntax. ..68 7.3.8 Weighted prediction parameters syntax... 7.3.9 Reference picture lists syntax.. 72 @ IS0/IEC 2022 - All rights reserved ili IS0/IEC FDIS 23090-3:2022(E) 7.3.10 Reference picture list structure syntax. 72 7.3.11 Slice data syntax. 73 7.4 .95 7.4.1 General 95 7.4.2 NAL unit semantics.. 95 7.4.3 Raw byte sequence payloads, trailing bits and byte alignment semantics 104 7.4.4 Profile, tier, and level semantics... .163 7.4.5 DPB parameters semantics... 169 7.4.6 Timing and HRD parameters semantics . 170 7.4.7 Supplemental enhancement information message semantics 175 7.4.8 Slice header semantics..... 175 7.4.9 Weighted prediction parameters semantics 185 7.4.10 Reference picture lists semantics.. 187 7.4.11 Reference picture list structure semantics. 188 7.4.12 Slicedatasemantics .189 8 Decoding process. ..215 8.1 General decoding process. .215 8.2 NAL unit decoding process. ..218 8.3 Slice decoding process.... .218 8.3.1 Decoding process for picture order count.. ..218 8.3.2 Decoding process for reference picture lists construction. .220 8.3.3 Decoding process for reference picture marking.... 8.3.4 Decoding process for generating unavailable reference pict