ISO/IEC INTERNATIONAL STANDARD 23090-5 Second edition 2023-11 Information technology Coded representation of immersive media - Part 5: Visual volumetric video-based coding (V3C) and video-based point cloud compression (V-PCC) Technologie de I'information Repreésentation codée de média immersifs Partie 5: Codage base sur la vidéo volumétrique (V3C) et compression de nuage de points basée sur la vidéo (V-PCC) Reference number IEC IS0/IEC 23090-5:2023(E) OSI @IS0/IEC2023 IS0/IEC 23090-5:2023(E) COPYRIGHT PROTECTED DOCUMENT IS0/IEC2023 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 the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below 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: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @IS0/IEC 2023-All rights reserved IS0/IEC 23090-5:2023(E) @ Contents Page Foreword ..V Introduction. .vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Abbreviated terms .15 5 ..16 Conventions 5.1 General .16 5.2 Arithmetic operators. ..17 5.3 Logical operators. 17 5.4 Relational operators ..17 5.5 Bit-wise operators. .17 5.6 Assignment operators .18 5.7 Other operators ..18 5.8 Mathematical functions. .18 5.9 Order of operation precedence 19 5.10 Variables, syntax elements, and tables 20 5.11 Text description of logical operations 21 5.12 Processes. 23 6 Overall v3C characteristics, decoding operations, and post-decoding processes .23 6.1 V3C characteristics. 23 6.2 V3c bitstream characteristics, decoding operations, and post-decoding processes ..26 7 Bitstream format, partitioning, and scanning processes .27 7.1 General. 27 7.2 V3C bitstream formats. .27 7.3 NAL bitstream formats. ..28 7.4 Partitioning of atlas frames into tiles .28 7.5 Tile partition scanning process .29 8 Syntax and semantics .30 8.1 Method of specifying syntax in tabular form .30 8.2 Specification of syntax functions and descriptors 31 8.3 Syntax in tabular form. .33 8.3.1 General .33 8.3.2 V3C unit syntax 35 8.3.3 Byte alignment syntax. 36 8.3.4 v3C parameter set syntax 36 8.3.5 NAL unit syntax .42 8.3.6 Raw byte sequence payloads, trailing bits, and byte alignment syntax. .43 8.3.7 Atlas tile data unit syntax 50 8.3.8 Supplemental enhancement information message syntax 54 8.4 Semantics 55 8.4.1 General 55 8.4.2 V3C unit semantics 55 8.4.3 Byte alignment semantics 57 8.4.4 v3C parameter set semantics 57 8.4.5 NAL unit semantics. 67 8.4.6 Raw byte sequence payloads, trailing bits, and byte alignment semantics ..7 8.4.7 Atlas tile data unit semantics 91 8.4.8 Supplemental enhancement information message semantics. .99 9 Decoding process .99 9.1 General decoding process .99 IS0/IEC2023-Allrightsreserved iii IS0/IEC 23090-5:2023(E) 9.2 Atlas data decoding process 101 9.2.1 General atlas data decoding process. 101 9.2.2 Decoding process for a coded atlas frame 101 9.2.3 Atlas NAL unit decoding process. 102 9.2.4 Atlas tile header decoding process 103 9.2.5 Decoding process for patch data units 107 9.2.6 Decoding process of the block to patch map 122 9.2.7 Conversion of tile level patch information to atlas level patch information 123 9.3 Occupancy video decoding process 125 9.4 Geometry video decoding process. 126 9.5 Attribute video decoding process. 129 9.6 Packed video decoding process. 131 9.7 Common atlas data decoding process. 132 9.7.1 General common atlas data decoding proces 132 9.7.2 Decoding process for a coded common atlas frame 133 9.7.3 Common atlas NAL unit decoding process. 133 9.7.4 Common atlas frame order count derivation process 133 9.8 Sub-bitstream extraction process. 135 9.8.1 General 135 9.8.2