INTERNATIONAL ISO/IEC STANDARD 23090-12 First edition 2023-08 Information technology Coded representation of immersive media - Part 12: MPEG immersive video Technologies de I'information Représentation codée de média immersifs- Partie 12: Vidéo immersive MPEG Reference number IEC IS0/IEC 23090-12:2023(E) OS1 @ IS0/IEC 2023 IS0/IEC 23090-12:2023(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 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 i @ IS0/IEC 2023 - All rights reserved IS0/IEC 23090-12:2023(E) @ Contents Page Foreword ..V Introduction. .. vi 1 Scope. 2 Normative reference. 3 Terms and definitions. 4 Abbreviated terms 5 Conventions 6 Overall v3C characteristics, decoding operations, and post-decoding processes ..4 7 Bitstream format, partitioning, and scanning processes ..4 7.1 General. ..4 7.2 V3C bitstream formats. .4 7.3 NAL bitstream formats .4 7.4 Partitioning of atlas frames into tiles ..4 7.5 Tile partition scanning processes .4 7.6 Mapping of views to V3C components. 7.7 Sources and outputs ..5 8 Syntax and semantics .6 8.1 Method of specifying syntax in tabular form 8.2 Specification of syntax functions and descriptors .6 8.3 Syntaxintabularform .6 8.3.1 General syntax. .6 8.3.2 V3C unit syntax ..6 8.3.3 Byte alignment syntax. .6 8.3.4 V3C parameter set syntax .6 8.3.5 NAL unit syntax. ..6 8.3.6 Raw byte sequence payloads, trailing bits, and byte alignment syntax .7 8.3.7 Atlas tile data unit syntax. 8.3.8 Supplemental enhancement information message syntax .7 8.3.9 V3C MIV extension syntax in tabular form. 8.4 Semantics .12 8.4.1 Generalsemantics .12 8.4.2 V3C MIV extension semantics ..12 8.4.3 Order of V3C units and association to coded information 19 9 Decoding process .20 9.1 General decoding process. .20 9.2 Atlas data decoding process. 20 9.2.1 General atlas data decoding process. 20 9.2.2 Decoding process for a coded atlas frame 20 9.2.3 Atlas NAL unit decoding process... 20 9.2.4 Atlas tile header decoding process 20 9.2.5 Decoding process for patch data units 20 9.2.6 Decoding process of the block to patch map 21 9.2.7 Conversion of tile level patch information to atlas level patch information 21 9.3 Occupancy video decoding process 22 9.4 Geometry video decoding process. 22 9.5 Attribute video decoding process 22 9.6 Packed video decoding process 22 9.7 Common atlas data decoding process. 22 9.7.1 General common atlas data decoding process. 22 9.7.2 Decoding process for a coded common atlas frame 23 9.7.3 Common atlas NAL unit decoding process. 23 IS0/IEC 2023 - All rights reserved iii IS0/IEC 23090-12:2023(E) 9.7.4 Common atlas frame order count derivation process. 23 9.7.5 Common atlas frame MIV extension decoding process .23 9.8 Sub-bitstream extraction process. 28 9.8.1 General 28 9.8.2 V3C unit extraction 28 9.8.3 NAL unit extraction process 28 9.8.4 Group extraction process 28 10 Pre-reconstruction process .28 11 Reconstruction process .28 12 Post-reconstruction process .28 13 Adaptation process .28 14 Parsing process .28 Annex A (normative) Profiles, tiers, and levels 29 Annex B (informative) Post-decoding conversion to nominal video formats .32 Annex C (informative) v3C sample stream format .34 Annex D (normative) NAL sample stream format. .35 Annex E (normative) Atlas hypothetical reference decoder .36 Annex F (normative) Supplemental enhancement information .37 Annex G (informative) Volumetric usability information .53 Annex H (Informative) Overview of the rendering processes .54 Bibliography 71 iv @ IS0/IEC 2023 - All rights reserved IS0/IEC 23090-12:2023(E) Forew