INTERNATIONAL ISO/IEC STANDARD 23001-12 Second edition 2018-12 Information technology - MPEG systems technologies Part 12: Sample variants Technologies de I'information - Technologies des systemes MPEG - Partie 12: Variantes d'échantillon Reference number IEC IS0/IEC 23001-12:2018(E) os1 @ IS0/IEC 2018 IS0/IEC 23001-12:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC 2018 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 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2018 - All rights reserved IS0/IEC 23001-12:2018(E) Contents Page Foreword ..V 1 Scope .1 2 Normative references 3 Terms and definitions 4 Abbreviated terms 5 Overview 6 Variant constructors ..6 6.1 General. .6 6.2 Access to variant constructors 6.3 Encryption of variant constructors .6 7 Variant byte ranges .1 7.1 Overview.. 7.2 Access to variant byte ranges. .7 7.3 Encryption of variant byte range information ..8 8 Sample variants. ..8 8.1 General. .8 8.2 Access to sample variants 8.3 Encryption of sample variants ..8 9 Variant data stream. 9.1 Variant data. ..8 9.1.1 General. ..8 9.1.2 Definition. ..8 9.1.3 Syntax .9 9.1.4 Semantics .9 9.2 Variant constructor list .9 9.2.1 Definition. 9 9.2.2 Syntax.. .9 9.2.3 Semantics .9 9.3 Variant constructor. 10 9.3.1 Syntax .10 9.3.2 Semantics ..10 10 Carriage of variant data stream in ISOBMFF .12 10.1 General .12 10.2 Variant tracks. .12 10.2.1 Definition.. ..12 10.2.2 Association ..12 10.2.3 Variant metadata sample entry ..13 10.3 Variant data. .14 10.3.1 Encryption. ..14 10.3.2 Association .15 11 Carriage of variant data stream in MPEG-2 TS .16 11.1 General. ..16 11.2 Sample variant metadata streams ..16 11.2.1 Definition. .16 11.2.2 Association .17 11.2.3 Metadata descriptor for sample variant metadata stream. .18 11.2.4 Sample variant metadata configuration. ..18 11.2.5 PES Packetization. .19 11.2.6 Encryption. ..19 11.3 Association 20 @ IS0/IEC 2018 - All rights reserved ii