BSISO/IEC23001-8:2016 BSl Standards Publication Information technology - MPEG systems technologies Part 8: Coding-independent code points bsi. BSISO/IEC23001-8:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO/IEC 23001-8:2016. It supersedes BS ISO/EC 23001-8:2013 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee IST/37,Coding of picture,audio,multimedia and hypermedia information. Alist of organizations represented onthis committeecan be obtainedonrequestto its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSIStandards Limited 2016 ISBN9780580916328 ICS 35.040 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2016. Amendments issued sincepublication Date Text affected BS ISO/IEC 23001-8:2016 INTERNATIONAL ISO/IEC STANDARD 23001-8 Second edition 2016-05-01 Information technology MPEG systems technologies Part 8: Coding-independent code points Technologies de I'information-Technologies dessystemesMPEG- Partie8:Pointsdecodeindépendants du codage Referencenumber IS0/IEC23001-8:2016(E) IEC IS0/IEC2016 BSISO/IEC23001-8:2016 IS0/IEC23001-8:2016(E) COPYRIGHTPROTECTEDDOCUMENT ISo/IEC 2016,Published in Switzerland All rights reserved. Unless otherwise specified, 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 writtenpermission.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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0/IEC 2016 - All rights reserved BSISO/IEC23001-8:2016 IS0/IEC23001-8:2016(E) Contents Page Foreword iv Scope 1 1 2 Normative references 1 3 Terms, definitions and abbreviated terms 1 3.1 Terms and definitions 1 3.2 Abbreviatedterms 2 4 Conventions .2 4.1 Arithmeticoperators 2 4.2 Relational operators .3 4.3 Bit-wise operators.. 3 4.4 Mathematical functions .4 5 Introduction .4 5.1 General 4 5.2 Background 5 5.3 Applicability 6 6 Principles for definition and referencing of codepoints 6 6.1 Codepoint encodingand defaults 6 6.2 Externallydefinedvalues. 7 6.3 Reference format. 7 6.4 URNFormat. 7 Video code points. .7 7 7.1 Colour primaries 7 7.2 Transfer characteristics 9 7.3 Matrix coefficients. 11 7.4 Videoframepackingtype 16 7.5 Packedvideocontentinterpretation 20 7.6 Sample aspect ratio indicator.. 21 Audio code points. .22 8 8.1 Loudspeaker indexand speakerchannel position 22 8.2 Loudspeaker layout index and channel configuration .25 8.3 Loudspeakerpositioning 30 8.4 Programloudness level 33 8.5 Anchorloudness level 34 8.6 Rangeof loudness. 34 8.7 Top of loudness range. .34 8.8 Maximumofmomentaryloudnesslevel .34 .35 8.9 Maximum ofshort-term loudness level 8.10 Short-term loudnesslevel 35 Peak level .35 8.11 Compressorcharacteristic .35 8.12 Bibliography .38 @IS0/IEC 2016 - All rights reserved iii BSISO/IEC23001-8:2016 IS0/IEC23001-8:2016(E) Foreword ISo(theInternational Organizationfor Standardization)andIEC(theInternational Electrotechnical Commission) form the specialized system for worldwide standardization.National bodies that are members ofIso orIEC participate inthedevelopmentof International Standards throughtechnical committees establishedby the respective organizationtodeal with particular fields of technical activity.IsO and IEC technical committees collaborate in fieldsof mutual interest.Other international organizations,governmentalandnon-governmental,inliaison withIsOandIEC,