INTERNATIONAL ISO/IEC STANDARD 23001-14 First edition 2019-01 AMENDMENT 1 2021-10 Information technology MPEG systems technologies Part 14: Partial file format AMENDMENT 1: Support for HTTP entities, enhanced file type and byte- range priorities Technologies de I'information - Technologies des systemes MPEG - Partie 14: Format de fichier partiel AMENDEMENT 1: Prise en charge des entites HTTP, du type de fiche amelioré et des priorités des plages d'octets Reference number IS0/IEC 23001-14:2019/Amd. 1:2021(E) IEC 4 @ IS0/IEC 2021 IS0/IEC 23001-14:2019/Amd. 1:2021(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2021 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 orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP401·Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2021 - All rights reserved IS0/IEC 23001-14:2019/Amd. 1:2021(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are membersofIsOorIECparticipateinthedevelopmentofInternationalStandardsthroughtechnical committees established by the respective organization to deal with particular fields of technical activity.IsOandIECtechnicalcommitteescollaborateinfieldsofmutualinterest.Otherinternational organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of document should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs). Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatentrights.IsOandIECshallnotbeheldresponsibleforidentifyinganyorallsuchpatent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISo list of patent declarations received (see www.iso.org/patents) or the IEC list of patent declarations received (see patents.iec.ch). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation of the voluntary nature of standards, the meaning of IsO specific terms and expressions related to conformity assessment, as well as information about Iso's adherence to www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards. This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. A list of all parts in the ISO/IEC 23001 series can be found on the ISO and IEC websites. Any feedback or questions on this document should be directed to the user's national standards body. A complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-committees. @ IS0/IEC 2021 - All rights reserved iii