ISO/IEC TECHNICAL REPORT TR 14496-24 First edition 2008-01-15 Information technology Coding of audio-visual objects Part 24: Audio and systems interaction Technologies de I'information - Codage d'objets audiovisuels - Partie 24: Codage audio et interaction de systemes Reference number ISO/IEC TR 14496-24:2008(E) IEC Tso @ISO/IEC2008 py IHS under ted without license from IHS Not for Resale ISO/IEC TR 14496-24:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ ISO/IEC2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO/IEC 2008 - All rights reserved I without license from IHS Not for Resale ISO/IEC TR 14496-24:2008(E) Contents Page Foreword. iv 1 Scope 2 Motivating audio composition time stamp handling.. 3 AAc Encoder/Decoder Behavior.... 3.1 Example 1: AAC ..... 3.1.1 Overview.. 3.1.2 3.1.3 Edit-list.. 3.1.4 Compressed Information and Decoder behavior 3.2 Example 2.: HE-AAC .... 3.2.1 Overview...... 4 Streaming Considerations . Annex A (informative) Relevant ISO Base Media File Format Syntax. A.1 Pre-roll syntax. A.2 Edit-list syntax . Copyright Intematinal orgaizatio fr standadzation All rights reserved ii d by IHS under ed without license from IHS Not for Resale ISO/IEC TR14496-24:2008(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 members of ISOorIECparticipate in thedevelopment ofInternationalStandardsthrough technical committees established by the respective organization to deal with particular fields of technical activity. IsO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. In exceptional circumstances, the joint technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type 3, when the joint technical committee has collected data of a different kind from that which is normally published as an International Standard ("state of the art", for example). Technical Reports of types 1 and 2 are subject to revie