1、 Reference numberISO/IEC 14496-14:2003(E)ISO/IEC 2003Information technology Coding of audio-visual objects Part 14: MP4 file format Technologies de linformation Codage des objets audiovisuels Partie 14: Format de fichier MP4 National Standard of CanadaCAN/CSA-ISO/IEC 14496-14:04(ISO/IEC 14496-14:200
2、3)International Standard ISO/IEC 14496-14:2003 (first edition, 2003-11-15) has been adopted withoutmodification (IDT) as CSA Standard CAN/CSA-ISO/IEC 14496-14:04, which has been approved as a NationalStandard of Canada by the Standards Council of Canada.ISBN 1-55397-745-9 December 2004The Canadian S
3、tandards Association (CSA), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards Council of Canada to the National Standards system in 1973. It is a not-for-profit, nonstatutory, voluntary membership association engaged in standards dev
4、elopment and certification activities. CSA standards reflect a national consensus of producers and users including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by munici
5、pal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment. Individuals, companies, and associations across Canada indicate their support for CSAs standards development by volunteering their time and ski
6、lls to CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSAs total membership from which its Directors are chosen. Sustaining memberships represent a major source of
7、 income for CSAs standards development activities. The Association offers certification and testing services in support of and as an extension to its standards development activities. To ensure the integrity of its certification process, the Association regularly and continually audits and inspects
8、products that bear the CSA Mark. In addition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 1919, the Association has developed the necessary expertise to meet its corp
9、orate mission: CSA is an independent service organization whose mission is to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and international needs.For further infor
10、mation on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaThe Standards Council of Canada is the coordinating body of the National Standards system, a federation of independent, autonomous organizations working towards the further de
11、velopment and improvement of voluntary standardization in the national interest. The principal objects of the Council are to foster and promote voluntary standardization as a means of advancing the national economy, benefiting the health, safety, and welfare of the public, assisting and protecting t
12、he consumer, facilitating domestic and international trade, and furthering international cooperation in the field of standards. A National Standard of Canada is a standard which has been approved by the Standards Council of Canada and one which reflects a reasonable agreement among the views of a nu
13、mber of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of producers, users, consumers, and others with relevant interests, as may be appropriate to the subject in hand. It normally is a standard which is capable of making a signi
14、ficant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a standard conforms to the criteria and procedures established by the Standards Council of Canada. Approval does not refer to the technical content of the standard; this re
15、mains the continuing responsibility of the accredited standards development organization. Those who have a need to apply standards are encouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the lat
16、est edition from the organization preparing the standard.The responsibility for approving National Standards of Canada rests with theStandards Council of Canada270 Albert Street, Suite 200Ottawa, Ontario, K1P 6N7CanadaAlthough the intended primary application of this Standard is stated in its Scope,
17、 it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationICS 35.040 Ref. No. ISO/IEC 14496-14:2003/Cor.1:2006(E) ISO/IEC 2006 All rights reserved INTERNATIONAL STANDARD ISO/IEC
18、 14496-14:2003 TECHNICAL CORRIGENDUM 1 Published 2006-04-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATIONINTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION LECTROTECHNIQUE INTERNATIONALEInformation technology Coding of audio-visual objects Part 14: MP4
19、 file format TECHNICAL CORRIGENDUM 1 Technologies de linformation Codage des objets audiovisuels Partie 14: Format de fichier MP4 RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to ISO/IEC 14496-14:2003 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC
20、 29, Coding of audio, picture, multimedia and hypermedia information. International Organization for Standardization (ISO), 2006. All rights reserved. International Electrotechnical Commission (IEC), 2006. All rights reserved. NOT FOR RESALE.Technical Corrigendum 1:2007 toNational Standard of Canada
21、CAN/CSA-ISO/IEC 14496-14:04Technical Corrigendum 1:2006 to International Standard ISO/IEC 14496-14:2003 has been adopted withoutmodification (IDT) as Technical Corrigendum 1:2007 to CAN/CSA-ISO/IEC 14496-14:04. This TechnicalCorrigendum was reviewed by the CSA Technical Committee on Information Tech
22、nology (TCIT) under thejurisdiction of the Strategic Steering Committee on Information Technology and deemed acceptable for use inCanada.August 2007ISO/IEC 14496-14:2003/Cor.1:2006(E) 2 ISO/IEC 2006 All rights reservedAdd the following Annex B after Annex A: Annex B (informative) Handling of Audio T
23、imestamps and Profile/Level Indication As specified in ISO/IEC 14496-3 (Audio), the decoder produces a compositionUnit as output for every accessUnit it receives as input. An edit-list can be used to indicate the desired audio output (that is, the valid samples) from amongst the set of samples in th
24、e output compositionUnits. For example, an edit list might specify that the system using the decoder discard the first 1 024 audio samples (possibly the result from decoding a pre-roll accessUnit), and also discard some final samples of the decoded waveform (those resulting from rounding up the leng
25、th of the wave-form to an audio frame boundary). This enables exact round trip processing, whereby the output of the decoder has the same length as the input to the encoder, with the audio in the same temporal position. Systems that see only the edit may feel that they are able to discard data not n
26、eeded by the edits. When the analogous situation arises in video (when edits do not fall on random-access points) they are aware of the need to keep data back to the random access point preceding the start of the edit. In this case the file can specify the need for “pre-roll” using a pre-roll sample
27、 group, for example a pre-roll value of 1 (minus one), to indicate to the system using the decoder that it must start the sequence of accessUnits presented to the decoder with the accessUnit immediately prior to the accessUnit whose corresponding compositionBuffer contains the start of the desired a
28、udio. This includes the cases of starting at the beginning of the audio (the start of the edit list), random access, or where the user has performed further editing in the encoded domain. In addition, care should be taken when an audio signal can be decoded in either a backwards-compatible or enhanc
29、ed fashion. As specified in ISO/IEC 14496-3, the timestamp (constructed from the time-to-sample table) applies to the backwards-compatible decoding. If a decoder applies additional delay to the output waveform (i.e. the audio appears later in the audio output waveform than if just backwards-compatib
30、le decoding were performed), then the system using the decoder must be informed of this delay so that it can compensate for it, in order to maintain correct temporal behaviour (including synchronization). If it is desired to label audio streams with their profile and level indications, an ExtensionP
31、rofileLevelDescriptor may be inserted in the ES_Descriptor, as stored in the esds box of the audio stream. This is especially useful in cases where no IOD is present in the file. Technical Corrigendum 1:2007 toCAN/CSA-ISO/IEC 14496-14:04CAN/CSA-ISO/IEC 14496-14:04Information technology Coding of aud
32、io-visualobjects Part 14: MP4 file formatDecember 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 14496-14:04Information technology Coding of audio-visual objects Part 14: MP4 file formatCSA PrefaceStandards development within the Information Technology sector is harmonized with internation
33、al standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for
34、Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the j
35、urisdiction of the Strategic Steering Committee on Information Technology and deemed acceptable for use in Canada. (A committee membership list is available on request from the CSA Project Manager.) From time to time, ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these docum
36、ents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Sales representative. This Standard has been formally approved as a National Standard of Canada by the Standards Council of Canada.December 2004 Canadian Standards As
37、sociation 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Where the words “this International Standard” appear in the text, they should be interpreted as “this N
38、ational Standard of Canada”.Inquiries regarding this National Standard of Canada should be addressed toCanadian Standards Association5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044www.csa.caReference numberISO/IEC 14496-14:2003(E)ISO/IEC 2003INTERNATIONA
39、L STANDARD ISO/IEC14496-14First edition2003-11-15Information technology Coding of audio-visual objects Part 14: MP4 file format Technologies de linformation Codage des objets audiovisuels Partie 14: Format de fichier MP4 ISO/IEC 14496-14:2003(E) PDF disclaimer This PDF file may contain embedded type
40、faces. In accordance with Adobes 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 downloading this file, parties accept therein the responsibility of not infri
41、nging Adobes licensing policy. The ISO Central Secretariat 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 opti
42、mized 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. ISO/IEC 2003 All rights reserved. Unless otherwise specified
43、, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case p
44、ostale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO/IEC 2003 All rights reservedISO/IEC 14496-14:2003(E) ISO/IEC 2003 All rights reserved iiiContents Page Foreword iv Introduction v 0.1 Derivation. v 0.2 Interchange v 0.3 Content Cr
45、eation . v 0.4 Streamed presentation vi 1 Scope 1 2 Normative references . 1 3 Storage of MPEG-4 1 3.1 Elementary Stream Tracks. 1 3.2 Track Identifiers 3 3.3 Synchronization of streams. 4 3.4 Composition 5 3.5 Handling of FlexMux. 5 4 File Identification. 6 5 Additions to the Base Media Format. 6 5
46、.1 Object Descriptor Box 7 5.2 Track Reference Types. 7 5.3 Track Header Box 8 5.4 Handler Reference Types. 8 5.5 MPEG-4 Media Header Boxes 8 5.6 Sample Description Boxes. 8 5.7 Degradation Priority Values. 10 6 Template fields used. 10 Annex A (informative) Patent statements 11 ISO/IEC 14496-14:200
47、3(E) iv ISO/IEC 2003 All rights reservedForeword 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 ISO or IEC participate in the development o
48、f International Standards through 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 and non-governmental, in
49、liaison with ISO and IEC, also take part in the work. In the field of information 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/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint tech
