BS-ISO-IEC-14496-14-2003.pdf
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1、BRITISH STANDARD BS ISO/IEC 14496-14:2003 Information technology Coding of audio-visual objects Part 14: MP4 file format ICS 35.040 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14496-14:2003 This British Standard was publishe
2、d under the authority of the Standards Policy and Strategy Committee on 10 February 2004 BSI 10 February 2004 ISBN 0 580 43390 0 National foreword This British Standard reproduces verbatim ISO/IEC 14496-14:2003 and implements it as the UK national standard. The UK participation in its preparation wa
3、s entrusted to Technical Committee IST/37, Coding of audio, picture, multimedia and hypermedia information, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement inter
4、national publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to inclu
5、de all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquir
6、ies on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO/IEC page, pages ii to vi, pages 1 to 1
7、1 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number I
8、SO/IEC 14496-14:2003(E) INTERNATIONAL STANDARD ISO/IEC 14496-14 First edition 2003-11-15 Information technology Coding of audio-visual objects Part 14: MP4 file format Technologies de linformation Codage des objets audiovisuels Partie 14: Format de fichier MP4 BS ISO/IEC 1449614:2003 Licensed Copy:
9、sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DPlcsid Fremia ii BS ISO/IEC 1449614:2003 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Forewordiv Introduction v 0.1 Derivation.
10、v 0.2 Interchangev 0.3 Content Creation.v 0.4 Streamed presentationvi 1 Scope1 2 Normative references .1 3 Storage of MPEG-41 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
11、 Base Media Format.6 5.1 Object Descriptor Box7 5.2 Track Reference Types.7 5.3 Track Header Box8 5.4 Handler Reference Types.8 5.5 MPEG-4 Media Header Boxes8 5.6 Sample Description Boxes.8 5.7 Degradation Priority Values.10 6 Template fields used.10 Annex A (informative) Patent statements 11 BS ISO
12、/IEC 1449614:2003 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standard
13、ization. National bodies that are members of ISO or IEC participate in the development of 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 mu
14、tual interest. Other international organizations, governmental and non-governmental, in 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 accord
15、ance 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 technical committee are circulated to national bodies for voting. Publication as an International Stan
16、dard requires approval by at least 75 % of the national bodies casting a vote. ISO/IEC 14496-14 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. ISO/IEC 14496 consists of the followin
17、g parts, under the general title Information technology Coding of audio-visual objects: Part 1: Systems Part 2: Visual Part 3: Audio Part 4: Conformance testing Part 5: Reference software Part 6: Delivery Multimedia Integration Framework (DMIF) Part 7: Optimized reference software for coding of audi
18、o-visual objects Part 8: Carriage of ISO/IEC 14496 contents over IP networks Part 9: Reference hardware description Part 10: Advanced Video Coding (AVC) Part 11: Scene description and application engine Part 12: ISO base media file format Part 13: Intellectual Property Management and Protection (IPM
19、P) extensions Part 14: MP4 file format Part 15: Advanced Video Coding (AVC) file format Part 16: Animation Framework eXtension (AFX) BS ISO/IEC 1449614:2003 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI v Introduction 0.1 Derivation This s
20、pecification defines MP4 as an instance of the ISO Media File format ISO/IEC 14496-12 and ISO/IEC 15444-12. The general nature of the ISO Media File format is fully exercised by MP4. MPEG-4 presentations can be highly dynamic, and there is an infrastructure the Object Descriptor Framework , which se
21、rves to manage the objects and streams in a presentation. An Initial Object Descriptor serves as the starting point for this framework. In the usage modes documented in the ISO Media File, an Initial Object Descriptor would normally be present, as shown in the following diagrams. 0.2 Interchange The
22、 following diagram gives an example of a simple interchange file, containing two streams. IOD moov mp4 file mdat trak (BIFS) trak (OD) trak (video) trak (audio) other boxes Interleaved, time-ordered, BIFS, OD, video, and audio access units Figure 1 Simple interchange file 0.3 Content Creation In the
23、 following diagram, a set of files being used in the process of content creation is shown. BS ISO/IEC 1449614:2003 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 04:20:24 GMT+00:00 2006, Uncontrolled Copy, (c) BSI vi with other unused data media file mp4 file BIFS access units possibly unord
24、ered with other unused data Video and audio access units possibly unordered mdat IOD moov mp4 file trak (BIFS) trak (OD) trak (video) trak (audio) other boxes other boxes (inc. moov) Figure 2 Content Creation File 0.4 Streamed presentation The following diagram shows a presentation prepared for stre
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