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1、 Reference number ISO/IEC 15938-1:2002(E) ISO/IEC 2002 INTERNATIONAL STANDARD ISO/IEC 15938-1 First edition 2002-07-01 Information technology Multimedia content description interface Part 1: Systems Technologies de linformation Interface de description du contenu multimdia Partie 1: Systmes Copyrigh
2、t International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 15938-1:2002(E) PDF disclaimer This PDF f
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5、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. ISO/IEC 2002 All rights reserve
6、d. Unless otherwise specified, 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
7、. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO/IEC 2002 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licen
8、see=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 15938-1:2002(E) ISO/IEC 2002 All rights reserved iii Contents Page Foreword.iv Introduction.v 1 Scope1 2 Normative references2 3 Terms
9、 and definitions .3 3.1 Conventions.3 3.2 Definitions 6 4 Symbols and abbreviated terms 10 4.1 Abbreviations.10 4.2 Mathematical operators 10 4.3 Mnemonics.12 5 System architecture 14 5.1 Terminal architecture14 5.2 General characteristics of the decoder.14 5.3 Sequence of events during decoder init
10、ialisation .15 5.4 Decoder behaviour16 5.5 Issues in encoding descriptions16 5.6 Differences between the TeM and BiM18 5.7 Characteristics of the delivery layer19 6 Textual Format - TeM.21 6.1 Overview.21 6.2 Textual DecoderInit .21 6.3 Textual Access Unit.22 6.4 Textual Fragment Update Unit .23 6.5
11、 Textual Fragment Update Command.23 6.6 Textual Fragment Update Context.24 6.7 Textual Fragment Update Payload.25 7 Binary format - BiM27 7.1 Overview.27 7.2 Binary DecoderInit.27 7.3 Binary Access Unit30 7.4 Binary Fragment Update Unit.30 7.5 Binary Fragment Update Command32 7.6 Binary Fragment Upd
12、ate Context 33 8 Binary Fragment Update Payload49 8.1 Overview.49 8.2 Definitions 49 8.3 Fragment Update Payload syntax and semantics50 8.4 Element syntax and semantics 51 8.5 Element Content decoding process60 Annex A (informative) Informative examples.78 Annex B (informative) FUContextType definit
13、ion based on W3C XPath specification81 Annex C (informative) Patent statements.83 Bibliography85 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction
14、 or networking permitted without license from IHS -,-,- ISO/IEC 15938-1:2002(E) iv ISO/IEC 2002 All rights reserved Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. Nat
15、ional 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 mutual interes
16、t. 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 accordance with th
17、e rules given in the ISO/IEC Directives, Part 3. 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 require
18、s approval by at least 75 % of the national bodies casting a vote. ISO/IEC 15938-1 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 15938 consists of the following parts, unde
19、r the general title Information technology Multimedia content description interface: Part 1: Systems Part 2: Description definition language Part 3: Visual Part 4: Audio Part 5: Multimedia description schemes Part 6: Reference software Part 7: Conformance testing Part 8: Extraction and use of MPEG-7
20、 descriptions Annexes A to C of this part of ISO/IEC 15938 are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction or networki
21、ng permitted without license from IHS -,-,- ISO/IEC 15938-1:2002(E) ISO/IEC 2002 All rights reserved v Introduction This standard, also known as “Multimedia Content Description Interface,“ provides a standardized set of technologies for describing multimedia content. The standard addresses a broad s
22、pectrum of multimedia applications and requirements by providing a metadata system for describing the features of multimedia content. The following are specified in this standard: Description Schemes (DS) describe entities or relationships pertaining to multimedia content. Description Schemes specif
23、y the structure and semantics of their components, which may be Description Schemes, Descriptors, or datatypes. Descriptors (D) describe features, attributes, or groups of attributes of multimedia content. Datatypes are the basic reusable datatypes employed by Description Schemes and Descriptors. De
24、scription Definition Language (DDL) defines Description Schemes, Descriptors, and Datatypes by specifying their syntax, and allows their extension. Systems tools support delivery of descriptions, multiplexing of descriptions with multimedia content, synchronization, file format, and so forth. This s
25、tandard is subdivided into eight parts: Part 1 Systems: specifies the tools for preparing descriptions for efficient transport and storage, compressing descriptions, and allowing synchronization between content and descriptions. Part 2 Description definition language: specifies the language for defi
26、ning the standard set of description tools (DSs, Ds, and datatypes) and for defining new description tools. Part 3 Visual: specifies the description tools pertaining to visual content. Part 4 Audio: specifies the description tools pertaining to audio content. Part 5 Multimedia description schemes: s
27、pecifies the generic description tools pertaining to multimedia including audio and visual content. Part 6 Reference software: provides a software implementation of the standard. Part 7 Conformance testing: specifies the guidelines and procedures for testing conformance of implementations of the sta
28、ndard. Part 8 Extraction and use of MPEG-7 descriptions: provides guidelines and examples of the extraction and use of descriptions. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04
29、/02/2007 23:15:43 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction or n
30、etworking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 15938-1:2002(E) ISO/IEC 2002 All rights reserved 1 Information technology Multimedia content description interface Part 1: Systems 1 Scope This International Standard defines a Multimedia Content Description Interface,
31、 specifying a series of interfaces from system to application level to allow disparate systems to interchange information about multimedia content. It describes the architecture for systems, a language for extensions and specific applications, description tools in the audio and visual domains, as we
32、ll as tools that are not specific to audio-visual domains. This part of ISO/IEC 15938 specifies system level functionalities for the communication of multimedia content descriptions. ISO/IEC 15938-1 provides a specification which will: enable development of ISO/IEC 15938 receiving sub-systems, calle
33、d ISO/IEC 15938 Terminal, or Terminal in short, to receive and assemble possibly partitioned and compressed multimedia content descriptions provide rules for the preparation of multimedia content descriptions consisting of the tools specified in Parts 3, 4 and 5 of ISO/IEC 15938 for efficient transp
34、ort and storage. The decoding process within the ISO/IEC 15938 Terminal is normative. The rules mentioned provide guidance for the preparation and encoding of multimedia content descriptions without leading to a unique encoded representation of such descriptions. This part of the MPEG-7 Standard is
35、intended to be implemented in conjunction with other parts of the standard. In particular, MPEG-7 Part 1: Systems assumes some knowledge of Part 2: Description Definition Language (DDL) in its normative syntactic definitions of Descriptors and Description Schemes, as well as in the processing of sch
36、ema and descriptions. The methods for obtaining the descriptions to which the encoding techniques in this part refer are defined in Parts 3, 4, and 5 of ISO/IEC 15938. MPEG-7 is an extensible standard. The standard method of extending the standard beyond the Description Schemes provided in the stand
37、ard is to define new ones in the DDL, and to make those DSs as accessible as the instantiated descriptions. Further details are available in Part 2. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie No
38、t for Resale, 04/02/2007 23:15:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 15938-1:2002(E) 2 ISO/IEC 2002 All rights reserved 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisi
39、ons of this part of ISO/IEC 15938. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO/IEC 15938 are encouraged to investigate the possibility of applying the most recent editions of the nor
40、mative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau maintains a list of currently valid ITU-T Rec
41、ommendations. ISO/IEC 10646-1:2000, Information technology Universal Multiple-Octet Coded Character Set (UCS) Part 1: Architecture and Basic Multilingual Plane NOTE The UTF-8 encoding scheme is described in Annex D of ISO/IEC 10646-1:2000. XML, Extensible Markup Language (XML) 1.0, 6 October 2000 XM
42、L Schema, W3C Recommendation, 2 May 2001 XML Schema Part 0: Primer, W3C Recommendation, 2 May 2001 XML Schema Part 1: Structures, W3C Recommendation, 2 May 2001 XML Schema Part 2: Datatypes, W3C Recommendation, 2 May 2001 XPath, XML Path Language, W3C Recommendation, 16 November 1999 Namespaces in X
43、ML, W3C Recommendation, 14 January 1999 NOTE These documents are maintained by the W3C (http:/www.w3.org). RFC 2396, Uniform Resource Identifiers (URI): Generic Syntax. IEEE Standard for Binary Floating-Point Arithmetic, Std 754-1985 Reaffirmed1990, http:/standards.ieee.org/reading/ieee/std_public/d
44、escription/busarch/754-1985_desc.html Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 23:15:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO
45、/IEC 15938-1:2002(E) ISO/IEC 2002 All rights reserved 3 3 Terms and definitions 3.1 Conventions 3.1.1 Naming convention In order to specify data types, Descriptors and Description Schemes, this part of ISO/IEC 15938 uses constructs specified in ISO/IEC 15938-2, such as “element“, “attribute“, “simpl
46、eType“ and “complexType“. The names associated with these constructs are created on the basis of the following conventions: If the name is composed of various words, the first letter of each word is capitalized. The rule for the capitalization of the first word depends on the type of construct and i
47、s described below. Element naming: the first letter of the first word is capitalized (e.g. TimePoint element of TimeType). Attribute naming: the first letter of the first word is not capitalized (e.g. timeUnit attribute of IncrDurationType). complexType naming: the first letter of the first word is
48、capitalized, the suffix “Type“ is used at the end of the name. simpleType naming: the first letter of the first word is not capitalized, the suffix “Type“ may be used at the end of the name. 3.1.2 Documentation convention 3.1.2.1 Textual syntax The syntax of each XML schema item is specified using the constructs specified in ISO/IEC 15938-2. It is depicted in this document using a specific font and ba