1、Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard.Date of ANSI Approval: 12/24/2003Published by American National Standards Institute,25 West 43rd Street, New York, New York 10036Copyright 2003 by Information Technology Industry Council
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3、his publication may be reproduced in any form, including an electronic retrieval system, withoutthe prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaReference numberISO
4、/IEC 15938-6:2003(E)ISO/IEC 2003INTERNATIONAL STANDARD ISO/IEC15938-6First edition2003-07-01Information technology Multimedia content description interface Part 6: Reference software Technologies de linformation Interface de description du contenu multimdia Partie 6: Logiciel de rfrence ISO/IEC 1593
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8、elow. ISO/IEC 2003 All rights reserved. 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
9、 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2003 All rights reservedISO/IEC 15938-6:2003(E) ISO/IEC 2003 All rights reserved iiiC
10、ontents Page Foreword iv Introduction v 1 Scope 1 2 Symbols and abbreviated terms 1 3 Copyright disclaimer for software modules.2 4 XM software architecture . 2 4.1 Block diagrams . 2 5 Systems reference software (BiM) 12 5.1 BiM reference software. 12 5.2 Access unit navigator. 14 6 Systems referen
11、ce software (DDL) . 16 7 Video reference software . 16 8 Audio reference software. 17 9 Multimedia description scheme reference software . 18 10 Compilation of the reference software . 20 11 Usage information for individual descriptors and description schemes 20 Annex A (informative) Providers of re
12、ference software . 21 Annex B (informative) Integration and interface templates . 22 Annex C (informative) Patent statements 23 ISO/IEC 15938-6:2003(E) iv ISO/IEC 2003 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Com
13、mission) form the specialized system for worldwide standardization. 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. I
14、SO and IEC technical committees collaborate in fields of mutual 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, I
15、SO/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 technical committee are circulated to natio
16、nal bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. ISO/IEC 15938-6 was prepared by Technical Committee ISO/IEC/TC JTC1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermed
17、ia information. ISO/IEC 15938 consists of the following parts, under 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 softwa
18、re Part 7: Conformance testing Part 8: Extraction and use of MPEG-7 descriptions ISO/IEC 15938-6:2003(E) ISO/IEC 2003 All rights reserved vIntroduction This International Standard, also known as “Multimedia Content Description Interface”, provides a standardized set of technologies for describing mu
19、ltimedia content. International Standard addresses a broad spectrum of multimedia applications and requirements by providing a metadata system for describing the features of multimedia content. The following are specified in this International Standard: Description schemes (DS) describe entities or
20、relationships pertaining to multimedia content. Description Schemes specify 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 ba
21、sic reusable datatypes employed by Description Schemes and Descriptors. Systems tools support delivery of descriptions, multiplexing of descriptions with multimedia content, synchronization, file format, and so forth. This International Standard is subdivided into eight parts: Part 1 Systems: specif
22、ies 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 defining the standard set of description tools (DSs, Ds, and datat
23、ypes) 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: specifies the generic description tools pertaining to multimedi
24、a 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 standard. Part 8 Extraction and use of MPEG-7 descriptions: provi
25、des guidelines and examples of the extraction and use of descriptions. This part of ISO/IEC 15938 contains simulation software for tools defined in parts 1, 2, 3, 4 and 5 of ISO/IEC 15938. This software has been derived from the verification models used in the process of developing the International
26、 Standard. Where multimedia content extraction or multimedia content description software is provided, attention is called to the fact that these software modules are provided for the purpose of creating bit streams of descriptors and description schemes with normative syntax. The performance of the
27、se software tools should not be taken as indicative of that which can be obtained from implementations where quality and computational optimization are given priority. The techniques used for extracting descriptors or deriving description schemes are not specified by this document. This information
28、can be found in the corresponding sections of part 1-5. INTERNATIONAL STANDARD ISO/IEC 15938-6:2003(E) ISO/IEC 2003 All rights reserved 1Information technology Multimedia content description interface Part 6: Reference software 1 Scope This International Standard operates on and generates conformant
29、 bit streams. This International Standard provides a specific implementation that behaves in a conformant manner. In general, other implementations that conform to ISO/IEC 15938 are possible that do not necessarily use the algorithms or the programming techniques of the reference software. The softw
30、are contained in this part of ISO/IEC 15938 is known as experimentation software (XM) and is divided into five categories: a) Binary format for MPEG-7 (BiM). This software converts DDL (XML) based descriptions to the Binary format of MPEG-7 and vice versa as explained in Clause 5 of this document. b
31、) DDL parser and DDL validation parser. The components of this software module are specified in Clause 6 of this document. c) Visual descriptors. This software creates standard visual descriptions from associated (visual) media content as explained in Clause 7 of this document. The techniques used f
32、or extracting descriptors are informative, and the quality and complexity of these extraction tools has not been optimized. d) Audio descriptors. This software creates standard descriptions from associated (audio) media content as explained in Clause 8 of this document. The techniques used for extra
33、cting descriptors are informative, and the quality and complexity of these extraction tools has not been optimized. e) Multimedia description schemes. This software modules provide standard descriptions of Multimedia Description Schemes as specified in Clause 9 of this document. 2 Symbols and abbrev
34、iated terms For the purposes of this part of ISO/IEC 15938, the following symbols and abbreviated terms apply: AV: Audio-visual CS: Coding Scheme D: Descriptor Ds: Descriptors DCT: Discrete Cosine Transform DDL: Description Definition Language ISO/IEC 15938-6:2003(E) 2 ISO/IEC 2003 All rights reserv
35、edDS: Description Scheme DSs: Description Schemes ISO: International Organization for Standardization MDS: Multimedia Description Schemes MPEG: Moving Picture Experts Group MPEG-7: Multimedia Content Description Interface Standard (see ISO/IEC 15938) XML: Extensible Markup Language 3 Copyright discl
36、aimer for software modules Each source code module in this specification contains copyright disclaimer which shall not be removed from the source code module. In the text of each copyright disclaimer, is replaced with a reference to its associated specification, e.g. MPEG-7 System (ISO/IEC 15938-1),
37、 MPEG-7 Video (ISO/IEC 15938-3), MPEG-7 Audio (ISO/IEC 15938-4), MPEG-7 Multimedia Description Scheme (ISO/IEC 15938-5). “This software module was originally developed by () and edited by (), (), in the course of development of the . This software module is an implementation of a part of one or more
38、 tools as specified by the . ISO/IEC gives users of the free license to this software module or modifications thereof for use in hardware or software products claiming conformance to the . Those intending to use this software module in hardware or software products are advised that its use may infri
39、nge existing patents. The original developer of this software module and his/her company, the subsequent editors and their companies, and ISO/IEC have no liability for use of this software module or modifications thereof in an implementation. Copyright is not released for non conforming products. CN
40、1 retains full right to use the code for his/her own purpose, assign or donate the code to a third party and to inhibit third parties from using the code for non conforming products. This copyright notice must be included in all copies or derivative works. Copyright 200_”. =First Name, =Last Name, =
41、Company Name 4 XM software architecture 4.1 Block diagrams In this section you will find some information about the XM software architecture. The block diagrams give short overviews, and introduce individual components of the XM software. The section also provides a list of the directory location fo
42、r each module. The composing elements of the MPEG-7 Reference Software are characterized by their functionality and by their interfaces. They can be configured according to what here is referred as “Key Applications”. We can distinguish from the functional point of view: “Extraction Applications” (a
43、 description data base is built from a media data base) “Search and Retrieval Applications” (a description is compared with the descriptions in a database to find the one with the lowest distance) “Transcoding Applications” (a media data base is converted into another media data base basing on its d
44、escription) ISO/IEC 15938-6:2003(E) ISO/IEC 2003 All rights reserved 3Extraction ApplicationMediaDatabaseMediaDataDescriptionDatabaseDescriptor/DescriptionschemesCodingSchemeAV DecoderExtractionToolMPEG-7 Reference Software MPEG-7 normative PartNOTE In the block diagram, boxes represent procedural p
45、arts, circles represent data structures. Figure 1 Schematic diagram of an “Extraction Application” using the XM reference software modules Search public: / Null constructor DummyTypeExtractionTool(); / Also connects the Descriptor (result memnory) to the extraction / If set to “0“ it automatically c
46、reates the descriptor DummyTypeExtractionTool(DummyTypeDescriptorInterfaceABC *DummyType); / ID of object type virtual const UUID / Object type name virtual const char *GetName(void); / This informs the extractor where the source data comes from virtual int SetSourceMedia(MultiMediaInterfaceABC* med
47、ia); / Pointer where the description is stored virtual DummyTypeDescriptorInterfaceABC* GetDescriptorInterface(void); virtual int SetDescriptorInterface(DummyTypeDescriptorInterfaceABC *aDummyTypeDescriptorInterface); / initililaize descriptor and extraction process (input media must be known) virtu
48、al unsigned long InitExtracting(void); / performs extraction form input media frame by input media frame virtual unsigned long StartExtracting(void); / collects descriptor data after all input media frames were processed virtual unsigned long PostExtracting(void); / Extraction object must no be used
49、, only its interface is allowd to / to be used. This function is to get the interface virtual DummyTypeExtractionInterfaceABC *GetInterface(void); / access is allowed only by class factories for this / object. This avoids having to duplicate the / ID definition in multiple locations. In the future, we may / have to do this. PLEASE DO NOT USE THESE UNLESS YOU ARE / IMPLEMENTING A CLASS FACTORY GENERATING THIS OBJECT ISO/IEC 15938-6:2003(E) 6 ISO/IEC 2003 All rights
