IEC TS 62318-2003 Multimedia systems and equipment - Multimedia home server systems - Home server conceptual model《多媒体系统和设备.多媒体家用服务器系统.家用服务器概念模式》.pdf

1、TECHNICAL SPECIFICATION IECTS 62318 First edition 2003-06 Multimedia systems and equipment Multimedia home server systems Home server conceptual model Reference number IEC/TS 62318:2003(E)Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 ser

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8、TS 62318 First edition 2003-06 Multimedia systems and equipment Multimedia home server systems Home server conceptual model PRICE CODE IEC 2003 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including p

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10、alogue Commission Electrotechnique Internationale International Electrotechnical Commission 2 TS 62318 IEC:2003(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTIMEDIA SYSTEMS AND EQUIPMENT MULTIMEDIA HOME SERVER SYSTEMS HOME SERVER CONCEPTUAL MODEL FOREWORD 1) The IEC (International Electrotechni

11、cal Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this e

12、nd and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organi

13、zations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on tech

14、nical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published i

15、n the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent

16、possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipm

17、ent declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this technical specification may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. The main task of IE

18、C technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publication of a technical specification when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or the s

19、ubject is still under technical development or where, for any other reason, there is the future but no immediate possibility of an agreement on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into I

20、nternational Standards. IEC 62318, which is a technical specification, has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment The text of this technical specification is based on the following documents: Enquiry draft Report on voting 100/575A/DTS 100/679

21、/RVC Full information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.TS 62318 IEC:2003(E) 3 The committee has decided that the conten

22、ts of this publication will remain unchanged until 2006-03-31. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual edition may be issued at a later date. 4 TS 62318 IEC:2003(E) INTRODUCTION Broadcasters, network providers and consumer

23、electronics companies have their own home server models, that are different from each other. In order to start a discussion on standardization of home server technology, a home server conceptual model should be established. The model should include all the server logical elements and the functionali

24、ty, which is required and expected by broadcasters, network providers, consumer electronics companies and users.TS 62318 IEC:2003(E) 5 MULTIMEDIA SYSTEMS AND EQUIPMENT MULTIMEDIA HOME SERVER SYSTEMS HOME SERVER CONCEPTUAL MODEL 1 Scope This Technical Specification describes a home server conceptual

25、model for multimedia home server systems. A home server conceptual model is specified from the standardization point of view to clarify the functionality and modularity of existing and future home servers. The model provides key technology of home servers to be standardized. It should be noted that

26、the modelling is not intended for actual implementation of home servers. The modelling is expected to be a reference for discussing and developing new works of home server standardization, and to contribute to ease of operation and connectivity of home servers. The model is dealt with as an instance

27、 of the equipment structure model defined in IEC 61998. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inclu

28、ding any amendments) applies. IEC 61998:1999, Model and framework for standardization in multimedia equipment and systems 3 Definitions For the purposes of this document, the following definitions apply. 3.1 home server interface between inhouse-networks and external communication environment, inclu

29、ding mandatory high-capacity storage functionality and other optional functionality, as shown in Figure 1 External communication environment Optinal functionality High-capacity storage Home server Inhouse networks IEC 1798/03 Figure 1 Home server 3.2 interchangeable storage media storage media for i

30、nformation interchange between systems 6 TS 62318 IEC:2003(E) 4 Notation A Document Type Definition (DTD) of Extensible Markup Language (XML) is employed to precisely describe a logical structure of modelling. NOTE Extensible Markup Language (XML) is a subset of Standard Generalized Markup Language

31、SGML) amended by its Technical Corrigendum 2. 5 Modelling syntaxTS 62318 IEC:2003(E) 7 6 Modelling semantics 6.1 General The basic elements of a home server are a) head-end, b) inhouse-network-interface, c) interchangeable-storage-media-port, d) user-interface, e) functional-module, f) application-

32、program-interface. A home server must contain at least one head-end element, one inhouse-network-interface element, and the functional-module element(s), which support those interfaces and high- capacity storage functionality. The home server may contain more than one of those elements and other ele

33、ments. Figure 2 shows an example of elements structure in the conceptual model. User-interface Application-prog-interface Head-end Functional module Interchangeable-storage-media-port Inhouse -network -interface High-cap-storage-cont-mod User-int-con-mod Head-end-cont-mod Inhaouse-net-int-cont-mod I

34、ntch-storage-med-port-cont-mod IEC 1799/03 Figure 2 Conceptual model consisting of elements 8 TS 62318 IEC:2003(E) 6.2 Head-end Through a head-end element, a home server has access to an external network for information interchange, for example satellite, terrestrial, cable, powerline, internet, or

35、other networking media. The element supports protocols for corresponding networking media. 6.3 Inhouse-network-interface An inhouse-network-interface element interfaces with inhouse distributed equipment via local- area-network, home-bus, PC-interface, video-interface, or other interfacing media. 6.

36、4 Interchangeable-storage-media-port An interchangeable-storage-media-port element supports a logical functionality of information interchange via interchangeable storage media such as nonsequential-media (for example DVD) and sequential-media (for example Digital Video Tape). 6.5 User-interface Thr

37、ough a user-interface element, all the communication between the home server and its user are carried out and home server operations are controlled by the user. 6.6 Functional module All the functions and operations of head-end, inhouse network interface, interchangeable- storage-media-port and user

38、interface modules are controlled by the corresponding functional modules. In addition there are functional modules that control high-capacity storage, content data and user-assist functionalities: high-capacity storage control module, content control module and user-assist module. There may be othe

39、r functional modules. The content control module may consist of submodules, such as coding, decoding, content- managing, security-managing and content-editing submodules. The other functional modules may also be split up into submodules. 6.7 Application program interface Some application programs ca

40、n be installed into a home server. For feasible portability of the application programs, application program interfaces (APIs) are required. The API contains a module for each functional module. 7 Issues to be standardized Functions and specifications of head-end and inhouse-network-interface elemen

41、ts will not be the issues of home server specific standards. 7.1 Interchangeable storage media port Physical and logical formats of interchangeable storage media have been standardized by the responsible groups and volume/file services are provided by the standards. How to use the volume/file servic

42、es should be standardized from the home server applications point of view. 7.2 User interface Todays home servers for digital television, in particular, have many more functions than conventional home video recorders. Hence, the ever-growing need for clear user interfaces. To avoid user confusion, t

43、here should be some standardization for the user interfaces.TS 62318 IEC:2003(E) 9 7.3 Functional module Functions and their attributes provided by a functional module should be identified by a standardized scheme or naming convention. It needs to be intuitive to be of help when employing or compari

44、ng multiple different home servers (see the listing of functional module in Table A.1). 7.4 Application program interface To achieve interoperability of application programs, the API of each functional module should be standardized. NOTE 1 “Application Program Interface for UDF based File Systems” i

45、s an example standard on this issue. See IEC 62291. NOTE 2 How to standardize API was discussed in JTC1 (see ISO/IEC JTC1 N2319). 7.5 Documentation User manuals, service manuals and other documentation for home servers should be written with standardized names for the functions, their attributes and

46、 attribute values, for example a) name of function; subtitle overwrite; b) attributes/values: character code/euc-jp, position/bottom, typeface/times-new-roman. Such standardization enables users to understand the capabilities of their home server and avoid irregal user operations. 10 TS 62318 IEC:20

47、03(E) Annex A (informative) Functions/specifications of existing equipment Actual functions/specifications in the elements prepared in some existing equipment on the market or to be on the market are shown in Table A.1. Table A.1 Functions/specifications in sample existing equipment Functional modul

48、e/submodule Product Head end Inhouse network interface (High- capacity storage media) coding/ decoding high-capacity storage control content editing user-assist security- managing A - HF/VHF tuner - composite input/output - component output(D1) - i-link - HDD (30GB) - MPEG- ENC(SD) - MPEG- DEC(SD) -

49、 tracking playback - playback during recording - D-VHS automatic copying - visual program navigation - MV/CGMS-A - DTCP B - HF/VHF tuner - BS analog tuner - composite input/output - HDD (30GB) - MPEG- ENC(SD) - MPEG- DEC(SD) - tracking playback - playback during recording - program combine - keyword retrieve - scene retrieve - MV/CGMS-A C - HF/VHF tuner - BS analog tuner - composite input/output - HDD (30GB) - VHS/S- VHS - MP