ITU-T H 730-2012 Web-based terminal middleware for IPTV services (Study Group 16)《网络电视(IPTV)业务的网络终端中间设备 16号研究组》.pdf

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1、 International Telecommunication Union ITU-T H.730TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2012) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSIPTV multimedia services and applications for IPTV IPTV middleware Web-based terminal middleware for IPTV services Recommendation ITU-T H.730 ITU-T

2、H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H.259 Coding

3、of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.360H.369 Suppl

4、ementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications and services H.520H

5、.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MU

6、LTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Things H.640H.649 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H

7、.720H.729 IPTV middleware H.730H.739IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 Digital Signage H.780H.789 For further details, please refer to the list of ITU-T Recommendati

8、ons. Rec. ITU-T H.730 (06/2012) i Recommendation ITU-T H.730 Web-based terminal middleware for IPTV services Summary Web-based terminal middleware (WBTM) defines the functional interfaces for high-level resource management over an IPTV terminal device and describes the structure of a web-based prese

9、ntation engine, which basically supports IPTV multimedia application frameworks in the ITU-T H.76x series of Recommendations. Web-based IPTV terminal middleware is based on ITU-T IPTV functional architecture and ITU-T terminal devices in the H.72x series of Recommendations. ITU-T web-based IPTV term

10、inal middleware is necessary to support basic and advanced interactive IPTV services for IPTV terminal devices. This Recommendation also describes the general WBTM requirements for IPTV services and any additional functionality for basic and advanced IPTV services. Annex A summarizes the general req

11、uirements. History Edition Recommendation Approval Study Group 1.0 ITU-T H.730 2012-06-29 16 Keywords IPTV services, IPTV terminal device, presentation engine, user agent, web-based terminal middleware. ii Rec. ITU-T H.730 (06/2012) FOREWORD The International Telecommunication Union (ITU) is the Uni

12、ted Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen

13、dations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The app

14、roval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administra

15、tion“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and complia

16、nce with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is

17、required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Inte

18、llectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation

19、. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without

20、the prior written permission of ITU. Rec. ITU-T H.730 (06/2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 3 5 Conventions 4 6 Introduction 4 6.1 Application and middlewa

21、re in IPTV architecture . 4 6.2 Terminal middleware 5 6.3 WBTM architectural overview . 6 7 Interfaces. 7 7.1 IPTV terminal transport functions interfaces . 7 7.2 Content delivery client functions interface . 7 7.3 Media client functions interfaces 8 7.4 SCP client functions interfaces . 9 7.5 Appli

22、cation client functions interface 9 7.6 Connection and session management interface 9 7.7 Terminal device management interface 10 7.8 Performance monitoring interface 10 8 Web-based engine structure 10 8.1 Markup language 10 8.2 Document access interface . 10 8.3 Document style . 10 8.4 Scripting la

23、nguage 10 8.5 Extension engine 11 9 WBTM for IPTV services 11 9.1 WBTM for basic IPTV services . 11 9.2 WBTM for advanced IPTV services 12 Annex A General requirements for IPTV WBTM 14 Appendix I IPTV service model with WBTM 16 I.1 Use case: General IPTV service . 16 I.2 Use case: Enhanced IPTV serv

24、ice (IPTV community portal service) . 16 Appendix II Audience measurement architecture in web-based terminal middleware 17 Appendix III Examples of script and plugin operation modes in WBTM 19 III.1 Relationship between application and IPTV terminal middleware 19 III.2 Relationship between WBTM and

25、WBTM plugin . 21 iv Rec. ITU-T H.730 (06/2012) Page Appendix IV Examples of WBTM overall workflow with the ITU-T H.76x series of Recommendations 23 IV.1 Use case 1: Service display workflow 23 IV.2 Use case 2: User interactive working flow with media management 24 Appendix V An implementation exampl

26、e for WBTM with interface description language 26 V.1 Use case 1: WBTM interface list 26 V.2 Use case 2: Media client functions interfaces for WBTM . 27 Appendix VI An example of the interface description language for WBTM APIs 29 VI.1 Interfaces 29 VI.2 Web-based engine structure . 39 Bibliography.

27、 43 Rec. ITU-T H.730 (06/2012) 1 Recommendation ITU-T H.730 Web-based terminal middleware for IPTV services 1 Scope The purpose of web-based terminal middleware is to define a web-based presentation engine and the functional interfaces for high-level resource management over an IPTV terminal device

28、ITU-T Y.1901. This Recommendation defines web-based terminal middleware, its general architecture and interfaces as required by IPTV services. This Recommendation is based on the ITU-T H.72x series of Recommendations for the specifications of IPTV terminal devices and the ITU-T H.76x series of Recom

29、mendations for multimedia interactivity and web-related technologies. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were

30、valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendati

31、ons is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T H.720 Recommendation ITU-T H.720 (2008), Overview of IPTV terminal devices and end systems. ITU-T H.721 Recommendation ITU-T H.721 (20

32、09), IPTV terminal devices: Basic model. ITU-T H.760 Recommendation ITU-T H.760 (2009), Overview of multimedia application frameworks for IPTV services. ITU-T H.761 Recommendation ITU-T H.761 v2 (2011), Nested context language (NCL) and Ginga-NCL. ITU-T H.762 Recommendation ITU-T H.762 (2011), Light

33、weight interactive multimedia environment for IPTV services. ITU-T H.763.1 Recommendation ITU-T H.763.1 (2010), Cascading style sheets for IPTV services. ITU-T H.764 Recommendation ITU-T H.764 (2012), IPTV services enhanced script language. ITU-T J.200 Recommendation ITU-T J.200 (2010), Worldwide co

34、mmon core Application environment for digital interactive television services. ITU-T Y.1901 Recommendation ITU-T Y.1901 (2009), Requirements for the support of IPTV services. ITU-T Y.1910 Recommendation ITU-T Y.1910 (2008), IPTV functional architecture. 2 Rec. ITU-T H.730 (06/2012) 3 Definitions 3.1

35、 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 application b-ITU-T Y.101: A structured set of capabilities which provide value-added functionality supported by one or more services. 3.1.2 application programming interface (API) b-ITU-T Y.110: This is a

36、n implementation interface between equipment and a software module and which does not have any physical realization as it is internal to the equipment. 3.1.3 end user ITU-T Y.1910: The actual user of the products or services. NOTE An end user consumes the product or service. An end user can optional

37、ly be a subscriber. 3.1.4 IPTV terminal device ITU-T Y.1901: A terminal device which has ITF functionality, e.g., an STB. 3.1.5 IPTV terminal function (ITF) ITU-T Y.1901: An end user function associated with: a) receiving and responding to network control channel messages regarding session set-up, m

38、aintenance and tear-down; b) receiving the content of an IP transport from the network and rendering. 3.1.6 linear TV ITU-T Y.1901: A television service in which a continuous stream flows in real time from the service provider to the terminal device and where the user cannot control the temporal ord

39、er in which content is viewed. 3.1.7 metadata ITU-T Y.1901: Structured, encoded data that describe characteristics of information-bearing entities to aid in the identification, discovery, assessment and management of the described entities. 3.1.8 middleware b-ITU-T Y.101: The mediating entity betwee

40、n two information elements. Such an element can be, for example, an application, an infrastructure component, or another mediating entity. 3.1.9 plug-in ITU-T J.200: A set of functionalities which can be added to a generic platform in order to provide additional functionality. 3.1.10 terminal device

41、 (TD) ITU-T Y.1901: An end-user device which typically presents and/or processes the content, such as a personal computer, a computer peripheral, a mobile device, a TV set, a monitor, a VoIP terminal or an audio-visual media player. 3.1.11 user agent b-W3C WebArch: One type of web agent; a piece of

42、software acting on behalf of a person. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 script: A script is a program written in a scripting program language. Script is often interpreted from the source code. For example, a program written in ECMAscript

43、 is a script. On web-based terminal middleware for IPTV services, scripts are used in order to enable various services in IPTV terminal devices. 3.2.2 scripting program language: A scripting program language is a programming language that allows control of one or more software applications. 3.2.3 WB

44、TM plugin: A WBTM plugin is software that may be added to generic web-based terminal middleware in order to provide additional functionality. WBTM plugins may be resident or be downloaded from the server side. The additional functionality provided by WBTM plugins can Rec. ITU-T H.730 (06/2012) 3 be

45、used by WBTM scripts. A WBTM plugin may be portable for service components, for a resource abstraction layer, for resources, or for none of these. 3.2.4 WBTM plugin API: These APIs are defined by the WBTM to call WBTM plugins to extend the functionalities and abilities provided by WBTM. 3.2.5 WBTM s

46、cript: A script that is run on web-based terminal middleware in an IPTV terminal device and that enables one or more IPTV services, or a part of an IPTV service. The engine for WBTM scripts is recommended in the multimedia application framework series of Recommendations (ITU-T H.76x series). WBTM sc

47、ripts may include lines to call additional functions that are implemented by WBTM plugins. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AM Audience Measurement API Application Programming Interface CAS Conditional Access System CSS Cascading Style S

48、heet DHCP Dynamic Host Configuration Protocol DOM Document Object Model DRM Digital Rights Management EPG Electronic Programme Guide HTML Hypertext Markup Language IDL Interface Description Language IGMP Internet Group Management Protocol LIME Lightweight Interactive Multimedia Environment MAFR Mult

49、imedia Application Framework MLD Multicast Listener Discovery protocol NCL Nested Context Language OS Operating System PIP Picture In Picture PVR Personal Video Recorder RAL Resource Abstraction Layer RSS RDF Site Summary RTP Real-time Transport Protocol SADS Service and Application Discovery and Selection SCP Service and Content Protection SI Service Information SNF Service Navigation Function SP Service Provider STB Set-Top Box 4 Rec. ITU-T H.730 (06/2012) TD Termina