1、 International Telecommunication Union ITU-T H.760TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2009) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSIPTV multimedia services and applications for IPTV IPTV multimedia application frameworks Overview of multimedia application frameworks for IPTV ser
2、vices Recommendation ITU-T H.760 ITU-T 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 Comm
3、unication procedures H.240H.259 Coding 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 a
4、nd multimedia services H.360H.369 Supplementary 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 collabo
5、ration applications and services H.520H.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
6、 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.7
7、39 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769IPTV service discovery up to consumption H.770H.779 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.760 (03/2009) i Recommendation ITU-T H.760
8、Overview of multimedia application frameworks for IPTV services Summary Recommendation ITU-T H.760 identifies and describes the relevant standards of multimedia application frameworks for interoperability and harmonization in IPTV services. It gives an overview of standards for declarative applicati
9、on frameworks as well as standards for procedural application frameworks. For declarative application frameworks, standards to be used for IPTV are described (such as HTML, CSS, DOM, ECMAScript, SVG, BML, MHEG-5 and Ginga-NCL), while procedural application frameworks are represented by GEM-based fra
10、meworks. It also contains descriptions of ISO/IEC International Standards for application frameworks, namely M3M, BIFS and LASeR. Recommendation ITU-T H.760 also has an annex on common usage of web-related technologies. Source Recommendation ITU-T H.760 was approved on 16 March 2009 by ITU-T Study G
11、roup 16 (2009-2012) under Recommendation ITU-T A.8 procedures. ii Rec. ITU-T H.760 (03/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunicat
12、ion Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (
13、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 approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fal
14、l within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Re
15、commendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language s
16、uch 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 required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recomm
17、endation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of appr
18、oval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB
19、patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.760 (03/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined
20、 elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Standards for declarative application frameworks . 3 5.1 Binary format for scene (BIFS) 3 5.2 Broadcasting markup language (BML) 5 5.3 CEA-2014 . 6 5.4 Cascading style sheet (CSS) . 7 5.5 Document object model
21、 (DOM) . 7 5.6 Digital video broadcasting hypertext markup language (DVB-HTML) 7 5.7 ECMAScript . 8 5.8 Hypertext markup language (HTML) 8 5.9 Lightweight application scene representation (LASeR) and simple aggregation format 9 5.10 MHEG-5 . 10 5.11 Nested context language (NCL) . 10 5.12 Scalable v
22、ector graphics (SVG) . 11 5.13 Worldwide TV markup language (WTVML) 12 6 Standards for procedural application frameworks 12 6.1 GEM based application frameworks 13 7 Other related standards . 15 7.1 MPEG multimedia middleware (M3W) . 15 Annex A Common usage 16 A.1 BML profile 16 A.2 CEA-2014 . 16 A.
23、3 DVB-HTML profile . 16 A.4 SVG profiles . 16 Bibliography. 17 Rec. ITU-T H.760 (03/2009) 1 Recommendation ITU-T H.760 Overview of multimedia application frameworks for IPTV services 1 Scope This Recommendation identifies and describes the relevant standards for interoperability and harmonization am
24、ong IPTV multimedia application frameworks. 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 valid. All Recommendations
25、 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 Recommendations is regularly published
26、. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T J.201 Recommendation ITU-T J.201 (2008), Harmonization of declarative content format for interactive television applications. ITU-T T.170 Recommendation ITU-T T
27、.170 (1998), Framework of the T.170-Series of Recommendations. ITU-T T.172 Recommendation ITU-T T.172 (1998) | ISO/IEC 13522-5:1997, MHEG-5 Support for base-level interactive applications. ITU-T T.175 Recommendation ITU-T T.175 (1998), Application programming interface (API) for MHEG-5. ITU-R BT.169
28、9-1 Recommendation ITU-R BT.1699-1 (2009), Harmonization of declarative application formats for interactive TV. ITU-R BT.1722-1 Recommendation ITU-R BT.1722-1 (2007), Harmonization of the instruction set for the execution engine for interactive TV applications. ANSI/SCTE 90-1 ANSI/SCTE 90-1 (2005),
29、SCTE Application Platform Standard OCAP 1.0 Profile. ARIB STD-B24 ARIB STD-B24 Ver5.3 (2009), Data coding and Transmission Specification for Digital Broadcasting; ARIB, Association of Radio Industries and Businesses (Japan). ATSC A/101A ATSC Document A/101 A (2009), ATSC Standard: Advanced Common Ap
30、plication Platform (ACAP). CEA-2014 CEA-2014 (2006), Web-based Protocol and Framework for Remote User Interface on UPnP Networks and the Internet (Web4CE). ETSI TS 102 322 ETSI TS 102 322 V1.1.1 (2004), Specification for a Lightweight Microbrowser for interactive TV applications, based on and compat
31、ible with WML. ETSI TS 102 812 ETSI TS 102 812 V1.2.2 (2006), Digital Video Broadcasting (DVB) Multimedia Home Platform (MHP) Specification 1.1.1. ETSI TS 102 819 ETSI TS 102 819 V1.4.1 (2008), Digital Video Broadcasting (DVB) Globally Executable MHP version 1.0.3 (GEM 1.0.3). 2 Rec. ITU-T H.760 (03
32、/2009) ISO/IEC 14496-11 ISO/IEC 14496-11 (2005), Information technology Coding of audio-visual objects Part 11: Scene description and application engine. ISO/IEC 14496-20 ISO/IEC 14496-20 (2008), Information technology Coding of audio-visual objects Part 20: Lightweight Application Scene Representat
33、ion (LASeR) and Simple Aggregation Format (SAF). ISO/IEC 16262 ISO/IEC 16262 (2002), Information technology ECMAScript language specification. ISO/IEC 23004.x ISO/IEC 23004.x-series (2007), Information technology Multimedia Middleware. W3C CSS1 Cascading Style Sheets, level 1 (2008), W3C Recommendat
34、ions: Cascading Style Sheets, level 1. W3C DOM1 Document Object Model (DOM) Level 1 Specification Version 1.0 (1998), W3C Recommendation: Document Object Model (DOM) Level 1 Specification. W3C DOM2 Document Object Model (DOM) Level 2 Core Specification Version 1.0 (2000), W3C Recommendation: Documen
35、t Object Model (DOM) Level 2 Core Specification. W3C SVG 1.1 Scalable Vector Graphics (SVG) 1.1 Specification (2003), W3C Recommendation: Scalable Vector Graphics (SVC) 1.1 Specification. W3C XHTML XHTML 1.0 Second Edition (2002), W3C Recommendation: XHTML 1.0, The Extensible HyperText Markup Langua
36、ge (Second Edition). 3 Definitions 3.1 Terms defined elsewhere This clause is intentionally left blank. 3.2 Terms defined in this Recommendation This clause is intentionally left blank. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: ACAP Advanced Comm
37、on Application Platform API Application Programming Interface BD-J Blu-ray Disc Java BIFS BInary Format for Scene BIFS-Anim BIFS Animation BML Broadcast Markup Language CE Consumer Electronics CSS Cascading Style Sheet DASE Digital television Application Software Environment DDE-T Declarative Data E
38、ssence-Transitional Rec. ITU-T H.760 (03/2009) 3 DOM Document Object Model EE Execution Engine FBA Face and Body Animation GEM Globally Executable MHP HDTV High-Definition Digital TeleVision ISDB-T Integrated Services Digital Broadcasting-Terrestrial LASeR Lightweight Application Scene Representatio
39、n M3W MPEG Multimedia Middleware MHEG Multimedia and Hypermedia information coding Experts Group MHP Multimedia Home Platform NCL Nested Context Language OCAP Open Cable Application Platform PE Presentation Engine S making applications written in one dialect of ECMAScript will not necessarily work i
40、n another. ECMAScript is an object-oriented programming language for performing computations and manipulating computational objects within a host environment. It was originally designed to be a web scripting language, providing a mechanism to enliven web pages in browsers and to perform server compu
41、tation as part of a web-based client-server architecture. A web browser provides an ECMAScript host environment for client-side computation including, for example, objects that represent windows, menus, pop-ups, dialog boxes, text areas, anchors, frames, history, cookies, and input/output. Further,
42、the host environment provides a means to attach scripting code to events such as change of focus, page and image loading, unloading, error and abort, selection, form submission, and mouse actions. Scripting code appears within the HTML and the displayed page is a combination of user interface elemen
43、ts and fixed and computed text and images. The scripting code is reactive to user interaction and there is no need for a main program. A web server provides a different host environment for server-side computation including objects representing requests, clients, and files; and mechanisms to lock an
44、d share data. By using browser-side and server-side scripting together, it is possible to distribute computation between the client and server while providing a customized user interface for web-based applications. ECMAScript does not constitute by itself a multimedia framework but is used with some
45、 markup languages such as BML, CEA-2014, DVB-HTML and SVG. 5.8 Hypertext markup language (HTML) HTML (hypertext markup language) is the predominant markup language for web pages. It provides a means to describe the structure of text-based information in a document by denoting certain text as links,
46、headings, paragraphs, lists, and so on and to supplement that text with interactive forms, embedded images, and other objects. HTML is written in the form of tags, surrounded by angle brackets. HTML can also describe, to some degree, the appearance and semantics of a document, and can include embedd
47、ed scripting language code (such as ECMAScript) that can affect the behaviour of web browsers and other HTML processors. Rec. ITU-T H.760 (03/2009) 9 Elements are the basic structure for HTML markup. Elements have two basic properties: attributes and content. Each attribute and each elements content
48、 has certain restrictions that must be followed for an HTML document to be considered valid. An element usually has a start tag (e.g., ) and an end tag (e.g., ). The elements attributes are contained in the start tag and content is located between the tags (e.g., Content ). Some elements, such as ,
49、do not have any content and must not have a closing tag. Listed below are several types of markup elements used in HTML. 5.8.1 HTML and XHTML HTML is also often used to refer to content in specific languages, such as a MIME type text/html, or even more broadly as a generic term for HTML, whether in its XML-descended form (such as XHTML 1.0 W3C XHTML and later) or its form descended directly from SGML (such as HTML 4.01 and earlier). One difference in the latest HTML
