1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T H.765 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2015) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV IPTV multimedia application frameworks Packaged IPTV applicatio
2、n (widget) service Recommendation ITU-T H.765 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.
3、230H.239 Communication 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
4、audiovisual and multimedia services H.360H.369 Telepresence H.420H.429 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
5、 H.510H.519 Mobile multimedia collaboration 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 collaboratio
6、n inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA 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
7、AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV 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
8、.780H.789 E-HEALTH MULTIMEDIA SERVICES AND APPLICATIONS Interoperability compliance testing of personal health systems (HRN, PAN, LAN, TAN and WAN) H.820H.859 Multimedia e-health data exchange services H.860H.869 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.76
9、5 (04/2015) i Recommendation ITU-T H.765 Packaged IPTV application (widget) service Summary Packaged internet protocol television (IPTV) applications (IPTV widgets) are lightweight applications, provided with a simple and easily accessible graphical user interface (GUI), that commonly provide a sing
10、le functionality (e.g., calendars, feed aggregators, etc.) and might stay persistently exhibited. IPTV widgets may run on different types of IPTV terminal devices and therefore standardized technologies must be supported by the widget engine in the terminal device. Recommendation ITU-T H.765 describ
11、es IPTV widget services that are developed using the technologies defined in the ITU-T H.760 multimedia application framework (MAFR) series, such as nested context language (NCL) (Recommendation ITU-T H.761), LIME (Recommendation ITU-T H.762), HTML (new MAFR ITU-T Recommendation under study), cascad
12、ing style sheets (CSS) (Recommendation ITU-T H.763.1), Services enhanced scripting language (SESL) (Recommendation ITU-T H.764) and Lua (new MAFR ITU-T Recommendation under study). The widget service also takes advantage of functionalities described in the ITU-T H.721 IPTV terminal device basic mode
13、l, as well as service discovery protocols and services specified in Recommendation ITU-T H.770. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.765 2015-04-29 16 11.1002/1000/12464 _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of
14、 your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.765 (04/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and c
15、ommunication 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 Recommendations on them with a view to standardizing telecommunications on a worldwide basis
16、. 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 approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolut
17、ion 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 “Administration“ is used for conciseness to indicate both a telecommunication administration an
18、d 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 compliance with the Recommendation is achieved when all of these mandatory provisions are m
19、et. 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 required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possib
20、ility 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 Intellectual Property Rights, whether asserted by ITU members or others outside of the Re
21、commendation 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. However, implementers are cautioned that this may not represent the latest informat
22、ion and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2015 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.765 (04/2015) iii Table of Contents
23、 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 3 6 Introduction . 3 6.1 IPTV widgets overview 4 7 IPTV widget service . 4 7.1 Widget service end-to-end architecture 5 7.2 IPTV
24、widget service discovery 6 7.3 Protocols for widget service . 7 8 IPTV widget engine 8 9 IPTV widgets 9 8.1 IPTV widget packaging 9 9.2 IPTV widget metadata/configuration . 10 9.3 IPTV widget security 12 Appendix I ITU-T IPTV widgets versus W3C widgets 14 Appendix II IPTV widget examples . 15 II.1 I
25、TU-T H.761 widget example 15 II.2 ITU-T H.762 widget example 17 Rec. ITU-T H.765 (04/2015) 1 Recommendation ITU-T H.765 Packaged IPTV application (widget) service 1 Scope This Recommendation specifies the architecture and functional components needed for the provisioning of packaged IPTV application
26、 (widget) service. Widgets are lightweight applications, provided with a simple and easily accessible GUI, which commonly provide a single functionality (e.g., calendars, feed aggregators, etc.) and might stay persistently exhibited. The widget service definition relies on the interoperability and h
27、armonization provided by IPTV multimedia application frameworks (MAFRs) ITU-T H.760. The scope of the recommendation comprises the definition of the IPTV packaged application model and the definition of essential service components such as service discovery, packaging, metadata and security. The tar
28、get terminal device types range from the basic model as specified in ITU-T H.721 to full-fledged terminal devices, which are defined in ITU-T H.722. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions o
29、f this Recommendation. At the time of publication, the editions indicated were 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
30、other references listed below. A list of the currently valid ITU-T Recommendations 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.721 Recommendation ITU-T H.721 (2015), IPTV terminal
31、devices: Basic model. ITU-T H.722 Recommendation ITU-T H.722 (2014), IPTV terminal devices: Full-fledged 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 (2014), Nested context language (NCL)
32、 and Ginga-NCL. ITU-T H.762 Recommendation ITU-T H.762 (2011), Lightweight interactive multimedia framework 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 lan
33、guage. ITU-T H.770 Recommendation ITU-T H.770 (2015), Mechanisms for service discovery and selection for IPTV services. ITU-T X.509 Recommendation ITU-T X.509 (2012), Information technology Open Systems Interconnection The Directory: Public-key and attribute certificate frameworks. IETF RFC 5246 IET
34、F RFC 5246 (2008), The Transport Layer Security (TLS) Protocol Version 1.2. 2 Rec. ITU-T H.765 (04/2015) IETF RFC 7230 IETF RFC 7230 (2014), Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing. W3C Widgets W3C Recommendation (2012), Packaged Web Apps (Widgets) Packaging and XML Config
35、uration (Second Edition). W3C WidgetsDigSig W3C Recommendation (2013), XML Digital Signatures for Widgets. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 content delivery network (CDN) b-ITU-T F.750: A network optimized for delivering
36、digital content. 3.1.2 content provider b-ITU-T Y.1910: The entity that owns or is licensed to sell content or content assets. 3.1.3 end-user b-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 optionally be a subscriber. 3.1
37、.4 key b-ITU-T X.800: A sequence of symbols that controls the operations of encipherment and decipherment. 3.1.5 IPTV terminal device b-ITU-T Y.1901: A terminal device which has ITF functionality, e.g., a set top box (STB). 3.1.6 metadata b-ITU-T Y.1901: Structured, encoded data that describe charac
38、teristics of information-bearing entities to aid in the identification, discovery, assessment, and management of the described entities. 3.1.7 multimedia b-ITU-T J.148: The combination of multiple forms of media such as audio, video, text, graphics, fax, and telephony in the communication of informa
39、tion. 3.1.8 network provider b-ITU-T Y.1910: The organization that maintains and operates the network components required for IPTV functionality. NOTE 1 A network provider can optionally also act as service provider. NOTE 2 Although considered as two separate entities, the service provider and the n
40、etwork provider can optionally be one organizational entity. 3.1.9 service b-ITU-T Y.1901: A set of functionalities enabled by a provider for end-users. 3.1.10 service provider b-ITU-T M.1400: A general reference to an operator that provides telecommunication services to customers and other users ei
41、ther on a tariff or contract basis. A service provider may or may not operate a network. A service provider may or may not be a customer of another service provider. NOTE In the context of IPTV systems, typically, the service provider acquires or licenses content from content providers and packages
42、this into a service that is consumed by the end-user. 3.1.11 terminal device (TD) b-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 med
43、ia player. 3.1.12 user interface (UI) b-ITU-T F.902: Software and hardware components through which a user can interact with a system. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: Rec. ITU-T H.765 (04/2015) 3 3.2.1 IPTV widget: See packaged IPTV applicati
44、on. 3.2.2 packaged IPTV application: Lightweight application that is intended to be used frequently, such as calendars and news aggregators, with an easily accessible graphical user interface (GUI), often staying on the terminal device display. 3.2.3 widget engine: Software layer that provides featu
45、res so that widgets can run on a certain user platform (i.e., an IPTV terminal device). 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AES Advanced Encryption Standard CSS Cascading Style Sheets EPG Electronic Program Guide GUI Graphical User Interfac
46、e HTTP Hypertext Transfer Protocol HTTPS Hypertext Transfer Protocol Secure IPTV Internet Protocol Television LIME Lightweight Interactive Multimedia Framework MAFR Multimedia Application Framework NCL Nested Context Language RSA Rivest-Shamir-Adleman SESL Services Enhanced Script Language SHA Secur
47、e Hash Algorithm SSL Secure Sockets Layer TLS Transport Layer Security 5 Conventions None. 6 Introduction Widget is the definition used for an interactive element of a GUI that displays an information arrangement. The origin of the term “widget“ comes from the short for “window gadget“, and it was f
48、irst applied to user interface elements on documents from Project Athena in 1988 b-Athena. The term widget is also commonly used to specify an element different from basic GUI components because it provides a single interaction point for the direct manipulation of data in a particular context, but a
49、s visual components, widgets can be combined to form an application, or may be used separately, as individual applications. Interactive buttons, sliders, boxes, menus, and other components may be called widgets b-WidgetsIntro. However, recently the term is more often used to name a lightweight application (e.g., stock market monitor, weather forecast, calculator, news aggregator, etc.) that is usually packaged into a single file to facilitate
