1、 International Telecommunication Union ITU-T J.206TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2013) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Application for Interactive Digital Television Architecture for an application control fra
2、mework using integrated broadcast and broadband digital television Recommendation ITU-T J.206 Rec. ITU-T J.206 (03/2013) i Recommendation ITU-T J.206 Architecture for an application control framework using integrated broadcast and broadband digital television Summary Consumer electronics devices are
3、 more and more connected every day. This tendency has also reached digital television (DTV) receivers, Blu-ray players, personal video recorder (PVR) devices and even games consoles. Taking advantage of the increasing broadband availability, consumer electronics manufacturers are embedding in their
4、products applications that are able to retrieve content from proprietary services available through the Internet. Additionally, computational capabilities and increasing persistent storage availability in these devices will allow end users to customize their devices by installing new applications; t
5、his is already occurring with mobile phones, tablets and games consoles. In the same way, DTV broadcasters are extending their systems in order to use broadband availability to improve their services by adding interactive non-linear and on-demand content to the services they traditionally offer. How
6、ever, most of the current solutions are closed/proprietary solutions and focused on each industrys specific problems. In alignment with Recommendation ITU-T J.205, Requirements for an application control framework using integrated broadcast and broadband digital television, this contribution propose
7、s a study on the architecture and implementation for an application control framework for DTV enabled devices. This framework would be responsible for managing and controlling the interactive content and applications available through DTV services, installed by the end user or embedded by the device
8、 manufacturer, and providing a unified execution environment for them. History Edition Recommendation Approval Study Group 1.0 ITU-T J.206 2013-03-01 9 ii Rec. ITU-T J.206 (03/2013) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of tele
9、communications, 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 Recommendations on them with a view to standardizing teleco
10、mmunications 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 approval of ITU-T Recommendations is covered by the pr
11、ocedure 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 “Administration“ is used for conciseness to indicate both a te
12、lecommunication 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 compliance with the Recommendation is achieved when all of
13、 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 required of any party. INTELLECTUAL PROPERTY RIGHTS
14、 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 Intellectual Property Rights, whether asserted by ITU m
15、embers 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. However, implementers are cautioned that this may
16、 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 2014 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 J.2
17、06 (03/2013) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 3 4 Abbreviations and acronyms 4 5 Conventions 4 6 Overall architecture 4 6.1 The IBB application structure 5 6.2 Accessibility considerations .
18、6 7 IBB DTV receiver architecture . 6 7.1 High level architecture based on the ITU-T J.200-series of Recommendations 6 8 IBB DTV receiver behaviour 9 8.1 Coexistence and backward compatibility with existing DTV receivers, which adhere to Recommendations ITU-T J.200, b-ITU-T J.201, b-ITU-T H.761 and
19、b-ITU-T J.202 . 10 8.2 System expandability: plug-in support (optional) 10 8.3 Support for delivering IBB applications using any combination of delivery mechanisms 10 8.4 Application life cycle model 14 8.5 IBB application control 15 8.6 The application catalogue user interface (AppCatUI) 16 8.7 IBB
20、 installable application management 18 8.8 Internet application repository 20 8.9 Ensuring DTV service integrity and IBB application permissions policy . 21 8.10 Ensure user privacy and user data protection . 23 8.11 User account management 23 8.12 Location awareness (optional) 25 8.13 DTV service s
21、ynchronization (stream events) . 25 8.14 Media content streaming (optional) 25 8.15 Cryptographic API 25 8.16 Persistent storage 26 Bibliography. 27 Rec. ITU-T J.206 (03/2013) 1 Recommendation ITU-T J.206 Architecture for an application control framework using integrated broadcast and broadband digi
22、tal television 1 Scope This Recommendation defines a high-level architecture for an application control framework based on integrated broadcast and broadband (IBB) digital television (DTV) services intended to harmonize the behaviour and the interaction of a variety of types of applications, provide
23、d by network agnostic delivery mechanisms which include broadcast delivered, broadband delivered, pre-installed, delivered via application repository and home area network delivered. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in
24、this text, constitute provisions of 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 e
25、dition of the Recommendations and 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 J.200 Recommendation
26、ITU-T J.200 (2010), Worldwide common core Application environment for digital interactive television services. ITU-T J.205 Recommendation ITU-T J.205 (2012), Requirements for an application control framework using integrated broadcast and broadband digital television. 3 Definitions 3.1 Terms defined
27、 elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 application ITU-T J.205: Any active DTV service content aimed at end-user interaction. 3.1.2 application catalogue ITU-T J.205: Data structure listing available applications (interactive content). This data structure is
28、 local to the IBB DTV receiver, and describes the IBB applications installed on the IBB DTV receiver. 3.1.3 application catalogue user interface ITU-T J.205: A user interface functionality over the IBB DTV receiver, intended to allow the end user to browse the available applications in the applicati
29、on catalogue or to query application catalogues exposed by application repositories. Also, it lists applications that are currently available in the selected IBB DTV service or broadcast DTV service. 3.1.4 application component ITU-T J.205: A block of data that forms part of an application. Applicat
30、ion component types are: code, resources, metadata, control and user settings. 3.1.5 application control data structure ITU-T J.205: Data structures transmitted within the integrated broadcast and broadband (IBB) DTV service to control IBB applications (e.g., AIT in b-GINGA-J, b-MHP). 3.1.6 applicat
31、ion installation package ITU-T J.205: Application delivery mechanism in which several application components are bundled together in a single file. 2 Rec. ITU-T J.206 (03/2013) 3.1.7 application repository ITU-T J.205: Entity, reachable through the broadband channel, that provides access to integrat
32、ed broadcast and broadband (IBB) applications contained in it. These IBB applications can be downloaded and installed on the IBB DTV receiver, manually, by the end user, or, in case of being signalled within an IBB DTV service, launched or installed automatically under the IBB DTV services control u
33、sing the IBB application control mechanism. An application repository can be managed by IBB service providers, IBB DTV receiver manufacturers, or other third party entities. 3.1.8 bridge elements ITU-T J.200: A mechanism for applications that allows bidirectional mapping between execution engine and
34、 presentation engine. 3.1.9 broadband channel ITU-T J.205: A medium used to deliver interactive content. Usually this medium is based on the Internet and allows the delivery of non-linear and on-demand content. A broadband channel allows access to servers that may be located in the Internet. 3.1.10
35、broadcast channel ITU-T J.205: A medium used to deliver digital television (DTV) services. Examples: free to air, satellite and cable. 3.1.11 broadcast DTV service ITU-T J.205: Any digital television (DTV) service, delivered through a broadcast channel. 3.1.12 cable IBB DTV service ITU-T J.205: An i
36、ntegrated broadcast and broadband digital television (DTV) service managed by cable operators. 3.1.13 DTV service ITU-T J.205: This is the unit for delivering audio-visual content to the end users. In a more extensive definition (the one adopted in this Recommendation), this unit also comprehends th
37、e delivery of interactive content. It constitutes an editorially consistent whole and it is an aggregation of different kinds of service components. 3.1.14 DTV service component delivery mechanism ITU-T J.205: Used to refer to any mechanism, channel or medium to deliver digital television (DTV) serv
38、ice components to an integrated broadcast and broadband (IBB) DTV receiver. 3.1.15 DTV service content ITU-T J.205: Audio/visual/interactive components delivered within a digital television (DTV) service as single editorially consistent whole. 3.1.16 execution engine ITU-T J.200: A subsystem in a re
39、ceiver that evaluates and executes procedural applications consisting of computer language instructions and associated data and media content. An execution engine may be implemented with an operating system, computer language compilers, interpreters and application programming interfaces (APIs), whi
40、ch a procedural application may use to present audiovisual content, interact with a user, or execute other tasks that are not evident to the user. A common example of an execution engine is the JavaTV software environment, using the Java programming language and byte code interpreter, JavaTV APIs, a
41、nd a Java virtual machine for program execution. 3.1.17 IBB application ITU-T J.205: An application that is meant to be handled and executed within an integrated broadcast and broadband (IBB) application control framework defined by this Recommendation. Such applications can have their application c
42、ontents delivered using different application component delivery mechanisms. 3.1.18 IBB application control mechanism ITU-T J.205: A mechanism used by integrated broadcast and broadband (IBB) digital television (DTV) service providers to signal and control IBB applications associated to their respec
43、tive IBB DTV services. The mechanism contemplates the transmission of an IBB DTV services application control data structure within the IBB DTV service. Such data structure can support the signalling of IBB applications that are retrievable from the broadcast channel or through the broadband channel
44、 from HTTP servers or application repositories. Rec. ITU-T J.206 (03/2013) 3 3.1.19 IBB DTV receiver ITU-T J.205: A device capable of receiving and displaying DTV services as well as integrated broadcast and broadband (IBB) DTV services. 3.1.20 IBB DTV service ITU-T J.205: A service that simultaneou
45、sly provides an integrated experience of broadcasting and interactivity relating to media content, data and applications from multiple sources, where the interactivity is sometimes associated with broadcasting programmes. 3.1.21 IBB DTV service provider ITU-T J.205: An entity (i.e., broadcasters) ma
46、king available and delivering IBB DTV services. 3.1.22 IBB installable application ITU-T J.205: An integrated broadcast and broadband (IBB) application that can be downloaded and saved onto the IBB DTV receivers persistent storage for later usage. 3.1.23 IBB resident application ITU-T J.205: An inte
47、grated broadcast and broadband (IBB) application embedded into the IBB DTV receiver by the device manufacturer. 3.1.24 presentation engine ITU-T J.200: A subsystem in a receiver that evaluates and presents declarative applications consisting of content, such as audio, video, graphics, and text, prim
48、arily based on presentation rules defined in the presentation engine. A presentation engine also responds to formatting information, or “markup“, associated with the content, to user inputs, and to script statements, which control presentation behaviour and initiate other processes in response to us
49、er input and other events. A common example of a presentation engine is an HTML browser, capable of displaying text and graphic content formatted in HTML b-W3C HTML, with interactive behaviour programmed in ECMAScript b-ECMAScript. 3.1.25 remote application catalogue ITU-T J.205: application catalogue exported from an application repository. This differs from the normal application catalogue in that, if the remote application catalogue is very large, there must be a mechanism for querying it and
