1、 International Telecommunication Union ITU-T J.205TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2012) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Application for Interactive Digital Television Requirements for an application control fra
2、mework using integrated broadcast and broadband digital television Recommendation ITU-T J.205 Rec. ITU-T J.205 (01/2012) i Recommendation ITU-T J.205 Requirements for an application control framework using integrated broadcast and broadband digital television Summary Consumer electronic devices get
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. Consumer electronics manufacturers are taking advantage of the increasing broadband availability and embedding their p
4、roducts with applications that are able to retrieve content from proprietary services available through the Internet. Additionally, increased storage capacity and improved computational capabilities of these devices would allow the end users to customize their devices by installing new applications,
5、 as currently being done with mobile phones or games consoles. Similarly, DTV broadcasters are extending their systems to make the most of increased broadband availability to improve their services by adding interactive non-linear and on-demand content to what they already offer. However, most of th
6、e current solutions are closed / proprietary, and they are focused on each industry specific problems. Recommendation ITU-T J.205 proposes the requirements that should be met by an application control framework for DTV-enabled devices, which is responsible for managing and controlling the interactiv
7、e content and applications available through cable DTV services that have been installed by the end-user or embedded by the device manufacturer, and providing network agnostic delivery mechanisms and a unified execution environment for them. History Edition Recommendation Approval Study Group 1.0 IT
8、U-T J.205 2012-01-13 9 ii Rec. ITU-T J.205 (01/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a
9、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 (WTSA), which meets every four years, est
10、ablishes 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 fall within ITU-Ts purview, the necessary s
11、tandards 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 Recommendation is voluntary. However, the
12、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 such as “must“ and the negative equivale
13、nts 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 Recommendation may involve the use of a claim
14、ed 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 approval of this Recommendation, ITU had no
15、t 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 patent database at http:/www.itu.int/IT
16、U-T/ipr/. ITU 2012 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.205 (01/2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined
17、 in this Recommendation . 1 4 Abbreviations and acronyms 3 5 Conventions 4 6 Motivation 4 7 Integrated broadcast and broadband system analysis . 4 7.1 DTV services and IBB DTV services 4 7.2 Interactive content (applications) . 5 7.3 Delivery of application components . 6 7.4 Service associated IBB
18、applications and stand-alone IBB applications 6 7.5 Service exclusive and service shared IBB applications . 6 8 Functional requirements for IBB DTV application control framework (ACF) 7 Bibliography. 20 Rec. ITU-T J.205 (01/2012) 1 Recommendation ITU-T J.205 Requirements for an application control f
19、ramework using integrated broadcast and broadband digital television 1 Scope This Recommendation defines high-level requirements for an application control framework based on integrated broadcast and broadband (IBB) DTV services where broadcasters or cable operators are continually engaged with thei
20、r network. This application control framework is intended to harmonize the behaviour and the interaction of a variety of types of applications, provided by network agnostic delivery mechanisms, including applications that are broadcast-delivered, broadband-delivered, pre-installed, installed via an
21、application repository, or home area network delivered. This Recommendation is intended to define a baseline for such an integrated application framework. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provis
22、ions 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 edition of the Recommendation
23、s 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 ITU-T J.200 (2010), Worldwid
24、e common core Application environment for digital interactive television services. 3 Definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 application: Any active DTV service content aimed at end-user interaction
25、. 3.2.2 application catalogue: Data structure listing available applications (interactive content). This data structure is local to the IBB DTV receiver, and describes the IBB applications installed on the IBB DTV receiver. 3.2.3 application catalogue user interface: A user interface functionality o
26、ver the IBB DTV receiver, intended to allow the end user to browse the available applications in the application 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
27、 service. 3.2.4 application component: A block of data that forms part of an application. Application component types are: code, resources, meta-data, control and user settings. 3.2.5 application component delivery mechanism: A mechanism, channel or medium used to deliver application components to a
28、n IBB DTV receiver. 2 Rec. ITU-T J.205 (01/2012) 3.2.6 application control data structure: Data structures transmitted within the integrated broadcast and broadband (IBB) DTV service to control IBB applications (e.g., AIT in b-GINGA, b-MHP). 3.2.7 application install package: Application delivery me
29、chanism in which several application components are bundled together in a single file. 3.2.8 application repository: Entity, reachable through the broadband channel, that provides access to integrated broadcast and broadband (IBB) applications contained in it. These IBB applications can be downloade
30、d 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 using the IBB application control mechanism. An application repository can be managed by IBB service pr
31、oviders, IBB DTV receiver manufacturers, or other third party entities. 3.2.9 authorized IBB application provider: An entity allowed to develop and provide integrated broadcast and broadband (IBB) applications within a given implementation of an IBB digital television (DTV) system. 3.2.10 broadband
32、channel: 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. 3.2.11 broadcast channel: A medium used to deliver digita
33、l television (DTV) services. Examples: free to air, satellite and cable. 3.2.12 broadcast DTV service: Any digital television (DTV) service, delivered through a broadcast channel. 3.2.13 cable integrated broadcast and broadband DTV service: An integrated broadcast and broadband digital television (D
34、TV) service managed by cable operators. 3.2.14 DTV service: 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 the delivery of interactive content. It constitutes an editorially co
35、nsistent whole and it is an aggregation of different kinds of service components. 3.2.15 DTV service component: Each one of the audio, visual or interactive elements that compose a digital television (DTV) service. 3.2.16 DTV service component delivery mechanism: Used to refer to any mechanism, chan
36、nel or medium to deliver digital television (DTV) service components to an integrated broadcast and broadband (IBB) DTV receiver. 3.2.17 DTV service content: Audio/visual/interactive components delivered within a digital television (DTV) service as single editorially consistent whole. 3.2.18 IBB app
37、lication: 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 contents delivered using different application component delivery mechanisms
38、. 3.2.19 IBB application control mechanism: A mechanism used by integrated broadcast and broadband (IBB) digital television (DTV) service providers to signal and control IBB applications associated to their respective IBB DTV services. The mechanism contemplates the transmission of an IBB DTV servic
39、es 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 from HTTP servers or application repositories. Rec. ITU-T J.205 (01/2012) 3 3.2.20 IBB
40、 DTV receiver: A device capable of receiving and displaying DTV Services as well as integrated broadcast and broadband (IBB) DTV services. 3.2.21 IBB DTV service provider: An entity (i.e., broadcasters) making available and delivering IBB DTV services. 3.2.22 IBB installable application: An integrat
41、ed broadcast and broadband (IBB) application that can be downloaded and saved onto the IBB DTV receivers persistent storage for later usage. 3.2.23 IBB resident application: An integrated broadcast and broadband (IBB) application embedded into the IBB DTV receiver by the device manufacturer. 3.2.24
42、integrated broadcast and broadband (IBB) DTV service: A service that simultaneously 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
43、. 3.2.25 remote application catalogue: 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 retrieving it in small parts that can be
44、handled in an efficient way by the integrated broadcast and broadband (IBB) DTV receiver. 3.2.26 service associated IBB application: An application that is part of the integrated broadcast and broadband (IBB) DTV service tuned by the user at a given time. 3.2.27 service exclusive IBB application: An
45、 application that is listed as a component of an integrated broadcast and broadband (IBB) DTV service and its life cycle is strictly tied to the exhibition of such an IBB DTV service. 3.2.28 service shared IBB application: An application that is listed as a component of several different integrated
46、broadcast and broadband (IBB) DTV services. Its life cycle is for as long as any of those IBB DTV services are being exhibited. 3.2.29 stand-alone IBB application: Resident or downloaded integrated broadcast and broadband (IBB) installable application that is not part of an IBB DTV service. Such an
47、application can be created by an authorized IBB application provider, and typically delivered through the application repository. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: ACF Application Control Framework AIP Application Install Package AIT Appl
48、ication Information Table DAV Distributed Authoring and Versioning DSMCC DC Digital Storage Media Command and Control Data Carousel DSMCC OC Digital Storage Media Command and Control Object Carousel DTV Digital Television EPG Electronic Programme Guide HAN Home Area Network HTTP Hyper Text Transfer
49、Protocol HTTPS Secure Hyper Text Transfer Protocol 4 Rec. ITU-T J.205 (01/2012) IBB Integrated Broadcast and Broadband NFS Network File System PVR Personal Video Recorder RTP Real Time Protocol RTSP Real Time Streaming Protocol UI User Interface URL Universal Resource Locator 5 Conventions None. 6 Motivation With the increasing availability of broadband Internet access services, both consumer electronics manufacturers and DTV service providers have started taking advantage of this trend of providing connected devices and Internet services. The broadban
