1、 International Telecommunication Union ITU-T H.720TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (10/2008) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSIPTV multimedia services and applications for IPTV IPTV terminal devices Overview of IPTV terminal devices and end systems Recommendation ITU-T H.72
2、0 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 Communication procedures H.240H.259
3、 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 and multimedia services H.360H.3
4、69 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 collaboration applications and service
5、s 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.559Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVA
6、NCED 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.739 IPTV application event handli
7、ng H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.720 (10/2008) i Recommendation ITU-T H.720 Overview of IPTV terminal devic
8、es and end systems Summary Recommendation ITU-T H.720 gives an overview of the architecture and functional components of an Internet Protocol television (IPTV) terminal device and provides a high-level description of the functionality necessary to support IPTV services. This Recommendation provides
9、the definitions of terminal device and end system, the location of terminal devices and end systems within the overall architecture of IPTV, examples of IPTV services, an abstract description of the terminal device architecture, and descriptions of other Recommendations that discuss IPTV terminal de
10、vices. Source Recommendation ITU-T H.720 was approved on 14 October 2008 by ITU-T Study Group 16 (2005-2008) under Recommendation ITU-T A.8 procedure. ii Rec. ITU-T H.720 (10/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telec
11、ommunications, 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 telecom
12、munications 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 pro
13、cedure 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 tel
14、ecommunication 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 t
15、hese 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 I
16、TU 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 mem
17、bers 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 n
18、ot represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2009 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.720
19、 (10/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation. 4 4 Abbreviations and acronyms 4 5 Introduction 6 5.1 IPTV domains. 6 5.2 IPTV architectural overview 6 5.3 IPTV terminal device and its functional component
20、s 6 6 Services and key features of IPTV terminal device and end system 8 6.1 Examples of services 8 6.2 Key features of IPTV terminal devices 13 7 IPTV terminal device functional architecture. 15 7.1 IPTV terminal transport functions 15 7.2 Content delivery client functions 16 7.3 Media client funct
21、ions 16 7.4 Service and content protection (SCP) client functions. 17 7.5 Application client functions . 18 7.6 Connection and session management. 18 7.7 Terminal device management. 19 7.8 Performance monitoring. 19 8 IPTV terminal device interfaces . 19 8.1 BC (Broadcast)-TD interface . 20 8.2 Netw
22、ork terminal device (NW-TD) interface 20 8.3 TD-HN interface. 20 8.4 TD-OD and TD-PD interfaces 20 8.5 TD-SM interface. 20 9 IPTV terminal software architecture 21 9.1 Resource abstraction layer (RAL) 21 9.2 Service logic adaptation layer 21 9.3 Presentation engine layer 22 9.4 User experience and a
23、pplication layer 22 iv Rec. ITU-T H.720 (10/2008) Page Appendix I Recommendations for IPTV terminal devices. 23 I.1 Enablement of current terminal devices for the support of IPTV services 23 I.2 Draft Recommendation “IPTV terminal devices for basic services“ . 23 I.3 Draft Recommendation “IPTV termi
24、nal device full-fledged model“. 23 I.4 Draft Recommendation “IPTV terminal device mobile model“ 23 Bibliography. 24 Rec. ITU-T H.720 (10/2008) 1 Recommendation ITU-T H.720 Overview of IPTV terminal devices and end systems 1 Scope This Recommendation gives an overview of Internet Protocol television
25、(IPTV) terminal devices and end systems. It also describes the general architecture and functional components of an IPTV terminal device, providing a high-level description of functionality of terminal devices for IPTV services. It provides the definitions of terminal device and end system, the loca
26、tion of terminal devices and end systems within the overall architecture of IPTV, examples of IPTV services, an abstract description of the terminal device architecture, and descriptions of other Recommendations that discuss IPTV terminal devices. 2 References The following ITU-T Recommendations and
27、 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 and other references are subject to revision; users of this Recommendation are therefore encour
28、aged 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. The reference to a document within this Recommendation does not give it, as a stand-alone docu
29、ment, the status of a Recommendation. ITU-T F.703 Recommendation ITU-T F.703 (2000), Multimedia conversational services. ITU-T F.790 Recommendation ITU-T F.790 (2007), Telecommunications accessibility guidelines for older persons and persons with disabilities. ITU-T F.902 Recommendation ITU-T F.902
30、(1995), Interactive services design guidelines. ITU-T G.1080 Recommendation ITU-T G.1080 (2008), Quality of experience requirements for IPTV services. ITU-T G.1081 Recommendation ITU-T G.1081 (2008), Performance monitoring points for IPTV. ITU-T H.622.1 Recommendation ITU-T H.622.1 (2008), Architect
31、ure and functional requirements for home networks supporting IPTV services. ITU-T H.750 Recommendation ITU-T H.750 (2008), High-level specification of metadata for IPTV services. ITU-T J.702 Recommendation ITU-T J.702 (2008), Enablement of current terminal devices for the support of IPTV services. I
32、TU-T M.1400 Recommendation ITU-T M.1400 (2006), Designations for interconnections among operators networks. 2 Rec. ITU-T H.720 (10/2008) ITU-T Q.1290 Recommendation ITU-T Q.1290 (1998), Glossary of terms used in the definition of intelligent networks. ITU-T Y.1910 Recommendation ITU-T Y.1910 (2008),
33、 IPTV functional architecture. ITU-T Y.2014 Recommendation ITU-T Y.2014 (2008), Network attachment control functions in next generation networks. ITU-R BT.2052 Report ITU-R BT.2052 (2005), Protection of end-users privacy in interactive broadcasting systems. ETSI TS 102 822-1 ETSI TS 102 822-1 V1.3.1
34、 (2006), Broadcast and On-line Services: Search, select, and rightful use of content on personal storage systems (“TV-Anytime“); Part 1: Benchmark Features. ETSI TS 102 822-2 ETSI TS 102 822-2 V1.4.1 (2007), Broadcast and On-line Services: Search, select and rightful use of content on personal stora
35、ge systems (“TV-Anytime“); Part 2: Phase 1 System description. ETSI TS 102 822-9 ETSI TS 102 822-9 V1.2.1 (2007), Broadcast and On-line Services: Search, select and rightful use of content on personal storage systems (“TV-Anytime“); Part 9: Phase 2 Remote Programming. ATIS-0800002 ATIS standard ATIS
36、-0800002 (2006), IPTV Architecture Requirements. 3 Definitions 3.1 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
37、.2 content provider ITU-T Y.1910: The entity that owns or is licensed to sell content or content assets. 3.1.3 content tracing b-ITU-T Y.1901: A process to enable the identification of the (arbitrary) origin of content, and/or the responsible party (e.g., the end-user), to facilitate subsequent inve
38、stigation in the event of unauthorized content copying or distribution. NOTE Content tracing information may be attached to content either as metadata, or as a forensic watermark. 3.1.4 delivery ITU-T Y.1910: In context of IPTV architecture, “delivery“ is defined as sending contents to the end-user.
39、 3.1.5 delivery network gateway (DNG) ATIS-0800002: A device implementing the DNGF. 3.1.6 delivery network gateway functions (DNGF) ITU-T H.622.1: Set of functions that mediate between the network and service provider domains and the IPTV terminal function (ITF). NOTE A device implementing the DNGF
40、is commonly referred to as the residential gateway (RG) or delivery network gateway (DNG). Rec. ITU-T H.720 (10/2008) 3 3.1.7 distribution ITU-T Y.1910: In context of IPTV architecture, “distribution“ is defined as sending the content to appropriate intermediate locations to enable subsequent delive
41、ry. 3.1.8 end-user ITU-T Y.1910: The actual user of the products or services. NOTE The end-user consumes the product or service. An end-user can optionally be a subscriber. 3.1.9 functional architecture b-ITU-T Y.2012: A set of functional entities and the reference points between them used to descri
42、be the structure of an NGN. These functional entities are separated by reference points, and thus, they define the distribution of functions. NOTE 1 The functional entities can be used to describe a set of reference configurations. These reference configurations identify which reference points are v
43、isible at the boundaries of equipment implementations and between administrative domains. NOTE 2 This definition is taken from b-ITU-T Y.2012 and therefore relates to NGN. However, it is also valid for other networks, e.g., networks supporting IPTV terminal devices. 3.1.10 functional entity b-ITU-T
44、Y.2012: An entity that comprises an indivisible set of specific functions. Functional entities are logical concepts, while groupings of functional entities are used to describe practical, physical implementations. 3.1.11 home network (HN) ITU-T H.622: Home network is the collection of elements that
45、process, manage, transport, and store information, thus enabling the connection and integration of multiple computing, control, monitoring, communication and entertainment devices in the home. 3.1.12 hybrid terminal device b-ITU-T Y.1901: An IPTV terminal device that can also receive content from di
46、fferent types of transmission systems (e.g., terrestrial, satellite). 3.1.13 IPTV terminal device b-ITU-T Y.1901: A terminal device which has ITF functionality, e.g., STB. 3.1.14 IPTV terminal function (ITF) b-ITU-T Y.1901: The end-user function(s) associated with a) receiving and responding to netw
47、ork control channel messages regarding session set-up, maintenance, and tear-down, and b) receiving the content of an IP transport from the network and rendering. 3.1.15 linear TV b-ITU-T Y.1901: A television service in which a continuous stream flows in real time from the service provider to the te
48、rminal device and where the user cannot control the temporal order in which contents are viewed. 3.1.16 network personal video recorder (nPVR) b-ITU-T Y.1901: Same as PVR except that the recording device is located at the service provider premises. 3.1.17 personal video recorder (PVR) b-ITU-T Y.1901
49、: An end-user controlled device that records, stores and plays back multimedia content. PVR is also known as personal digital recorder (PDR). 3.1.18 service provider ITU-T M.1400: A general reference to an operator that provides telecommunication services to customers and other users either on a tariff or contract basis. A service provider may or may not operate a network. A service provider may or may be a customer of another service provider. NOTE Typically,
