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.721 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2015) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV IPTV terminal devices IPTV terminal devices: Basic model Recomm
2、endation ITU-T H.721 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 pr
3、ocedures 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 and multimedi
4、a 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 H.510H.519 Mobile multim
5、edia 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 collaboration inter-working procedure
6、s 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 AND APPLICATIONS FOR IPTV
7、 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.780H.789 E-HEALTH MULTIM
8、EDIA 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.721 (04/2015) i Recommendat
9、ion ITU-T H.721 IPTV terminal devices: Basic model Summary Recommendation ITU-T H.721 describes and specifies the functionalities of the Internet protocol television (IPTV) terminal devices for the IPTV basic services defined in Recommendation ITU-T H.720. This Recommendation is targeted at IPTV ter
10、minal devices capable of receiving linear television (TV) service and video-on-demand services, with additional data content (such as text) using a managed content delivery network. The service definition takes into consideration conditions on content delivery such as quality of service (QoS). The e
11、xpected types of IPTV terminal devices are set-top boxes and digital TV sets with embedded IPTV capabilities. This edition introduces support for high efficiency video coding (HEVC), dynamic adaptive streaming over HTTP (DASH), MPEG-4 audio lossless coding (ALS), MPEG-4 advanced audio coding (AAC),
12、DTS-HD, timed text markup language (TTML), MPEG media transport (MMT) and several corrections and clarifications. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.721 2009-03-16 16 11.1002/1000/9713 1.1 ITU-T H.721 (2009) Amd.1 2010-07-30 16 11.1002/1000/10999 2.0 ITU-T H.7
13、21 2015-04-29 16 11.1002/1000/12458 _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of 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.721 (04/2015) FOREWORD The Internatio
14、nal 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 permanent organ of ITU. ITU-T is responsible for studying technical, operati
15、ng 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, establishes the topics for study by the ITU-T study groups which, in turn, prod
16、uce 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 standards are prepared on a collaborative basis with ISO and IEC. NOTE In thi
17、s 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 Recommendation may contain certain mandatory provisions (to ensure, e.g., in
18、teroperability 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 equivalents are used to express requirements. The use of such words does not suggest
19、 that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU 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
20、, 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 received notice of intellectual property, protected by patents, which may be re
21、quired 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/ITU-T/ipr/. ITU 2015 All rights reserved. No part of this publication may be reprod
22、uced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.721 (04/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 3 3.1 Terms defined elsewhere 3 3.2 Terms defined in this Recommendation . 5 4 Abbreviations and acronyms 6 5 Conventions 9 6 I
23、ntroduction . 9 7 Services and key features of an IPTV basic model terminal device . 9 7.1 Services of an IPTV TD-Basic model 9 7.2 Features of IPTV TD-Basic model . 12 8 IPTV terminal device functional architecture . 15 9 Functional components of a basic model IPTV terminal device 16 9.1 Terminal t
24、ransport functions 16 9.2 Content delivery client functions 17 9.3 Media client functions 18 9.4 SCP client functions . 25 9.5 Application client functions . 26 9.6 Control client functions 27 9.7 Terminal device management . 27 10 Physical interface 27 10.1 Input interface . 27 10.2 Output interfac
25、e 27 Appendix I Clock synchronization and jitter removal 28 I.1 Overview 28 I.2 Timestamped TS (TTS) clock reconstruction 28 I.3 IETF RFC 2250-based mechanism (DVB) 29 I.4 IETF RFC 2250-based mechanism (ATIS) 29 Appendix II Terminal device implementation example . 30 II.1 IPTV terminal device functi
26、onal overview 30 II.2 Summary of IPTV TD-Basic model functions . 36 II.3 Network settings . 38 II.4 Initial setting overview . 39 II.5 Initial settings . 39 II.6 Portal selection . 41 II.7 Function to clear user configuration information . 41 II.8 Playback of VoD content 41 iv Rec. ITU-T H.721 (04/2
27、015) Page II.9 Electronic content guide . 45 II.10 Parental control settings . 49 II.11 Residence location configuration . 50 II.12 Terminal preset information . 50 II.13 Basic registration information management . 50 II.14 SCP client identification . 51 II.15 MAFR user agent requirements for IPTV 5
28、1 II.16 Remote controller . 52 Appendix III Examples for the lossless high quality audio service 53 III.1 Examples for the lossless high quality audio service . 53 Appendix IV Examples for the bandwidth of digital broadcasting 56 Bibliography. 58 Rec. ITU-T H.721 (04/2015) 1 Recommendation ITU-T H.7
29、21 IPTV terminal devices: Basic model 1 Scope This Recommendation describes and specifies the functionalities of the Internet protocol television (IPTV) terminal devices for IPTV basic services defined in ITU-T H.720 over a dedicated content delivery network, which takes into consideration condition
30、s on content delivery such as quality of service (QoS). The expected types of terminal devices are set-top boxes (STBs) and digital television (TV) sets with embedded IPTV capabilities. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference
31、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 encouraged to investigate the possibility of applying the most recen
32、t 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 document, the status of a Recommendation. ITU-T H.222.0 Recommenda
33、tion ITU-T H.222.0 (2014) | ISO/IEC 13818-1:2015, Information technology Generic coding of moving pictures and associated audio information: Systems. ITU-T H.262 Recommendation ITU-T H.262 (2012) | ISO/IEC 13818-2:2013, Information technology Generic coding of moving pictures and associated audio in
34、formation: Video. ITU-T H.264 Recommendation ITU-T H.264 (V9) (2014), Advanced video coding for generic audiovisual services. ITU-T H.265 Recommendation ITU-T H.265 (V2) (2015), High Efficiency Video Coding. ITU-T H.622.1 Recommendation ITU-T H.622.1 (2008), Architecture and functional requirements
35、for home networks supporting IPTV services. ITU-T H.701 Recommendation ITU-T H.701 (2009), Content delivery error recovery for IPTV services. ITU-T H.720 Recommendation ITU-T H.720 (2008), Overview of IPTV terminal devices and end systems. ITU-T H.750 Recommendation ITU-T H.750 (2008), High-level sp
36、ecification of metadata for IPTV services. ITU-T H.760 Recommendation ITU-T H.760 (2009), Overview of multimedia application frameworks for IPTV services. ITU-T H.770 Recommendation ITU-T H.770 (2009), Mechanisms for service discovery and selection for IPTV services. ITU-T Y.1901 Recommendation ITU-
37、T Y.1901 (2009), Requirements for the support of IPTV services. ITU-T Y.1910 Recommendation ITU-T Y.1910 (2008), IPTV functional architecture. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks. 2 Rec. ITU-T H.721 (04/2015) ANSI/SCTE
38、 194-1 ANSI/SCTE 194-1(2013), DTS-HD AUDIO SYSTEM Part 1: Coding Constraints for Cable Television. ANSI/SCTE 194-2 ANSI/SCTE 194-2 (2013), DTS-HD AUDIO SYSTEM Part 2: Coding Constraints for Carriage over MPEG-2 Transport. ARIB STD-B24 ARIB Standard ARIB STD-B24 Version 5.2 (2008), Data Coding and Tr
39、ansmission Specification for Digital Broadcasting. ARIB STD-B62 ARIB Standard ARIB STD-B62 Version 1.0 (2014), Multimedia Coding Specification for Digital Broadcasting (Second Generation). CEA-708 Consumer Electronics Association CEA Standard CEA-708-D (2008), Digital Television (DTV) Closed Caption
40、ing. ETSI TS 102 366 ETSI TS 102 366 V1.2.1 (2008), Digital Audio Compression (AC-3, Enhanced AC-3) Standard. ETSI EN 300 472 ETSI EN 300 472 V1.3.1 (2003), Digital Video Broadcasting (DVB); Specification for conveying ITU-R System B Teletext in DVB bitstreams. ETSI EN 300 743 ETSI EN 300 743 V1.3.1
41、 (2006), Digital Video Broadcasting (DVB); Subtitling systems. IETF RFC 791 IETF RFC 791 (1981), Internet Protocol. IETF RFC 792 IETF RFC 792 (1981), Internet Control Message Protocol. IETF RFC 1034 IETF RFC 1034 (1987), Domain names concepts and facilities (DNS). IETF RFC 1035 IETF RFC 1035 (1987),
42、 Domain names implementation and specification. IETF RFC 2131 IETF RFC 2131 (1997), Dynamic Host Configuration Protocol. IETF RFC 2181 IETF RFC 2181 (1997), Clarifications to the DNS Specification. IETF RFC 2236 IETF RFC 2236 (1997), Internet Group Management Protocol, Version 2. IETF RFC 2246 IETF
43、RFC 2246 (1999), The TLS Protocol Version 1.0. IETF RFC 2250 IETF RFC 2250 (1998), RTP Payload Format for MPEG1/MPEG2 Video. IETF RFC 2326 IETF RFC 2326 (1998), Real Time Streaming Protocol (RTSP). IETF RFC 2460 IETF RFC 2460 (1998), Internet Protocol, Version 6 (IPv6) Specification. IETF RFC 2461 I
44、ETF RFC 2461 (1998), Neighbour Discovery for IP Version 6 (IPv6). IETF RFC 2462 IETF RFC 2462 (1998), IPv6 Stateless Address Autoconfiguration. IETF RFC 2616 IETF RFC 2616 (1999), Hypertext Transfer Protocol HTTP/1.1. IETF RFC 2671 IETF RFC 2671 (1999), Extension Mechanisms for DNS (EDNS0). IETF RFC
45、 2818 IETF RFC 2818 (2000), HTTP over TLS. IETF RFC 3228 IETF RFC 3228 (2002), IANA Considerations for IPv4 Internet Group Management Protocol (IGMP). IETF RFC 3315 IETF RFC 3315 (2003), Dynamic Host Configuration Protocol for IPv6 (DHCPv6). IETF RFC 3550 IETF RFC 3550 (2003), RTP: A Transport Proto
46、col for Real-Time Applications. IETF RFC 3596 IETF RFC 3596 (2003), DNS Extensions to Support IP Version 6. Rec. ITU-T H.721 (04/2015) 3 IETF RFC 3646 IETF RFC 3646 (2003), DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6). IETF RFC 3736 IETF RFC 3736 (2004), Statel
47、ess Dynamic Host Configuration Protocol (DHCP) Service for IPv6. IETF RFC 3810 IETF RFC 3810 (2004), Multicast Listener Discovery Version 2 (MLDv2) for IPv6. IETF RFC 3986 IETF RFC 3986 (2005), Uniform Resource Identifier (URI): Generic Syntax. IETF RFC 4291 IETF RFC 4291 (2006), IP Version 6 Addres
48、sing Architecture. IETF RFC 4443 IETF RFC 4443 (2006), Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification. ISO/IEC 11172-3 ISO/IEC 11172-3:1993, Information technology Coding of moving pictures and associated audio for digital storage media at up to a
49、bout 1.5 Mbit/s Part 3: Audio. ISO/IEC 13818-7 ISO/IEC 13818-7 (2006), Information technology Generic coding of moving pictures and associated audio information Part 7: Advanced Audio Coding (AAC). ISO/IEC 14496-3 ISO/IEC 14496-3 (2009), Information technology Coding of audio-visual objects Part 3: Audio. ISO/IEC 14496-14 ISO/IEC 14496-14 (2003), Information technology Cod
