1、 International Telecommunication Union ITU-T J.293TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2008) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Cable modems Component definition and interface specification for the next generation set-
2、top boxRecommendation ITU-T J.293 Rec. ITU-T J.293 (06/2008) i Recommendation ITU-T J.293 Component definition and interface specification for the next generation set-top box Summary Recommendation ITU-T J.293 defines three categories of STB to support the combination of various kinds of content dis
3、tribution schemes including RF-based and IP-based networks. It also specifies STB components and interfaces based on the architecture defined in Recommendations ITU-T J.290, J.291 and J.292. This Recommendation further describes a configurable approach in order to support the region-specific content
4、 distribution systems. This Recommendation describes interfaces and behaviours of the components that constitute the STB in terms of physical issues, protocols, operating system, software platform, user interfaces, and so on. Source Recommendation ITU-T J.293 was approved on 13 June 2008 by ITU-T St
5、udy Group 9 (2005-2008) under Recommendation ITU-T A.8 procedure. ii Rec. ITU-T J.293 (06/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommuni
6、cation 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. The World Telecommunication Standardization Assembl
7、y (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 Resolution 1. In some areas of information technology which
8、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 and a recognized operating agency. Compliance with this
9、 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 met. The words “shall“ or some other obligatory language
10、 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 ITU draws attention to the possibility that the practice or implementation of this Reco
11、mmendation 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 Recommendation development process. As of the date of ap
12、proval 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 information and are therefore strongly urged to consult the TS
13、B 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 J.293 (06/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative References 1 2.2
14、Informative References 3 3 Definitions 3 3.1 Terms defined elsewhere 3 3.2 Terms defined in this Recommendation. 3 4 Abbreviations and acronyms 3 5 System Overview 5 5.1 Content distribution context . 5 5.2 Reference STB Architecture. 6 5.3 Use case scenarios 7 5.4 Home networking configurations. 8
15、5.5 Design Concept 8 6 STB interfaces 9 6.1 Logical interfaces . 9 6.2 Physical interfaces 10 6.3 Implementation examples. 12 6.4 IP-related protocols used for NW-TD1, NW-TD2, HN-TD1, and HN-TD2. 13 7 Specifications of components. 13 7.1 Provisioning, Activation, Configuration, and Maintenance (PACM
16、) 13 7.2 Signal reception 15 7.3 Transport stream handling 17 7.4 Security processing. 19 7.5 Media (video, audio, text, etc.) decoding . 22 7.6 Rendering (video, audio, graphics processor) 22 7.7 Output signal processor 24 7.8 Digital Video Recorder (DVR) and its control. 24 7.9 Application platfor
17、m (Middleware) . 25 7.10 Home Networking 26 7.11 External peripheral devices controller 27 7.12 STB remote management . 27 7.13 Diagnostics . 27 Appendix I Implementation examples of network interface. 29 I.1 Hybrid STB (Category 1 STB). 29 I.2 Hybrid STB with eCM (Category 2 STB) 30 I.3 IP-only STB
18、 (Category 3 STB) 32 iv Rec. ITU-T J.293 (06/2008) Page Appendix II Examples of Home Networking Configurations 33 II.1 Home networking with IP-based access network. 33 II.2 Home networking with Cable-based access network. 34 Appendix III Relationship between J.700 and J.293 36 Appendix IV Implementa
19、tion example of J.293. 38 Appendix V Relationship between APIs and Bundle Application Programs. 40 Rec. ITU-T J.293 (06/2008) 1 Recommendation ITU-T J.293 Component definition and interface specification for the next generation set-top box 1 Scope This Recommendation defines three categories of STB
20、to support the combination of various kinds of content distribution schemes including RF-based and IP-based networks. It also specifies STB components and interfaces based on the architecture defined in ITU-T J.290, ITU-T J.291 and ITU-T J.292. This Recommendation further describes a configurable ap
21、proach in order to support the region-specific content distribution systems. This Recommendation describes interfaces and behaviours of the components that constitute the STB in terms of physical issues, protocols, operating system, software platform, user interfaces, and so on. In addition, this Re
22、commendation is applicable not only to an external independent box implementation (i.e., STB) but also to other approaches such as TV panel-embedded implementation. NOTE 1 This Recommendation covers the existing content distribution systems including cable TV and IPTV at the time of publication, is
23、subject to modification when a new content distribution system such as NGN-based IPTV is specified and available. NOTE 2 The structure and content of this Recommendation have been organized for ease of use by those familiar with the original source material; as such, the usual style of ITU-T recomme
24、ndations has not been applied. 2 References 2.1 Normative References The following ITU-T Recommendations and 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 Rec
25、ommendations 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 other references listed below. A list of the currently valid ITU-T Recommendations is regular
26、ly 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 G.9954 Recommendation ITU-T G.9954 (2007), Home networking transceivers Enhanced physical, media access, and link layer specifications. ITU-T H.222.
27、0 Recommendation ITU-T H.222.0 (2006) | ISO/IEC 13818-1:2007, Information technology Generic coding of moving pictures and associated audio information: Systems. ITU-T H.SUP1 H-series Recommendations Supplement 1 (1999), Application profile Sign language and lip-reading real-time conversation using
28、low bit rate video communication. ITU-T J.83 Recommendation ITU-T J.83 (2007), Digital multi-programme systems for television, sound and data services for cable distribution. ITU-T J.190 Recommendation ITU-T J.190 (2007), Architecture of MediaHomeNet. ITU-T J.200 Recommendation ITU-T J.200 (2001), W
29、orldwide common core Application environment for digital interactive television services. 2 Rec. ITU-T J.293 (06/2008) ITU-T J.201 Recommendation ITU-T J.201 (2004), Harmonization of declarative content format for interactive television applications. ITU-T J.202 Recommendation ITU-T J.202 (2008), Ha
30、rmonization of procedural content formats for interactive TV applications. ITU-T J.215 Recommendation ITU-T J.215 (2007), Client digital program insertion API. ITU-T J.290 Recommendation ITU-T J.290 (2006), Next generation set-top-box core architecture. ITU-T J.291 Recommendation ITU-T J.291 (2006),
31、 Next generation set-top-box cable architecture. ITU-T J.292 Recommendation ITU-T J.292 (2006), Next generation set-top-box media independent architecture. ITU-T J.700 Recommendation ITU-T J.700 (2007), IPTV service requirements and framework for secondary distribution. ITU-R BT.1306 Recommendation
32、ITU-R BT.1306 (2006), Error correction, data framing, modulation and emission methods for digital terrestrial television broadcasting. ITU-R BO.1408 Recommendation ITU-R BO.1408 (2002), Transmission system for advanced multimedia services provided by integrated services digital broadcasting in a bro
33、adcasting-satellite channel. ITU-R BT.1700 Recommendation ITU-R BT.1700 (2005), Characteristics of composite video signals for conventional analogue television systems. IEC 60958 IEC 60958 (2006), Digital audio interface. IEC 62360 IEC 62360 (2008), Baseline specifications of satellite and terrestri
34、al receivers for ISDB (Integrated Service for Digital Broadcast). IEC 62481-1 IEC 62481-1 Ed. 1.0 (2007), Digital living network alliance (DLNA) home networked device interoperability guidelines Part 1: Architecture and protocol. IEC 62481-2 IEC 62481-2 Ed. 1.0 (2007), Digital living network allianc
35、e (DLNA) home networked device interoperability guidelines Part 2: DLNA media formats. RFC 2131 IETF RFC 2131 (1997), Dynamic Host Configuration Protocol. RFC 2250 IETF RFC 2250 (1998), RTP Payload Format for MPEG1/MPEG2 Video. RFC 3315 IETF RFC 3315 (2003), Dynamic Host Configuration Protocol for I
36、Pv6 (DHCPv6). RFC 4862 IETF RFC 4862 (2007), IPv6 Stateless Address Autoconfiguration. DVB-IP ETSI TS 102 034 V1.3.1 (2007), Digital Video Broadcasting (DVB); Transport of MPEG-2 TS Based DVB Services over IP Based Networks. TR-069 DSL Forum TR 069 (2007), CPE WAN Management Protocol v1.1. TR-135 DS
37、L Forum TR 135 (2007), Data Model for TR-069 Enabled STB. ISO 13818-6 ISO | IEC 13818-6:1998, Information technology Generic coding of moving pictures and associated audio information Part 6: Extensions for DSM-CC. Rec. ITU-T J.293 (06/2008) 3 2.2 Informative References ACC-CHECKLIST ITU-T Technical
38、 Paper (2006), FSTP-TACL Telecommunications Accessibility Checklist. OC-SP-HOST2.1 OC-SP-HOST2.1-CFR-I01-070720, OpenCable Host Device 2.1 Core Functional Requirements. 3 Definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following
39、terms: 3.2.1 BC-TD: A logical interface defined in 6.1.1 for content reception through a non-IP (RF-based) network. 3.2.2 NW-TD1: A logical interface defined in 6.1.2 for content reception through an IP network. 3.2.3 NW-TD2: A logical interface defined in 6.1.3 for interactive communications to out
40、side of a home network through an IP network. 3.2.4 HN-TD1: A logical interface defined in 6.1.4 for content reception through an IP home network. 3.2.5 HN-TD2: A logical interface defined in 6.1.5 for interactive communications to entities within an IP home network. 3.2.6 TD-PD: A logical interface
41、 defined in 6.1.6 for connection between a peripheral device and the STB. 3.2.7 TD-OD: A logical interface defined in 6.1.7 between an output device and the STB. 3.2.8 home network coaxial modem: A modem for IP communications modulated over Coaxial cable for communications within the home, e.g., MOC
42、A, HPNA over Coax. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AOD Approved Output Domain ASD Authorized Service Domain BED Best Effort Domain CA Conditional Access CAS Conditional Access System CM Cable Modem CMTS Cable Modem Termination System CP
43、E Customer Premises Equipment CSP Configurable Security Processor DCAS Downloadable Conditional Access System DVR Digital Video Recorder eCM Embedded Cable Modem 4 Rec. ITU-T J.293 (06/2008) ECM Entitlement Control Message EMM Entitlement Management Message GPU Graphics Processing Unit GSD Guarantee
44、d Service Domain HDD Hard Disk Drive HFC Hybrid Fibre and Coaxial HPNA Home Phoneline Networking Alliance IP Internet Protocol MPEG Moving Picture Expert Group OFDM Orthogonal Frequency Division Multiplexing PACM Provisioning, Activation, Configuration, and Maintenance PES Packetized Elementary Stre
45、am PSI Program Specific Information QAM Quadrature Amplitude Modulation RF Radio Frequency RG Residential Gateway RTP Real-time Transport Protocol SAC Secure Authenticated Channel SI Service Information STB Set-Top Box TCP Transmission Control Protocol TS Transport Stream UDP User Datagram Protocol
46、WDM Wavelength Division Multiplexing Rec. ITU-T J.293 (06/2008) 5 5 System Overview 5.1 Content distribution context DOCSISCMTSRFModulationAccess NetworkCategory 2 STBCategory 1 STBCategory 3 STBRGBroadcast/VOD ContentDigitalAnalogRF ContentDOCSIS IP ContentRF ContentIP ContentIP ContentDOCSISCMInsi
47、de the homeHybrid STBHybrid STB with eCMIP-only STBHead-end sideIP Content over DOCSISRF Content over HFC or PONIP ContentContent Delivery NetworkFigure 1 Client devices in an assumed content distribution network: content flow aspect Figure 1 shows an assumed distribution network drawn in a content
48、flow aspect. In this Recommendation, the STB receives content signals from the head-end and makes an interactive communication as an in-home equipment (CPE). In Figure 1, there are two cases for content signal distribution, i.e., RF modulated signals such as QAM, OFDM and IP packets such as RTP/UDP/
49、IP. Only IP technology is used for control and interactive communication signal flow in this context. The most applicable access networks are HFC, DSL, or Optical Fibre, but other networks are envisioned. The RF signal can be carried by an HFC or Optical Fibre network. The IP signal may be carried by HFC with DOCSIS, Optical Fibre, DSL or other access networks that support IP transmission, e.g., WiMax. This Recommendation defines three categories of STB as shown in Figure 1. Category 1 STB (
