T-REC-J.293-200806-I!!PDF-E.pdf

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 J.293 TELECOMMUNICATION 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-top box Recommendation 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 distribution 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 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 Study 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 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 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, 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 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 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 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 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 members 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 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 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 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 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). 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 platform (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