Edition No.24 December 2007 DVB-SCENE Tune in to Digital Convergence Tune Welcome to Uruguay 24 The Standard for the Digital World This issue’s highlights > DVB-T Return Channel > Uruguay Adopts DVB > DVB-T in Norway > CPCM > MHP in Spain > Market Watch DVB-SCENE : 02 Peter MacAvock, Executive Director Peter MacAvock, COMPLEX OPTIONS A word from the DVB Project Office Welcome Uruguay. As the debate on trials in HDTV going on in France, and digital terrestrial television in Latin Norway, Estonia and New Zealand America continues, Uruguay has using H.264 for their DVB-T services taken a decision for DVB-T following from the outset, the decision on which extensive assessment of the options. hardware to use is no longer just a We’re delighted to welcome Uruguay to question of middleware or conditional the family, and will be working closely access. with our colleagues there in the coming Issues such as these will be on specification. It promises to be an months to ensure a successful launch the agenda for DVB World 2008 - exciting venue and a conference where of DVB-T there. Importantly, Uruguay particularly as our new hosts Hungary topics at the core of DVB’s future work has chosen to adopt both DVB-T and are in the midst of considering their will be discussed. DVB-H at the same time - one of the options for a DVB-T launch. The Finally, as this is to be the last DVB- first countries to do so. As they move to programme for the conference will also SCENE of 2007, I would like to extend deploy DVB-T, the options for launching deal with issues such as CPCM, IPTV warm wishes from the Project Office to become more complex. With H.264 and of course, the upcoming DVB-T2 all our readers. DVB3.0. DVB-SCENE : 03 00000000000000000 VDVB3.0. NEW 00000000000000000 staNDARDS 3.0 .010101011111DVB3.0. TS 102 606 V1.1.1 “Generic Stream Encapsulation” (Published 10/07) 3.0 .01010101111 TS 101 154 V1.8.1 “Implementation guidelines for the use of MPEG-2 Systems, Video and Audio in satellite, cable and 3.0 .01010101111 000000 terrestrial broadcasting applications” (Published 08/07) 00000000000000000 TS 102 816 V1.1.1 “Personal Video Recorder (PVR)/ Personal Data Recorder (PDR) Extension to the Multimedia Home DVB3.0. Platform” (Published 09/07) 3.0 .010101011111DVB3.0 TS 102 817 V1.1.1 “Digital Recording Extension to Globally Executable MHP (GEM)” (Published 10/07) TR 101 211 V1.8.1 “Guidelines on implementation and usage of Service Information (SI)” (Published 09/07) TR 102 005 V1.3.1 “Specification for the use of Video and Audio Coding in DVB services delivered directly over IP 00000000000000000 protocols” (Published 08/07) 3.0 .01010101111 TS 102 034 V1.3.1 “Transport of MPEG-2 TS Based DVB Services over IP Based Networks (DVB-IP 1.3)” (Published 11/07) 3.0 .010101 TS 102 592 V1.1.1 “IP Datacast over DVB-H: Electronic Service Guide (ESG) Implementation Guidelines” (Published 10/07) 011111DVB3.0. 00000000000000000 3.0 .010101011111DVB3.0. 00000000000000000 3.0 .010101011111B3.0. 00000000000000000 00000000000000000 3.0 .010101011111DVB3.0. 3.0 .01010101111 DVB3.0. 00000000000000000 DVDVB3.0 100000.111111111111.000.1.1.1.1.0101010 12 - 14 March, 2008 Budapest, Hungary Make it a date in your diary For Conference Programme and full details visit www.dvbworld.eu See page 13 for more information DVB3.0. 00000000000000000 The views expressed in this newsletter are those Editors: William Daly, Harold Bergin DVB and MHP are registered trademarks of the VDVB3.0. 00000000000000000 of the individual DVB members or guests and Editorial and Advertising enquiries to: WHD PR DVB Project. Certain other product names, brand are not necessarily the views of the DVB Project Email: [email protected] names and company names may be trademarks or 3.0 .010101011111DVB3.0. 3.0 .01010101111 Office or Steering Board. Telephone: +44 (0)20 7799 3100 designations of their respective owners. 3.0 .01010101111 000000 Published by the DVB Project Office, All rights reserved. No part of this publication may To obtain extra copies of DVB-SCENE please 00000000000000000 c/o European Broadcasting Union, be reproduced without prior consent of the publisher. contact Eoghan O’Sullivan at [email protected]. DVB3.0. 17a Ancienne Route, All content correct at time of printing. Delivery charges will apply. 3.0 .010101011111DVB3.0 CH-1218 Grand Saconnex, Switzerland. © DVB-SCENE 2007. Printed by Lithmark Limited. www.dvb.org, www.mhp.org & www.dvb-h.org 00000000000000000 3.0 .01010101111 3.0 .010101 011111DVB3.0. 00000000000000000 3.0 .010101011111DVB3.0. 00000000000000000 100000.111111111111.000.1.1.1.1.0101010 ONLINE OuTREACH DTV & DVB-RCT (Return Channel) for Rural Area Internet Access D. Prendergast, Dr. Y. Wu, G. Gagnon, C. Nadeau: Communications Research Center (CRC),Ottawa Canada primary coverage area where the STB is close enough to the base station, 16-QAM may be employed. In the interim however, before deployment in a North America context, the ATSC DTV system would require some modification to the protocol stack in the form of a downlink control channel to enable user terminal uplink channel access and power control, etc. Because of the time needed to modify the ATSC In seeking a way to fulfil the users requiring both the DTV and IMS system to work with DVB-RCT, CRC government of Canada’s obligation to services, the STB would be capable first conducted a proof of concept provide every Canadian with broadband of demultiplexing the IMS data as well phase using DVB-T as a downlink to access, a programme for Rural and as providing video and audio output which DVB-RCT is already compatible. Remote Broadband Access was for DTV use. In either case, the data The graph below shows the results initiated at the CRC. Internet Multimedia would be transferred to and from the of a laboratory evaluation where the Service (IMS) to rural areas is difficult computer by an Ethernet link, while for throughput performance of DVB-RCT to provide at reasonable cost using the upscale STB, the video and audio was measured with respect to carrier current technologies because of the would be fed to the monitor/speakers. to noise ratio in QPSK mode when sparse population found in the rural and This return channel technology would subjected to Additive White Gaussian DVB-SCENE : 04 remote areas. Common to all of these have to be implemented in the base Noise. TCP packets were transmitted areas is at least one public television station, STB and data transceiver. on the return channel as fast as the broadcaster with Digital Television For the secondary coverage areas, channel could sustain while the C/N (DTV) capability. CRC determined or area far away from the DTV was varied. A maximum throughput that a possible way of providing a transmitter/base station, a similar of about 4 Mbps was obtained. This broadband access capability to these STB/transceiver operation may be value falls off as the C/N drops below areas was to provide a return channel implemented. However, the return 8.4 dB and declines to zero at a C/N 3.0 .01010101111 that would allow full duplex operation of channel throughput may be reduced of about 5.4 dB. This is an expected the ATSC DTV system. After studying because of a lower uplink output power result since for QPSK a C/N of 8.4 many alternatives, CRC decided to use capability of the STB coupled with including coding generates a BER of - 4 00000000000000000 the ATSC DTV system for the downlink added propagation impairments and about 10 . This BER increases as since DTV infrastructures are replacing a lower level of modulation. In case the C/N degrades, hence the shape of the NTSC analogue ones; and DVB- of severe propagation impairments 3.0 .010101011111B3.0. RCT for the wireless return channel. due to the range of the secondary In this dual standard approach, the coverage area, trees etc., On Channel challenge is to create the interface Repeaters (OCR) may be deployed 00000000000000000 through all peers of the OSI (Open in order to improve the return channel Systems Interconnection) model to performance and hence the system 3.0 .01010101111 ensure a successful implementation of gain. A network of OCRs may be 011111DVB3.0. the system. deployed in the secondary service 3.0 .010101 The diagram above shows the area to facilitate the collection of return overall concept of a return channel channel data. implementation for DTV. In this This data may then be transmitted 00000000000000000 implementation, two service areas to the base station by a directional are defined, a primary service area antenna. It provides the advantage consisting of the base station and of being cost effective and spectrum the curve in the graph. In light of these its associated coverage area and a efficient in that it uses the same results and by considering a noise floor secondary service area featuring a base frequency as the return channel. Base of -104 dBm, a practical range of about station repeater. Within each service station repeaters may also be useful in 30 km is expected. A similar curve is area there is a primary coverage region extending the coverage range beyond expected for 16-QAM and 64-QAM where 8-VSB modulation is used for say, a valley village to another valley but with a higher throughput. These the forward channel. Here, users are village separated by distance or a hill, modulation levels may be realizable for provided with a set-top box (STB) or as depicted in the secondary service STBs closer to the base station since 010101010 data transceiver through which they area in the diagram.