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DVB-SCENE Issue 9.Pmd Edition No.09 March 2004 DVB - SCENE Tune in to Digital Convergence in to Digital Tune riding the wave 09 HD The Standard for the Digital World This issue’s highlights > MHP - OCAP - ACAP > High Definition TV > Birth of a standard - DVB-H > MHP in Italy > Market Watch DELIVERING MILESTONE Executive Director Peter MacAvock, SPECIFICATIONS A word from the DVB Project Office of the DVB’s Technical Module meetings, the gathered experts are asked if they see any non-technical 2004 is an exciting year already for barriers to a particular technology DVB. During the course of the year, a being studied in DVB. Consistently number of key new specifications will over the last year, Technical Module be published, trialed, and perhaps representatives have flagged IPR even put into service. associated with the implementation of DVB-S2 is the key satellite specification MPEG-4 Part 10/AVC as being a very already introduced in DVB-SCENE. significant unknown factor which Published this year, and already the could adversely influence the enhancements aimed at improving subject of much commercial interest, it popularity of this powerful new battery life and reception in the promises to be a worthy successor codec. The DVB has consistently difficult handheld environment, the for DVB-S – which continues to sought clarity from those DVB-H specifications have just been provide the excellent service and organisations holding essential IPR in published. As the year goes on, we affordable receivers to millions of these technologies with a view to will cover this important technology in satellite TV viewers worldwide. making informed decisions. Such more detail, with reports on the Coupled with the latest generation of clarity has been sadly lacking. extensive trials being put together. video and audio codecs, DVB-S2 As an industry initiative, DVB is a There is no doubt in DVB circles that promises to give a fillip to those body formed of organisations who DVB-H is a significant development. wishing to launch new services are both potential licensors and Never designed to replace DVB-T, it requiring more sophisticated domestic will compliment existing digital licensees of technology. Thus, we DVB-SCENE : 03 receiving equipment. HDTV is just such must respect the right of organisations terrestrial services, offering operators an application. HDTV displays are to exercise their intellectual property the possibility to extend their reach to becoming more and more prevalent in rights on the one hand, while the mobile handset market. consumers’ homes and the broadcast producing specifications which are MHP continues to grow from strength community needs to target these commercially viable on the other. IPR to strength as well. With the recent displays if it is to compete with DVD plays an important part in this latter publication of ACAP as a candidate and the new generation HD-DVD. consideration, and thus DVB worked ATSC standard in the US, the But Euro1080 are not waiting for hard on a balanced IPR policy. DVB is conversion of the world’s API DVB-S2 or the availability of the new the basis for most successful digital systems to MHP is completed. Such codecs to launch a HDTV satellite television systems around the world, harmonisation between world service in Europe. It promises to be an and maintaining a reasonable IPR standardisation bodies is rare, and interesting test of the European policy is essential to safeguarding the hopefully a taste of future consumers’ willingness to adopt HDTV future of these systems. cooperation. DVB’s main task is to – a technology more significant in its Another interesting development on ensure that MHP remains at the consequences for the broadcasting the DVB front is DVB-H. A series of forefront of developments in the iTV industry than in the consumer interest measures designed to facilitate access market, and that any developments it is generating so far. to IP based DVB services on handheld are disseminated amongst other There is one potential blot on this rosy devices. Comprising DVB-T’s physical standards bodies using MHP as the landscape – the dreaded IPR. At each layer with a number of service layer basis for their middleware. The views expressed in this newsletter are those of the individual DVB members Cover: Euro1080 was launched on 1st January 2004 and is the first channel or guests and are not necessarily the to broadcast exclusively in high definition throughout Europe. The service views of the DVB Project Office or offers high-quality content: sports, music, films and cultural events are being Steering Board. broadcast by satellite with best quality surround sound, in HDTV format. Published by the DVB Project Office, c/o European Broadcasting Union, 17a Ancienne Route, CH-1218 Grand Saconnex, Switzerland. www.dvb.org & www.mhp.org Printed by Lithmark Limited. NEW Design by GyroGroup. Editors: William Daly, Harold Bergin Editorial and Advertising enquiries to: WHD PR MEMBERS Email: [email protected] Telephone: +44 (0)20 7799 3100 • Cox Communications • Belgacom • All rights reserved. No part of this publication may be • Electronics Co. Ltd • Esmertec AG • reproduced without prior consent of the publisher. All • Shenzen Coship • Teamcast • content correct at time of printing. (c) DVB-SCENE 2003. DVB an MHP are registered trademarks of the • Telecomunications Institute-University of Aveiro • DVB Project. Certain other product names, brand • Wishnet Inc. • names and company names may be trademarks or designations of their respective owners. THE MHP FAMILY TREE Jon Piesing, Philips Digital Systems Laboratories, Redhill, UK One of the goals of the MHP specification was to specify One important feature of MHP which can be re-used to receivers well enough that a consumer can buy a receiver some extent in GEM terminal specifications is the and move it between different MHP markets and not have to conformance tests. While some of the MHP conformance buy a new receiver for each. This means MHP is not just an tests are specific to previous DVB specifications, (e.g. ‘API’ specification; it specifies the interface between the those relating to access to DVB service information), most of receiver and the network to which it’s connected. To the remainder can be reused with some work. For example, achieve this goal, MHP builds on the vast set of previous many of the MHP conformance tests are packaged in a form DVB specifications including those for service information, suitable to be used with a small broadcast system for MHP subtitles, the common interface (conditional access) and receivers without special testing interfaces. While the test data broadcasting. may not need to be changed for a non-MHP specification, A consequence of the close relationship between MHP and the packaging will almost certainly need changing. The the previous DVB specifications is that MHP cannot be industry still has to find a viable model for sharing the costs of used in markets where these previous specifications are creating and reviewing test suites like these between those not used. For example, the US has its own specifications who use them and those who benefit from them. As a for system information and cable in particular uses result, GEM terminal specifications do not automatically proprietary formats for service information. The CableCARD have the right to reuse the MHP conformance tests since is the US equivalent of DVB’s common interface. Closed those tests remain the property of their creators and not captions in the US are similar to DVB subtitles but the use the DVB project. case is not quite the same. The specifications defined in ARIB ARIB for the Japanese market are different again. There Service Information Netwrok Protocols are also other market related differences, e.g. the impact of DVB-SCENE : 04 the difference between 50Hz video vs 60Hz video. ACAP MHP In the US, the original version of OCAP defined its own Features Service Information subset of MHP to remove and replace inappropriate from DASE GEM Conditional Access previous DVB specifications. This causes a problem with the DVB project’s IPR rules – patent holders are only Netwrok Protocols required to license IPR for ‘equipment fully complying with’ OCAP the DVB specifications. In order to solve this problem, DVB Service Information Conditional Access created the ‘Globally Executable MHP’ (GEM) specification Monitor Application closely aligned to the OCAP subset of MHP. GEM defines a Unbound Applications mandatory core of features which are required to be supported on all specifications which build on it (called Jon Piesing is a Senior Technical Consultant at ‘GEM terminal specifications’). It also defines a set of Philips Digital Systems Laboratories, Redhill, UK. He functions where either the MHP original must be used or a chairs the DVB Technical Module group TAM replacement must be provided. For example, OCAP and (Technical Aspects of the MHP). In Philips, he runs ACAP use the MHP version of the DSMCC object carousel, the project which between 1999 and 2001 produced ARIB use their own data broadcast specification instead. the widely used ‘Trimedia’ prototype MHP receiver. GEARING UP FOR OCAP applications written for MHP can readily DVB members demonstrate end-to-end options for the US industry. be adapted for OCAP use. Of course applications have also to work in the The OpenCable project being run by the considerably within the OpenCable right screen layout and be adapted to US cable industry through CableLabs project to make the system now being the slightly different environment, but includes two critical technologies tested for market introduction. teams of developers working in MHP derived from work done in the DVB The second key technology is OCAP are now getting together to show how group. The first is the CableCARD which is interactive TV technology end-to-end solutions can work for device which allows the separation of based on DVB MHP and conformant OCAP.
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