Digital Braodcasting Symposium 2012
9
Systems Standards: New Features and their Evaluation
The first session looked at recent enhancements in digital system standards and emerging new standards, their features and applications. The presentation on ‘Standards Selection and Evaluation’ addressed the need for standards. Digital system standards used in industry are evolving with enhancements to keep in step with advances in IC chip architecture and R&D work progress in broadcast, communication, computer and IT. Selection of the appropriate standard depends on market drivers together with techno- economic, policy and cost issues. Like broadcast delivery, standards require field tests to validate performance and feasibility, as well as trying ways of reducing capital and operating expenditure.
Philip Laven Doug iies Ruxandra Obreja
The DRM+ standard has been endorsed by the ITU and, with this, DRM standards now cover all bands, up to and including VHF. Looking at recent developments, India, Russia and Brazil have enhanced their engagement with DRM30 and DRM+, thus becoming key players. Tests have been completed in other countries including the
UK and Italy. New receivers are coming into the market, as seen at IBC 2011, and more are expected at the coming NAB. A sizeable number of AM transmitters in Russia, India and other countries are being replaced with DRM transmitters.
DVB-T2 is promoted as being environmentally friendly with better efficiency. Compared to DVB-T, the current standard provides for more services per channel while operating at a lower transmitter power, resulting in more cost effective operation. With receiver prices falling rapidly the take up of the standard is increasing worldwide with many countries in this region already adopting DVB-T2.
Image Acquisition for HD, 3DTV and Beyond
Significant developments have taken place in enhanced image capture and processing for delivery of 3D, HDTV and UltraHDTV. Huge advances have been achieved in CCD and CMOS image sensor technology, by Sony both these technologies having come a long way with steady enhancements over the years. CCD has sufficiently low noise and very low vertical smear, while the noise from CMOS is even lower and there is no smear, though it has flash banding when light changes during the scan. CMOS has higher SNR and is suitable for high frame rates with low power consumption, making it suitable for small size camcorders. Apart from sensors SONY has developed several image enhancement technologies for cameras, to optimise output.
Jorn Jensen
significant number of cost effective receivers is available, including mobile devices. The car industry has also realised the potential of DAB+ and it is becoming evident that digital radio, with its clarity, interactivity, value-added services, reduced capex and efficient spectrum use, is the future of radio.
The HE-AAC global standard is supported by many industry players and is incorporated into millions of devices. The highlights of the standard include very efficient bit rates with uncompromising sound quality; a cost effective licensing mechanism; multi-channel, metadata and flexible control possibilities for different applications. Bitrate efficiency lowers bandwidth requirements and spectrum costs.
Tony Fiedler
John Bigeni
The take up of DAB/DAB+ and DMB standards is increasing on five continents. A major driver for this is that as
DB Symposium hosts online Webinar session
This special workshop session was organised jointly with LStelcom. In it, the expert, Mr Markus Morgen of LStelcom, addressed the participants through an online webinar from Germany. His video and audio presentation was projected on a large screen and he later answered questions from the participants.
Regulators and operators, it was said, play key roles in frequency and network planning. The regulators focussing on the compatibility and avoidance of interference and the operators mainly focussing on coverage. The webinar highlighted both these aspects and the interaction between them, that needs to be managed. The session also detailed the steps involved in the typical workflow of a modern DVB-T2 planning exercise.
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