Broadcast
Broadcasting was one of the earliest uses of the radio spectrum,
and radio and television services continue to expand and develop.
Following the development of analogue radio broadcasting in the
1920s and television in the 1930s, broadcast technology entered a
period of steady expansion and development, during which FM radio
transmission, colour TV and early digital techniques such as
teletext were brought into operation.
In the last decade or so, this stable world has given way to an
explosion of techniques and delivery mechanisms, such as
direct-to-home satellite, digital terrestrial transmission of radio
and television and the use of digital bit-rate reduction techniques
to offer bandwidth compression. Aegis engineers have practical
experience of these developments, having been involved, for example,
with the development of the COFDM
modulation system at the heart of digital terrestrial broadcasts.
One application of COFDM is in the DRM system for digital radio
broadcasting below 30 MHz. With the development of de
facto standards such as RealAudio, it also seems certain that the
Internet will play a large role in the future of broadcasting,
eroding the traditional distinction between telecommunications and
broadcast techniques.
We have been actively involved in this changing world for many
years, having undertaken a wide variety of projects (for groups such
as News International, British Satellite Broadcasting, the European
Radiocommunication Office, European Space Agency and others),
concerned with the future use and development of both satellite and
terrestrial digital broadcasting services. Our expertise covers all
elements of the TV and audio broadcast chain, including spectrum
planning and frequency management, infrastructure services such as SNG
and OB,
transmitter networks and consumer receiver systems. We are also able
to assist with business and market issues such as the cost-benefit
analysis of service provision.
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In spring 2000 we carried out a comprehensive review of
spectrum use in Band II (the FM broadcast band), on behalf of
the UK Radiocommunications Agency, the BBC and the Radio
Authority. The aim of the study was to determine the scope for
additional radio services in the band, so as to inform
government policy decisions. We have also undertaken detailed
spectrum planning for the introduction of broadcast services
in specific areas, both for the BBC and independent
broadcasters.
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"We welcome the study which
highlights in a constructive way the challenges faced in
trying to offer new city-wide services"
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Philip Langsdale, Director of
Distribution and Technology (BBC)
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To discuss how Aegis can help your organisation achieve its goals
in the broadcast industry, contact us at enquiry-2008@aegis-systems.co.uk.
See also:
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