Hnh ENGINEERING
HnHENGINEERING OVERVIEW 1991 has been a productive and rewarding year for Engineers throughout the Corporation. Important projects that have come to fruition include the Broadcasting Centre at Southampton, the Blackstaff development in Belfast, the Millbank parliamentary broadcasting facility, the new Manchester vehicle maintenance base, Television Centre Stage V, Skelton C HF station, and many more, as detailed in the following pages. The year will also be remembered for notable progress on the digital front. The new D3 digital video recorder is rapidly becoming established as the main post production machine, and high quality digital stereo television sound is now available to more than 70% of the BBC's audience via NlCAM 728. However the most notable 'digital event' of 1991 could turn out to be the Digital Audio Broadcasting (DAB) demon- strations that we mounted in Birmingham in July. These demonstrations showed that DAB can deliver CD-quality digital sound to fixed, portable, or car receivers, even in inhospitable reception areas. Some difficulties remain to be overcome, including the need to get agreement on a frequency assignment for new DAB radio services. Nevertheless, most of those attending the demonstrations were convinced that they had witnessed a major technical advance in sound broad- casting, whose introduction cannot long be delayed. TRANSMISSIO TRANSMISSION OPERATIONS As a result of the Broadcasting Act, the transmission responsibilities previously discharged by the IBA United Kingdom have been taken over by a private company, National Skelton C, opened in May 1991 by Mark Transcommunications Limited (NTL). In order to deal Lennox-Boyd, Under Secretary for with the consequent mutual charging for site faci- Foreign and Commonwealth Affairs, is fully lities a computer database has been established, automated and is the UK's first high-power HF which deals with the complicated charging system transmitting station to be operated as a remote and maintains records of NTLfacilities on BBC sites.
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