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THE FUTURE OF TV 1 The Future Of Terrestrial Television 11 High Definition Television 12 The problems of HDTV 13 Digital broadcasting 14 The future 2 Cable Television 21 The history of Cable Television 22 The advantages of having a large cable network 23 The possibilities of combining telecommunication and television networks 3 British Telecom 31 British Telecom and its interactive services 4 Interactive Television 41 What is Interactive Television 42 What technology is needed for Interactive Television 43 How the interactive signal is transmitted 44 The cost of Interactive Television 1 The Future Of Terrestrial Television 11 High Definition Television The future of television is very much in the hands of remarkable advancements in digital technology and the entrepreneurs who see the profit to be made from this recent progress In the search for higher definition programme formats to give us large crisp sharp images with less apparent line structure digital television has been leading the way for the last three years High Definition Television or HDTV will fulfil all these requirements with the receiver using around twice as many lines on screen as the standard 625 we are used to in our living rooms The wide-screen razor sharp images with crystal clear sound offered on HDTV broadcasts require the transmission of vast amounts of data thus necessitating large bandwidth requirements In fact HDTV operates between 20-22MHz a staggering four times the bandwidth of our current 55MHz PAL system Yet this is not a problem because of the recent technological advances in signal compression Replacing the
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