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Old 06-12-2004, 21:54   #19
Pob!
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Join Date: Dec 2004
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Re: NTL should switch to a digital only service!

Quote:
Originally Posted by spiderplant
Are you sure about that? Or do you mean 15Mbps?
Well this is confusing, and a google search uncovers lots of info, but although digital data throughput is measured in bits per second, HDTV or any digital TV broadcast is still said to use 'bandwidth' to express how much room is needed to deliver the signal. In japan the bandwidth needed to supply one channel is 20Mhz, but using compression in the USA they can fit one HDTV and two standard channels into a 6mhz feed, so there is a real range of figures.
http://www.pbs.org/opb/crashcourse/d...g/squeeze.html
Whichever way you look at it though, HDTV will use up a lot more room than existing digital broadcasts.
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