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Why all the fuss about digital

Haven't we come a long way since Baird and Marconi started alternate broadcasts back in 1936.

The digital revolution is here and there is no turning back.

Digital: Sky digital via satellite, Freeview via TV aerial, cable digital, BBC Freesat via satellite
Analogue: Terrestrial TV aerial and cable.

The Truth
Prior to Digital entering the market all television broadcasts were transmitted as an analogue signal, which meant a continuous variable wave pattern being broadcast that was (and still is) susceptible to interference. We have all seen the effects of ghosted images or grainy pictures due to a poor signal. The amount of space each channel uses on the waveband meant that it was becoming near impossible to broadcast any further channels without causing some interference with customers equipment or existing TV channels.
Channel 5 who were awarded their terrestrial licence in October 1995 had a major task on their hands trying to fit this extra channel into the existing waveband. They were aware that broadcasting would be on a similar frequency to the output of a large number of video recorders, hence the big channel 5 retune.

Then came the launch of Digital transmissions, Sky's satellite digital service started in October 1998 followed shortly by OnDigital in November 1998 and the more recent cable digital.
Digital broadcasting is transmitted in the form of binary computer codes (IE 0100110) it can be compressed to give a larger number of channels within a certain bandwidth and the best part of all is that there are no grainy pictures. The receiver either decodes the data to give a perfect picture or where there is insufficient data there will be no picture at all.
The result should be excellent picture quality with near CD type sound.

The potential is enormous especially in the field of interactive TV; we can now communicate with our TV set and retrieve information due to the telephone line now being connected to the digital receiver. We can now watch true widescreen TV pictures (with a widescreen TV of course) and see those outside edges which we have never seen before.
Looking to the future there is every possibility that we will be able to watch any film that has ever been made or listen to any song of our choice at the press of a button, even use the TV set as a videophone link.
We can already communicate via email to anywhere in the world; we can do our home banking, shopping and see what is on at the local cinema.
Where will all this lead? Your guess is as good as mine.

The Myths
I have to change my TV set to a new digital one.

No! unless you have one of the very old 405 line TV's (which i am sure must be extinct by now) virtually any TV is capable of receiving Digital broadcasts via a set top box. We are seeing TV sets being produced that have a built in Digital receiver and of course widescreen TV's. If you are looking to buy a new TV you can go for one of these features apart from that you old TV set will work fine.

Tip
If you are buying a new TV with integrated Digital please check with the retailer to ensure that you live in an area which will receive the Digital broadcasts (Now called Freeview). We have come across customers that have paid extra money for this and have no chance of receiving it at all. To test your area for digital terrestrial signals please use the following link:  Check your Signal
  

Analogue signals are being switched off soon.
Sky announced they will be switching off analogue satellite signals around the middle of 2001, the analogue terrestrial TV signals (TV aerial) are slowly being switched off according to area, the majority being shutdown from 2010.

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