They've had to switch their over the air broadcasting to all digital broadcasting.
Satellite television service, just like cable, was unaffected by the digital television switch.
Older televisions can make the switch to digital programming with a digital converter. The converters are usually about $20-$60 and are available at most electronics stores.
It is not illegal not to switch. It's just if everybody else are switched to digital, you don't have anything to watch. Basically it used to be analog signal masts were sending out to your TV, nowadays it's (mainly) digital as it guarantees better quality. Soon you'll don't get analog signal anymore, so to watch TV you have to be digital.
Milton Keynes will be one of the last UK regions to retain analogue broadcasts. It is planned to turn off analogue transmitters in 2012 but digital television will be available well before the analogue switch off.
Most US tv stations have already switched to HDTV
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You probably won't need to get new televisions, and at worst would need to purchase a digital converter box for roughly fifty dollars.
Yes it will. The digital switch over relates to broadcast television only. Analog broadcasts are being turned off from 2009 - 2012 across several countries. Local sources such as DVD players and games consoles will not be affected in any way at all.
Digital television has nothing to do with cable or satellite. The only thing digital television means is that the signal that is distributed is a digital one and not analog. The big switch that occurred two years ago means that everyone receives a digital signal. Now, if you want content, you are going to have to subscribe to a cable or satellite provider. What you probably saw was a basic service that gave you local channels, but not much else.
Digital full HD
Yes you will. The digital switch over that is progressing in many countries is supported by the promotion of digital set top boxes. They are available at a minimal cost ($25 in the US or £20 in the UK for example). The set top box receives the digital transmissions and converts the signal to analog video and audio signals to be fed into an analog television. With a very few exceptions, analog televisions will not handle HD channels but they should be quite capable of receiving all SD channels. Similarly, most satellite and cable boxes have SD analog outputs so analog televisions will work with most broadcast platforms.