Their are two types of digital TV signals. A Standard Definition (SD) and a High Definition (HD) TV signal. The main difference between them is the resolution (amount of dots and details displayed on your TV) and the sound quality being transmitted . An SD channel will transmit normal PCM sound, whereas HD channels have the ability of transmitting 5.1 Dolby Digital Surround Sound.
Most people automatically think that you need a brand spanking new High Definition LCD TV to view these sorts of digital TV signals. Thats not the case, if you have an older TV you can view these signal as long as they have a composite (yellow, white and red) connection. A composite analogue connection is still able to transmit a digital signal.
If you have a wide screen LCD TV but see some fat people on your TV, you might not have a digital tuner/set top box built into your TV or you may have to adjust the aspect ratio. Nows the time to take advantage of the quality of your screen and set aside some money to buy a HD or SD set top box. I would recommend buying a HD Set top box as it would enable to view the full range of channels available (SD and HD) from the networks.
If you were to buy a SD Set top box only you would only be able to pickup the Standard Definition channels. If you already own a set top box but don't know if you have a standard or high definition one, call your manufacturer, as you might have to re-scan your channels to receive the full channel listing available today. If your set top box has a HDMI (cable type) output don't assume that you have a HD set top box. HD channels are identified by the HD tag at the end of the channel name, One HD, SBS HD, etc.
The newer your TV the more cable connections options you will have available to you.
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