What is the difference between digital television (DTV) and regular (analogue) TV?
The main difference between analogue TV and digital TV is the way the signal is transmitted. Analogue TV is transmitted in a manner similar to FM radio, through a cable or over the air. That is the reason why it maybe subject to interference, such as ghosting and snow, depending on the distance and location of the TV receiving the signal. In Europe, the analogue TV standards are referred to as PAL and SECAM. Digital TV, or DTV, is transmitted as data bits of information, just as the way music is written on a CD. The main advantage of DTV is that there is no gradual signal loss as distance from the transmitter increases. Furthermore, additional data such as text, audio can be transmitted. Broadcasters can therefore supply surround sound, multiple language audio, text services but the main advantage of DTV is its ability to transmit a High Definition signal (HDTV).
