Digital television (DTV) is an innovative type of over-the-air broadcasting technology that enables
TV stations to provide dramatically clearer pictures and better sound quality.
DTV is more efficient and more flexible than the traditional way of broadcasting known as analog. For example, DTV makes it possible for stations to broadcast multiple channels of free programming all at once (called multicasting), instead of broadcasting one channel at a time. DTV technology can also be used to deliver future interactive video and data services that analog technology can’t provide.
What is analog television?
Analog television service is the traditional method of transmitting signals. Since the inception of television, analog transmission has been the standard broadcast technology. But analog is not as efficient as digital television. It uses up much more valuable spectrum than digital, and only allows TV stations to transmit one channel at a time. Using the same amount of spectrum, a digital signal lets stations broadcast up to four or more programs at once. Analog is also susceptible to interference and “snow,” making a picture less clear.
Why is America switching to DTV?
DTV is not only a more efficient way to broadcast, and it will also free up the airwaves for a variety of
new services. DTV provides crystal-clear pictures and sound, more channels and even free, over-the-air high-definition television (HDTV) for consumers who have HD television sets. DTV will also allow more services than ever before with free, broadcast television.
