The digital signal is decoded and converted back into an analog form before it is displayed on the viewer's screen. The digital signal can be received by a digital TV antenna, cable box or satellite receiver - depending on the type of service being used. How does DTV work?ĭigital television uses digital compression to convert digital signals into digital packets of data, which are then transmitted over the air or via cable or satellite. Today, with the growing affordability of digital televisions, most analog television sets have been replaced. In the United States, analog television broadcasts stopped in 2009 and people who had used antennas for "over the air" transmission were required to use a digital set-top box to convert transmissions. Digital television (DTV) is the transmission of television signals using a digital broadcast format rather than conventional analog methods.
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