What is a set-top box? What are its functions?
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What is a set-top box and its function?
A set-top box (STB) or set-top unit (STU) (one type also colloquially known as a cable box) is an information appliance device that generally contains a TV-tuner input and displays output to a television set and an external source of signal, turning the source signal into content in a form that then be displayed on the television screen or other display device. They are used in cable television, satellite television, and over-the-air television systems, as well as other uses.
Function:-It enables a television set to become a user interface to the Internet and also enables a television set to receive and decode digital television (DTV) broadcasts.A set-top box is necessary to television viewers who wish to use their current analog television sets to receive digital broadcasts.