CableCARD is a plug-in card approximately the size of a credit card that allows consumers in the United States to view and record digital cable television channels on digital video recorders, personal computers and televisions without the use of other equipment such as a set top box (STB) provided by a cable television company.
A digital television adapter (DTA), or digital-to-analog converter [box], or commonly known as a converter box, is a device that receives a digital television (
DTV) transmission, and converts that signal into an analog television signal that can be received and displayed on an analog television set.
A set-top box (STB) or set-top unit (STU) is a device that connects to a television and an external source of signal, turning the signal into content which is then displayed on the television screen.