D/A converter - technical definition

(Digital/Analog converter) A device that converts digital code into analog signals. The most common applications convert digital audio to analog sound waves for speakers and convert digital video to analog TV (NTSC, PAL). The D/A converter (DAC) may be contained on a single chip or may be a circuit within a chip. Contrast with A/D converter. See DSP and ladder DAC.

D/A Converter Set-Top Boxes
A digital-to-analog set-top box converts digital TV signals to the original analog TV standard (see TV converter box). See DTV.