Set-top box (STB)also colloquially known as a cable box or receiver and historically television decoder, 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 can then be displayed on the television screen or other display device.
Video on demand (VOD)is a media distribution system that allows users to access videos without a traditional video playback device and the constraints of a typical static broadcasting schedule.