A device or method that uses discrete variations in voltage, frequency, amplitude, locations, etc. to encode, process, or carry binary (zero or one) signals for sound, video, computer data or other information.

Digital Video Recorder

A digital video recorder (DVR) is a device that records video in a digital format to a disk drive or other memory medium within a device. The term includes stand-alone set-top boxes, portable media players and software for personal computers…