Set Top Digital Video Recorders or DVRs (also known as Personal Video Recorders or Hard Disk Recorders) are connected to either a Cable TV signal, a Satellite signal or even a TV Antenna. Digital Video Recorders (DVR) replace a standard cable box or satellite receiver for users to interact with. A person uses an Electronic Program Guide (EPG) to schedule recordings, hours, days or weeks in advance. DVRs record television programs onto a hard drive. These hard drives vary in size, the larger the drive, the more hours of programming you can record.
DVRs allow users to control their television in ways unheard of in the past. DVRs can pause live TV. If the phone rings during an important part of your favorite show, just hit pause and come back and resume when your ready. A program that is recording can be viewed from the beginning while it continues to record. You can use a DVR just like a VCR, once a program is recorded, it can be played back, fast forwarded, paused and rewound, all without tape.