Historically, video from a surveillance system was recorded in analog. Analog systems, however, come with several limitations. Analog recording requires a physical tape, a VCR tape, which can increase expenses and limit storage. Reusing tapes will lead to lower video quality and hence lower identification capabilities. Tapes need to be continuously replaced to maintain constant surveillance recording.

The introduction of digital video recorders into the market has eliminated many of the limitations common with analog systems. Digital recorders can continuously record video streams without the need to replace tapes. Digital video offers a better picture quality than that of analog. Higher picture quality allows the surveillance video to be more useful for identification purposes.

Digital video recording (DVR) has many more functions than analog recording. DVR can record multiple channels simultaneously. DVRs eliminate the need to "fast forward/rewind" tapes to find a specific date and time. Instead, one can easily locate a specific time period with a digital recorder. Digital systems can be set to record only when triggered by a motion detector, eliminating needless recording.

Remote Access to Digital Surveillance Recordings

Digital surveillance recording allows individuals to have remote access and control of the system. Remote access is a major benefit, as video can be monitored from any location throughout the world. Using the Internet for access, users can manipulate cameras and stop or start recording video data. The combination of the Internet and digital video surveillance systems gives users high flexibility and control over securing their property.