![]() The cost of storage capacity on physical media such as hard disk drives (HDDs), digital versatile discs (DVDs), or network-attached storage (NAS) is a small fraction of analog tape-based recording cost. Users now make use of digital-only technologies such as real-time analytics, scene search, motion- and activity-detection alarms, and remote access over IP networks. Video footage can be digitally recorded, processed, and streamed over digital networks at virtually any level of image quality, including high definition (HD). DVRs now offer overwhelming advantages over analog VCRs in security applications. The analog VCR has been replaced by digital video recorders (DVRs) in security systems that require video monitoring and recording. Analog CCTV security systems are moving to digital technology, and video recording is leading this transition. ![]()
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December 2022
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