Analog video security systems have been the workhorse of the video surveillance world since the 1970s. They are easy to install, easy to use, and are cost efficient. But industry standard analog cameras have one huge limitation – resolution is limited to VGA. Even so, installers and end users have been reluctant to upgrade to an IP/Network system to get HD video. Why? It might be because of the complexity of networking systems. Or it could be the hassle and cost of re-cabling all your cameras from coax to Ethernet.
Along comes Serial Digital Interface (SDI), a standard from the TV industry. SDI security camera systems offer beautiful, detailed, HD video without the hassle of networking. They use the same coax cable as analog systems so a conversion is feasible for most existing surveillance systems.
Keep the existing coax cable. In fact, keep as many VGA cameras as you want. In some locations, VGA is all the resolution you need. In locations where you want more image detail and the ability to digitally zoom in, like cash registers, doorways, gas pumps, etc., simply swap out the old VGA cameras for new HD-SDI cameras. BNC connectors make it easy.
At the DVR, you’ll need to swap out your old analog DVR for a new hybrid Analog + SDI DVR. Again, BNC connectors make it “plug and play” easy.
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