THE MAGAZINE

Surveillance System Technology Trends

By Sherry Harowitz

Where it is necessary to stream back video, companies have creative ways to cut down on the data load without cutting out the image information that those watching the video will need. OnSSI and Salient each have their software recognize the resolution of the viewing monitor at the receiving end and send only the data needed for a good picture. Salient says that this makes it possible to use an existing 4G network. CheckVideo takes the approach of only sending 10-second clips when there is an alert-level event, which also allows use of just a cell phone network.

Some companies years ago figured out that you could just send frames where there had been motion or change. But now DVTel has put a new twist on that. Instead of sending the entire frame or the video of the change, it just tells the computer at the other end what the change has been in mathematical terms and the computer moves the pixels on its end. That one innovation could help a city with 7,000 surveillance cameras save $5 million in storage costs, says Paul Smith of DVTel.

These are just some of the improvements that are making surveillance systems more affordable by overcoming the traditionally daunting bandwidth and storage issues.
 

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