Security cameras, surveillance systems - Los Angeles, San Diego, Orange County If you're in the market for a video surveillance system based on IP , you will need to know exactly what you are looking for, and. There are a number of technical terms and others that you need to know. Since there is no single definition of what IP really means, not to mention other words, as a network or the Internet, you'll meet so many different explanations as there are sellers.
Initially, the video surveillance was done with analog technologies like CCTV (closed circuit television), the video is stored on tape. Although perfectly suited for monitoring and recording of activity, no broadcast capabilities were present. This technology is far from ideal for remote monitoring. And of course, the bands involved an inherent time lag. Worse still, bands had to be changed on a regular basis, and the quality of captured video tended to be rather low.
Revolutionizing digital video surveillance
With the advent of the Internet and the increasing prevalence of LANs (Local Area Networks), there was a jump in parallel monitoring technology in the nineties. Analog cameras began to be gradually replaced by digital cameras, where prices fell within the domain of feasibility for the average person.
With these advances, the surveillance video can now be sent live over the Internet or LAN. The new digital cameras offer much better quality, clearer images, which were also much easier to work with. This has been a boon to law enforcement in particular.
The basics of IP-based surveillance
In short, the camera "sees" what he is directed to, and sends video data on a local network to a workstation or server. The server or workstation then processes the data. If necessary, the data are displayed, recorder or retransmitted to other computers and networks.
There is software for data analysis, reporting and management of almost all other data feature you could want. Video surveillance is a tool more versatile than ever thanks to these accompanying advances in software.
Really IP digital surveillance uses CCD (digital for you and me) cameras that break the data into packets and stream video over the LAN via an Ethernet cable (Cat 5) cable instead of coaxial cable. This allows more bandwidth and true capacity TCP / IP must be dedicated to the video signal.
IP-based surveillance allows better data mining and retrieval, and encryption capabilities to your data if you need to keep away from prying eyes and manipulation. This is something that analog based surveillance simply can not offer.
A new development is that digital cameras have built in web servers, which means no networked computers are needed to run the cameras, the video data is sent to the final location for viewing or saving to read later. D-Link and Linksys have already offered on the market already, with many more to follow.
Halfway
Between analog and digital worlds is the addition of a DVR or digital video recorder surveillance system existing. Although not based on IP, a DVR system is a step towards such a system. But a DVR system can have the same device and other analog technologies in place but stores video on DVR rather than tape. Unfortunately, poor quality video of the old analog systems is still a problem here.
If you want to monitor.
Posted on February 27, 2010.
