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:: The basics of IP video surveillance ::
A digital camera views the scene in front of
it, broadcasts the video images as a digitized signal
over a LAN line (Local Area Network) where it's then
transmitted to a computer or server. The server in turn
manages all of this information. Depending upon the
software used to manage the digital images, it can
record, display or retransmit the images to anywhere in
the world.
The software package can easily be upgraded to allow for
analyzing data, selecting specificitems
to watch for and a host of other functions, making it a
truly customizable security tool.
True IP-based digital surveillance uses CCD cameras that
use signal processing that send packetized video streams
over the LAN through a Cat 5 cable rather than a coax
cable network, utilizing greater bandwidth and standard
TCP/IP communication.
It also provides more intelligent data mining and
information retrieval. If security is an issue, full
digital surveillance also offers the added advantage of
data encryption opportunities to protect against image
tampering -- something not possible with analog
recording.
The middle of the road of video surveillance is
upgrading video surveillance by utilizing a Digital
Video Recorder (DVR). A DVR system is not really fully
IP-based, but is step toward the more advanced IP
technology.
The leap into completely IP-based technology is the best
bang for your buck both monetarily and in terms of
security by far. Digital surveillance can be done over a
LAN network, of course, but TCP/IP transmittal of
surveillance makes sense for remote monitoring of
multiple locations and for remote recording of data onto
back-up servers and hard disks for long-term storage.
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