When you're shopping around for an Ip-based video lookout system, you will need to be particularly cautious about what exactly you're seeing at and what the individual terms mean. How Ip-based video lookout works is open to interpretation as far as some video lookout and security salespeople are implicated -- not because they are trying to confuse the issues, but because there is no genuine consensus on what the term "Ip-based" or linked ones such as "networked" or "web-based" means.
How Ip-based Video lookout Works -- Way Beyond Analog
Originally video lookout was done based on analog technology -- closed
circuit television (Cctv) and recording on video tapes. This was fine for
recording what was going on, but it didn't broadcast actual live information, so
it wasn't practical for monitoring stores, for instance, from a remote location.
It plainly provided what happened after the fact. The photograph quality wasn't
great and it relied on human reliability as well -- man had to remember to
change the tapes regularly, etc.
Digital revolutionizes video lookout
Backup CameraWith the Internet revolution and the ever-increasing proximity of Local Area
Networks, technology took great strides in video lookout in the 1990's.
Analog camera tubes were supplanted with Ccd (Charged Coupled Devices) and digital
cameras became affordable for most people.
This blend meant that video lookout could do two things: go live
over the Internet or a closed network for lookout and contribute clearer,
crisper images that could be tracked and manipulated easily. For law
enforcement, digital lookout meant it was much easier to zoom in on images,
track singular scenes and heighten features.
The basics of Ip-based lookout
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 conduct the digital images, it
can record, display or retransmit the images to everywhere in the world.
The software container can de facto be upgraded to allow for analyzing data,
selecting definite "flagged" items to watch for and a host of other functions,
making it a truly customizable security tool.
True Ip-based digital lookout 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 thorough
Tcp/Ip communication.
It also provides more lively data mining and data retrieval. If
security is an issue, full digital lookout also offers the added benefit
of data encryption opportunities to safe against image tampering -- something
not inherent with analog recording.
Recently, a few clubs such as D-Link and Linksys have also advanced fully
digital cameras that de facto have fully integrated, built-in web servers
so that no external computers are needed for operating them. The signal is
transmitted directly to the terminal location for warehouse or play-back.
Halfway there...
The "middle of the road" of video lookout is upgrading video
surveillance by utilizing a Digital Video Recorder (Dvr). A Dvr ideas is not
really fully Ip-based, but is step toward the more advanced Ip technology. In
actuality, a Dvr ideas uses the same camera and structures for cabling as the
older Cctv analog systems, but the old Vcrs have been supplanted with Dvr for
storage of the data. The data is converted to digital so that it can be stored
on hard disks, but the quality of the images captured remains analog since this
is how it originated.
When shopping for a system, be sure to ask if the ideas is digital based on
the recording (Dvr) or on the camera, since many manufacturers think a ideas
digital by virtue of the Dvr warehouse ideas even if the camera recording the
images is still analog.
Going all the way
Some people will move to the hybrid models of a Cctv/Dvr ideas when they
first move beyond an analog ideas because it seems like the next practical
evolutionary step in video surveillance. However, shifting to this method
largely ignores how Ip-based video lookout works.
With Cctv/Dvr lookout you have de facto plainly delayed the certain by
adding on a relatively new technology (hard disk, digital storage) to an old
technology (analog video over coaxial transmission lines). Rather than lively
forward into something new, you have continued the demise of the old.
Advantages of Ip-based video lookout
The leap into fully Ip-based technology is the best bang for your buck
both monetarily and in terms of security by far. Digital lookout can be
done over a Lan network, of course, but Tcp/Ip transmittal of lookout 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.
With Ip-based video surveillance, you can associate your surveillance camera or
cameras to any network or wireless adapter, and you are extremely flexible in
your placement of the camera itself. A typical Pc-attached video camera, while
providing digital photograph image quality, still has to be within roughly
ten feet of the computer itself.
Set-up of an Ip-based video ideas is easy -- once you've set up an Ip
address, you're up and running and it's extremely garage and reliable. Because
this is the technology of the future, it is also upgradeable. You won't be
outgrowing an Ip-based video lookout ideas any time soon because new
developments are based on enhancing this market. Therefore, you will be able to
add on and heighten this ideas for years to come while older, Cctv+Dvr hybrids
will dead-end and become obsolete.
Comparing analog and Ip-based video lookout
A best way to understand the differences between analog and Ip-based video
surveillance may be to correlate the two and how they work:
Analog or Cctv+Dvr video lookout
o Easy to use -- operates like a Vcro Changing cassettes and rewinding normally means human error frequently interferes with effectiveness
o Image quality is poor
o warehouse tapes wear out over time
o Broadcasting images live isn't practical
o warehouse is bulky
o Uses analog recording, recording in low-grade photograph quality and inability to hunt and track easily
o Adding Dvr systems must be done in 'blocks' of 16 channels
Ip-based video lookout
o Ip-based recording means instant transmittal of images everywhere in the worldo Can monitor multiple cameras from one remote location
o No decrease in recording quality over time or with repeated replays
o Digital photograph quality far first-rate to analog
o Ip-base recording is extremely compressed for easier warehouse and can be conveyable over a variety of media
o Digital images can be encrypted for security purposes
o Updates and add-ons are relatively reasonable through software packages and Internet computer networking
o Adjustable frame rates
o Remote or shared viewing may be done over the Internet or a wireless connection
o thorough Ip video compression techniques are used
o Ip surveillance cameras may be added individually or in groups agreeing to your needs
If you are contemplating increased or upgrading video lookout for your
company or home, insight how Ip-based video lookout works will make
your decision easier. It is the time to come of video lookout and, although in
the short term may be a bit more expensive, is obviously an speculation in
superior quality and flexibility.
This record on "How Ip-based Video lookout Works" reprinted with
permission.
Copyright © 2004-2005 Evaluseek Publishing.
>How Ip-based Video lookout Works -- Way Beyond Analog
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