How Ip-based Video lookout Works -- Way Beyond Analog | Digital Photo Frame
When you're shopping around for an Ip-based video guard 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 guard works is open to interpretation as far as some video guard and safety salespeople are involved -- not because they are trying to confuse the issues, but because there is no genuine consensus on what the term "Ip-based" or associated ones such as "networked" or "web-based" means.
Originally video guard was done based on analog technology -- ended
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 picture capability wasn't
great and it relied on human reliability as well -- man had to remember to
change the tapes regularly, etc.
Digital revolutionizes video guard
About Digital Photo Frame
With the Internet revolution and the ever-increasing presence of Local Area
Networks, technology took great strides in video guard in the 1990's.
Analog camera tubes were replaced with Ccd (Charged Coupled Devices) and digital
cameras became affordable for most people.
This composition meant that video guard could do two things: go live
over the Internet or a ended network for guard and provide clearer,
crisper images that could be tracked and manipulated easily. For law
enforcement, digital guard meant it was much easier to zoom in on images,
track particular scenes and enhance features.
The basics of Ip-based guard >
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 as a matter of fact be upgraded to allow for analyzing data,
selecting specific "flagged" items to watch for and a host of other functions,
making it a truly customizable safety tool.
True Ip-based digital guard 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 approved
Tcp/Ip communication.
It also provides more enthralling data mining and information retrieval. If
security is an issue, full digital guard also offers the added benefit
of data encryption opportunities to protect against image tampering -- something
not potential with analog recording.
Recently, a few companies such as D-Link and Linksys have also developed fully
digital cameras that as a matter of fact have thoroughly integrated, built-in web servers
so that no external computers are needed for operating them. The signal is
transmitted directly to the final location for storage or play-back.
Halfway there...
The "middle of the road" of video guard is upgrading video
surveillance by utilizing a Digital Video Recorder (Dvr). A Dvr law is not
really fully Ip-based, but is step toward the more developed Ip technology. In
actuality, a Dvr law uses the same camera and structures for cabling as the
older Cctv analog systems, but the old Vcrs have been replaced with Dvr for
storage of the data. The data is converted to digital so that it can be stored
on hard disks, but the capability of the images captured remains analog since this
is how it originated.
When shopping for a system, be sure to ask if the system is digital based on
the recording (Dvr) or on the camera, since many manufacturers reconsider a system
digital by virtue of the Dvr storage law even if the camera recording the
images is still analog.
Going all the way
Some habitancy will move to the hybrid models of a Cctv/Dvr law when they
first move beyond an analog law because it seems like the next practical
evolutionary step in video surveillance. However, shifting to this method
largely ignores how Ip-based video guard works.
With Cctv/Dvr guard you have as a matter of fact plainly delayed the inevitable by
adding on a relatively new technology (hard disk, digital storage) to an old
technology (analog video over coaxial transmission lines). Rather than enthralling
forward into something new, you have prolonged the demise of the old.
Advantages of Ip-based video guard
The leap into thoroughly Ip-based technology is the best bang for your buck
both monetarily and in terms of safety by far. Digital guard can be
done over a Lan network, of course, but Tcp/Ip transmittal of guard makes
sense for remote monitoring of complicated 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 join together your guard camera or
cameras to any network or wireless adapter, and you are highly flexible in
your placement of the camera itself. A typical Pc-attached video camera, while
providing digital picture image quality, still has to be within practically
ten feet of the computer itself.
Set-up of an Ip-based video law is easy -- once you've set up an Ip
address, you're up and running and it's highly garage and reliable. Because
this is the technology of the future, it is also upgradeable. You won't be
outgrowing an Ip-based video guard law any time soon because new
developments are based on improving this market. Therefore, you will be able to
add on and enhance this law for years to come while older, Cctv+Dvr hybrids
will dead-end and become obsolete.
Comparing analog and Ip-based video guard
A great way to understand the differences between analog and Ip-based video
surveillance may be to compare the two and how they work:
Analog or Cctv+Dvr video guard
o Easy to use -- operates like a Vcro Changing cassettes and rewinding usually means human error oftentimes interferes with effectiveness
o Image capability is poor
o storage tapes wear out over time
o Broadcasting images live isn't practical
o storage is bulky
o Uses analog recording, recording in low-grade picture capability and inability to quest and track easily
o Adding Dvr systems must be done in 'blocks' of 16 channels
Ip-based video guard
o Ip-based recording means instant transmittal of images anywhere in the worldo Can monitor complicated cameras from one remote location
o No decrease in recording capability over time or with repeated replays
o Digital picture capability far excellent to analog
o Ip-base recording is highly compressed for easier storage and can be conveyable over a range of media
o Digital images can be encrypted for safety 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 approved Ip video compression techniques are used
o Ip guard cameras may be added individually or in groups according to your needs
If you are contemplating increased or upgrading video guard for your
company or home, understanding how Ip-based video guard works will make
your decision easier. It is the time to come of video guard and, although in
the short term may be a bit more expensive, is obviously an venture in
superior capability and flexibility.
This narrative on "How Ip-based Video guard Works" reprinted with
permission.
Copyright © 2004-2005 Evaluseek Publishing.
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How Ip-based Video lookout Works -- Way Beyond Analog | Digital Photo Frame
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