How IP-based video surveillance works: far beyond analog

When looking for an IP-based video surveillance system, you’ll need to be especially careful about exactly what you’re looking at and what the individual terms mean. The way IP-based video surveillance works is open to interpretation when it comes to some security and video surveillance vendors, not because they are trying to confuse the issues, but because there is no genuine consensus on what the term “IP-based” means. on IP”. or related as “networked” or “web-based” media.

Originally, video surveillance was carried out on the basis of analog technology, closed
circuit television (CCTV) and videotape recording. This was fine for
recorded what was going on, but didn’t broadcast real live information, so
it was not practical for monitoring stores, for example, from a remote location.
It just provided what happened after the fact. The image quality was not
great and also depended on human reliability – someone had to remember
change the tapes regularly, etc.

Digital revolutionizes video surveillance

With the Internet revolution and the growing presence of Local Area
Networks, technology made great strides in video surveillance in the 1990s.
Analog camera tubes were replaced by CCD (Charged Coupled Devices) and digital
Cameras became affordable for most people.

This combination meant that video surveillance could do two things: broadcast live
over the Internet or a closed network for surveillance and provide more clear,
sharper images that could be easily traced and manipulated. by law
law enforcement, digital surveillance meant it was much easier to zoom in on images,
track particular scenes and enhance functions.

The basics of IP-based surveillance

A digital camera “sees” the scene in front of it, transmits the video
images as a digitized signal over a LAN (Local Area Network) line where
it is then transmitted to a computer or server. The server in turn manages all this
information. Depending on the software used to manage digital images, it is
you can record, display or broadcast the images anywhere in the world.

The software package can be easily upgraded to enable data analysis,
selecting specific “marked” items to watch and a host of other functions,
making it a truly customizable security tool.

True IP-based digital surveillance uses CCD cameras that use signals
processing that sends packetized video streams over the LAN over a Cat 5 cable
instead of a coaxial cable network, using higher bandwidth and standard
TCP/IP communications.

It also provides smarter data extraction and information retrieval. Yew
security is an issue, full digital surveillance also offers the added benefit
of data encryption opportunities to protect against image tampering, something
not possible with analog recording.

Recently, some companies such as D-Link and Linksys have also fully developed
digital cameras that actually have fully integrated built-in web servers
so no external computers are needed for its operation. the sign is
it is transmitted directly to the terminal location for storage or playback.

Halfway…

The “middle of the road” of video surveillance is the video update
surveillance through the use of a digital video recorder (DVR). A DVR system is not
entirely IP-based, but it is a step towards more advanced IP technology. In
news, a DVR system uses the same camera and wiring structures as the
older analog CCTV systems, but old VCRs have been replaced by DVRs to
data storage. The data is converted to digital so that it can be stored.
on hard drives, but the quality of the captured images remains analog as this
It’s how it originated.

When purchasing a system, be sure to ask if the system is digital based on
the recording (DVR) or on the camera, since many manufacturers consider a system
under the DVR storage system even if the camera that records the
the images are still analog.

going all the way

Some people will switch to hybrid models of a CCTV/DVR system when
first go beyond an analog system because it seems to be the next practical
evolutionary step in video surveillance. However, switching to this method
It largely ignores how IP-based video surveillance works.

With CCTV/DVR surveillance, you have simply delayed the inevitable by
add a relatively new technology (hard drive, digital storage) to an old one
technology (analog video over coaxial transmission lines). instead of moving
towards something new, has prolonged the disappearance of the old.

Advantages of IP-based video surveillance

Leap to full 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, of course, but the TCP/IP watchdog transmission does
sense for remote monitoring of multiple locations and for remote recording of
data on backup servers and hard drives for long-term storage.

With IP-based video surveillance, you can connect your surveillance camera or
cameras to any network or wireless adapter, and you are extremely flexible in
the placement of the camera itself. A typical video camera connected to a PC, while
providing digital image image quality, it still has to be within approximately
ten feet from the computer itself.

Setting up an IP-based video system is easy: once you’ve set up an IP
steering, it is working and extremely stable and reliable. Because
this is the technology of the future, it is also upgradeable. You will not be
outperforming an IP-based video surveillance system in the short term because the new
developments are based on improving this market. Therefore, you can
add and improve this system for years to come, while older CCTV + DVR hybrids
it will hit a dead end and become obsolete.

Comparison of analog and IP-based video surveillance

A better way to understand the differences between analog and IP-based video
monitoring can be comparing the two and how they work:

Analog video surveillance or CCTV+DVR


o Easy to use: works like a video recorder

o Changing cassettes and rewinding them regularly means human error frequently interferes with effectiveness

o Image quality is poor

o Storage tapes wear out over time

o Streaming live images is not practical

o Storage is bulky

o Uses analog recording, low-grade image quality recording, and inability to easily search and trace

o Addition of DVR systems must be done in 16 channel ‘blocks’

IP-based video surveillance


o IP-based recording means instant transmission of images anywhere in the world

o You can monitor multiple cameras from a remote location

o No decrease in recording quality over time or with repeated replays

o Digital image quality much higher than analog

o IP-based recording is highly compressed for easy storage and can be transported over a variety of media

o Digital images may be encrypted for security purposes.

o Updates and add-ons are relatively inexpensive through software packages and Internet computer networks.

o Adjustable frame rates

o Remote viewing or sharing can be done over the Internet or a wireless connection

o Standard IP video compression techniques are used

o IP surveillance cameras can be added individually or in groups according to your needs

If you’re thinking of upgrading or upgrading video surveillance for your
business or home, understanding how IP-based video surveillance works will make
your decision easier. It is the future of video surveillance and, although
the short term can be a little more expensive, it is obviously an investment in
Superior quality and flexibility.

This article on “How IP-Based Video Surveillance Works” reprinted with
permission.

Copyright © 2004-2005 Evaluateek Publishing.

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