SALES GUIDE Axis Communications
AXIS 2420 Network Camera
Rev: 1.1, Latest update: 2001-06-05
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9.4 Public Services – Community Policing
Many traditional CCTV systems that employ ISDN as
a mode of image transmission often connect via a
complex network of cables that need to be dug under
roads and public footpaths.
In urban areas troubled by the problems of rising
crime, the time and cost of installing ISDN cabling
infrastructure is expensive and time consuming – but
more importantly, the physical road works also serve
criminals with advance warning of an imminent
CCTV installation.
IP-based surveillance technology lends itself well to wireless network solutions that allow
cameras to be moved to where they are most needed quickly and easily.
Example:
www.axis.com/documentation/casestudie/camera/goodwin.pdf
10 Why not other digital solutions?
10.1 Standard analog CCTV cameras
Although there exist many new advanced imaging products available on the market, the
ubiquitous analogue video camera can still be regarded as a dominant rival product to the AXIS
2420. It is estimated that over 2 million CCTV cameras will be sold to the industry this year.
Standard analog cameras produce composite video signals that are typically saved on to
magnetic tape media that deteriorates with time and demands lots of physical storage space.
These types of camera can connect to a workstation installed with a dedicated video
'framegrabber' card
The main factor that differentiates the AXIS 2120 Camera against any analog camera is that it
contains a much higher level of functionality; i.e. because it includes it’s own Web server it can
connect and transmit images directly on a TCP/IP network and can be remotely configured and
managed and monitoring using Web/based tools.
10.2 PC-based Solutions
Requiring dedicated software for encoding/decoding images and controlling the network
interface, the remote viewing end also needs a PC. Relatively expensive, these products still
find favor in the surveillance industry and are common for use within group videoconferencing
applications.
10.3 Wavelet compression
Optimized for images containing low amounts of data. The relatively inferior image quality is
offset against the low bandwidth demands on the transmission medium.
