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Axis network camera-based system |
An analog camera-based system |
Access |
As
open or closed access as needed. Remote access to live
images and remote administration of a network camera are
possible from anywhere using a standard Web browser on
any PC. |
Closed circuit. No possibility for remote access. |
Ease of use |
- You can administer
and view the images remotely using a standard Web
browser on any PC.
- Images can be recorded on a hard disk, enabling
easy search possibilities, easy storage and no image
degradation or wear.
- The hard disk can be located at a remote location
for security purposes. |
- Remote
administration or monitoring is not possible.
- Images must be stored on video tape cassettes,
which require constant changing and lots of storage
space. The quality of recorded images deteriorate over
time.
- The video cassette recorder must be located near
the camera. This could potentially enable unauthorized
persons to have access to the video tape. |
Quality |
Digital images do not lose quality in
transmission or storage. A digital picture is created
using Motion-JPEG. Once created, the image is free from
degradation. Each frame within a video stream is
sharp. |
Image quality is lost when using long cables
and the resolution of a magnetic tape is normally quite
low. In addition, the quality of the recorded video
deteriorates over time. |
System
requirements |
Everything needed to
stream live video over networks is included in the
network camera. Simply connect the network camera to a
network. View, record and administer from any networked
PC (located anywhere). |
Connection to a
coaxial cable, to a multiplexer, to a video or time
lapse recorder, and to a locally placed CRT (cathode ray
tube) monitor. |
Installation |
Simply connect a network camera to the nearest network connection and assign an IP address. |
Attach a coax cable to each and every camera and connect to the multiplexer. |
Cabling |
One standard UTP (unshielded
twisted pair) network cable can forward images from
hundreds of network cameras simultaneously. |
One cable can
transport video signals from only one camera at a time.
If you have two cameras, you have to have two cables.
This often means large cable trunks filled with thick
and sensitive cables that are connected to a locally
placed control room. |
Scalability |
Adding more network cameras to the system is easy. |
Very difficult. Each analog camera requires its own cable. Image quality is lost when using long cables. |
Cost |
A high quality
network cable typically costs 30 to 40 percent less than
a standard coaxial cable.
A network cable can also support hundreds of network
cameras and other devices.
An IP-based network infrastructure is often already
in place, which means the cost is reduced to only that
of the network camera(s). |
Expensive coaxial
cables. A classic RG59 75 Ohms coaxial cable typically
costs 30 to 40 percent more than a high quality network
cable.
In addition, more cable is required. Each analog
camera requires its own cabling.
High labor and maintenance demands, plus cost of the
analog camera(s), DVR video tape recorder and video tape
cassettes. |
