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Network camera-based system |
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.
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- 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.
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| 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).
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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), video tape recorder and video tape
cassettes.
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