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CCTV3000 - Closed Circuit Television

The CCTV3000 digital surveillance system is easily and economically installed and connected for local and (where required) distributed access, using inexpensive and available commercial computer hardware and existing Internet protocols.

Compared with earlier analogue-based CCTV systems, digital video systems provide full flexibility for installation, processing of data and transmission.

The system requires only a LAN cable and a power cable entering the PAN/TILT unit. The digital video and the control data is then transmitted via the network. Employing TCP/IP transmission eliminates the need for multiplexers or matrix switches, and reduces the amount of cabling signifficantly. Any PC with the CCTV3000 Display software installed can view the picture and control the camera. There is no limit to the number of users viewing the picture from any camera.


Standard computer monitors as screens.

   

Hardware
The system is based on the use of standard PC hardware and LAN systems. The camera (with wash/wipe) and high-resolution Pan- Tilt-Zoom (PTZ) units, are from existing suppliers. Any installed system can be easily and rapidly expanded because standard hardware modules are used.

Transmission Bandwidth
The digital video transmission protocol is based on TCP which adapts to network load. The protocol initially responds to variations in available bandwidth by adjusting the frame rate. The picture quality is optimized automatically by dynamic control of the compression process and resolution.

Pan/tilt unit with stepper motors
for extreme accuracy.

   

Data Recording and Playback
Video from each camera can be continuously recorded on the computer’s hard disc. Backup can be done by the use of magnetic tape or CD-ROM. Recording capacity can be extended by reducing the number of frames per second. At 3 frames/second, a large hard disc can store a week's video. The same disc recording video at 10 frames/second can store only two day's video. Frame rates can be set by the operator. Recorded video can remain on the operator's PC, or be transferred to a server. PTZ data is automatically stored with the video data. For automatic continuous recording, a low frame rate of 2 or 3 frames/second is usually chosen. When required to observe an intruder or for close inspection of a target under surveillance, the operator can select maximum frame rate. Video can be replayed on any PC display terminal which has the replay software installed. This is a valuable function for training, and for incident investigations.

Camera Control
The movement of the camera can be controlled in many ways in the CCTV3000 system. However, the basic method of controlling pan, tilt and zoom is by clicking directly on the picture. Clicking on the upper part of the picture will move the camera upwards, clicking on the left part of the picture will move the camera to the left etc. Zooming in and out is done with the scroll wheel on the mouse. Right clicking on the picture centers the camera to the viewing angle the operator clicked.

Mini Map
A MiniMap display enables the operator to point the camera at a geographical position selected by the mouse on the MiniMap. A vector displayed on the MiniMap shows the current camera bearing and distance to the centre of the camera picture.

Presets
An unlimited amount of presets can be stored. A preset is a position with saved values for pan, tilt, zoom and focus. Guard Tours A guard tour is a set of saved presets, where the camera will move automatically between the presets. The camera speed and time to dwell at each preset is configurable. This function allows the user to make guard tours, which for example pan slowly over the horizon or tours, which rapidly moves between different presets and displays each preset for a number of seconds.

Zooming Power
The following two series of screenshots illustrates the magnification power of one of our standard lenses. The lens is a 20x zoom lens with a field of view ranging from 46º at no zoom to 2.6º at maximum zoom.

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