CCTV and Cameras for all applications

CCTV - Closed Circuit Television ­ A television system used for private purposes and not for public or general broadcast.

What is CCD - Our video cameras are piece of technology and at the heart of it is the CCD (charge coupled device) imager chip. A CCD consists of several hundred thousand individual picture elements (pixels) on a tiny 1/2", 1/3", or 1/4" chip. Each pixel responds to light falling on it by storing a tiny charge of electricity. The pixels are arranged on a precise grid, with vertical and horizontal transfer registers carrying the signals to the camera's video processing circuitry. This transfer of signals occurs sixty times per second. The CCD camera's electronic shutter is not really a moving shutter, but a clever piece of signal processing. Under low light conditions, the CCD is allowed to gather signal for the full 1/60th of a second. Under brighter lighting conditions, the video processing chip automatically responds by reading the CCD and then immediately "early purging" it, resulting in precise control over the video level. Even at a shutter speed of 1/100,000 of a second, the CCD camera is still delivering 60 images per second, but each image is gathered over a much shorter period of time. It doesn't end with the CCD...the image is constantly monitored and optimised by advanced on board signal processing circuitry. The end result is a fantastic picture, with no fiddling, no adjustments, and best of all, unbelievable reliability.

PAL - Phase Alternate Line ­ Colour Video Signal standard for most of Europe, Australia and the Middle East - 625 Lines, 50Hz.

CCIR - Committee Consultative International Radio-communications. Monochrome Video Signal for most of Europe, Australia and the Middle East ­ 625 lines, 50Hz.