January 27th, 2012 A Knoledgeable Breif Story About CCTV security Systems Past and Present
CCTV security systems were introduced within the US and the UK during the 60s and 70s.
CCTVsecurity systems are in excess of a thousand times superior to the basic camera and monitor configurations that first came out in the 1960s. Systems from the 60s were basic, composed of very low resolution black and white cameras connected by coaxial cable. Each camera was attached to a black and white monitor. A 16 camera configuration needed 16 monitors. New applications of camera security systems include : belowground trains and stations, sports stadiums, sales outlet, shopping center , public facilities, community parks, garages and parking lot .
CCTV Technology Evolution The basic technology evolved in the 60s. Firstly , cctv switch boxes were added. A switchbox would allow the operator to switch between cameras. Operators now could see multiple camera views on one monitor. Only one camera could be watched at once. The 70′s brought Multiplexers, VCRs and solid state cameras. Multiplexers allowed the screen to be broken into multiple frames on the same monitor. VCRs allowed straight forward recording and video dispersion. Solid state cameras assisted improve dependability and the integration of VCRs.’First generation’ CCTV security technology was impeded by some fairly major performance related problems .
In the 80s we determined that VCR recorders had many troubles. VCR recorders were erratic. The quality of the recordings was poor. The combination of low resolution camera images , poor quality video tapes and low tech solutions meant that grainy and ill defined images couldn’t be relied on even for conclusive recognition purposes.
VCR technology couldn’t allow the operator to review and record happenings at the same time and it was a very time consuming procedure to find and go over specific events .There was no motion sensing capability and no way of looking at events from a distant location.
Expensive for what you get Even though early CCTV systems supplied only relatively basic functionality and moderate performance , they were pricey – both in terms of the initial equipment cost and the installation . Since this is still a new growth industry, there is still a lack of qualified and trained installers.
The Next Generation CCTV security systems arrived in the mid 90s. The new technology was a computer founded Digital Video Recorder (DVR) DVRs allow images to be recorded at much higher resolution than previously . DVR eliminated a major trouble with first generation CCTV systems Video Tape! Worn out, forgot to change the tape, VCR recording tape.
DVRs are automatic and never necessitate user intervention. When it is time to look at recorded images, the DVR continues to tape. Images are clock time and date stamped and are very easy to review. DVRs using IP (Internet Protocol) technology allow authorized distant users to view , convey two way audio, fully command the cameras and system itself over a local area network (LAN), a wide area network (WAN) or on the internet . With such flexible access, the modern generation of CCTV cameras may be operated remotely from a control center or, in fact anywhere with internet access.
Equally, high quality digital images may be streamed anywhere and captured at a convenient and secure location. But it is n’t only the operating platform that has evolved significantly ; camera technology too allows far more functionality.
Today’s generation cameras can PTZ – pan, tilt and zoom, have higher resolution options, a large variety of lenses and are also capable of operating in ‘ scotopic vision. Audio is also now part of CCTV DVR technology. An operator is now able to sync movement based video events with audio analysis. Two way audio transmission allows the operator to query possible intruders , give instructions to staff and to record search replay in both audio and visual form. Next generation DDTV DVR systems are compatible with early camera technology, and are scaleable, flexible and can be incorporated with a broad range of other management systems, such as access control and building management systems.
CCTV has surely come a long way since the 1960s ; it’s clear that the future of CCTV is secure and that technology will continue to develop to meet the needs of the surveillance market.
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