A video surveillance camera is known to be the closed-circuit television which transmits the signal and used as a video camera. The video cameras are needed in banks and stores. The video cameras are used to observe the activities are happening in the product or the places where security is needed. The observation or attention could be needed at the place where the production occurred and, in the banks, as well as the stores. So, security cameras are needed in every public place where every individual has their right to enjoy freedom. From the central room, the footages of the security cameras are monitored about unwanted situations. Closed-circuit security cameras are used to monitor a particular event or to monitor continuously. The digital video recorder is the most advanced level of closed-circuit television. The digital video recorder has a variety of quality and it performs for a long time.

History of closed-circuit television:

Russian physicist Leon Theremin invented the mechanical closed-circuit television in the year 1927 in the Soviet Union. The Soviets of Labor and Defense requested the manual operation of video cameras. In 1949 the closed-circuit television system was available in the U.S.

The technology of closed-circuit television:

In the early times, closed-circuit television is needed to be monitored eventually over a long period because there is no technology of recording and saving the data that is monitored. The recorded footage of the surveillance camera is enabled with the development of reel to reel the media. The reel of magnetic tape could be manually replaced for a particular period. The replacement is with time consumption and also it was an unreliable process and expensive. From the year 1970 video caste recorder was available in the market and it was the much easier way to record the data which is monitored and also the recorded data could be easily erased. And the development makes the closed-circuit television much more common in the period. The development of digital multiplexing in the year 1990 is the easiest way of recording and it saves time and money, makes the wide use of closed-circuit television cameras.

Traffic stream monitoring:

To detect the overcrowding and to detect the accidents in the road traffic we could use the security cameras in the motorway networks in all the cities. These were not used as speed cameras but these were used to monitoring the traffic and the other issues happening in the motorways. And the closed-circuit television is used to monitor the unwanted issues happening in the public places and whether any situations are disturbing the privacy of the public. Over a particular period, the number of security cameras in the active traffic management system gradually got developed. In the public transports to the security cameras are installed for the security of the passengers. Especially in the one-man operation transports that is the transport with only one driver without any other persons, there the security cameras are installed to allow the driver to close the door and make a move after the confirmation with there is no other people near the door and allow him to carry on.