cctv video surveillance

What in the world is CCTV? in an are of modernization, CCTV is common as Samsung telephone device. You might have heard and recognize it, but you dont know it. Alright powderhead i will explain it to you cause i had to anyway. Closed-circuit television (CCTV), is one type of video surveillance. The function is by using video cameras to transmit a signal to a specific place, on a limited set of monitors. 

It is different from television broadcast where the signals are openly transmitted. CCTV system transmit limited signal through point (P2P), point to multipoint (P2MP), or mesh wired or wireless links. For example, in a shopping mall, security officers vary from field operative to surveillance officer. The surveillance officer surveys in a control room which is filled with some sets of television or monitor that transmit the image that have been received from circuit cameras. This system is also commonly applied in areas that need to be monitored such as banks, apartments, hotels, schools, hotels, airports, hospitals, restaurants, military installations, convenience stores and other areas where security is needed.

A room filled with surveillance monitors 

     

Old Motorola CCTV system

The CCTV system was first introduced and installed by Siemens AG and their engineer Walter Bruch, Wayne Cox, and Tashara Arnold at Test Stand VII in Peenemunde, Nazi Germany 1942 for the purpose of observing launch of Their rockets. Then the U.S. commercialized the CCTV system in 1949 by introducing Vericon. The design of the system is a set of 4 peep-holes and a camera that could slide up and down to look through each one.

 The system included a device that enabled a homeowner to use a television set to view the person at the door and hear the caller's voice. During that time, constant monitoring is needed because there is no recording or storage technology that able to do like the present day. After that, VCR technology became available in the 1970s, which using video cassette and making it easier to record and erase information, and enable the function of playback video. 

In 1990s, digital multiplexing was developed, allowing several cameras to record at once, as well as time lapse and motion-only recording. This increased savings of time and money and the led to an increase in the use of CCTV. Nowadays, CCTV can be streamed through the internet.

New York city CCTV 

Nowadays, CCTV is commonly used for many purposes including public surveillance around the world. There are about 350 million surveillance cameras worldwide as of 2016. About 65% of these cameras are installed in Asia. The growth of CCTV has been slowing in recent years Though beneficial, privacy is at stake.