The Change of CCTV

CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes. 

CCTV relies on strategic placement of cameras and private observation of the camera's input on monitors. The system is called "closed-circuit" because the cameras, monitors and/or video recorders communicate across a proprietary coaxial cable run or wireless communication link. 

With the development of science and technology, CCTV changed a lot. Older CCTV systems used small, low-resolution black and white monitors with no interactive capabilities. Modern CCTV displays can be high resolution color, providing the CCTV administrator with the ability to zoom in on an image or track something or someone. Moreover, you can speak to the camera surrounded person which means two way audio. And people also can choose HD Analog system or IP network system according to their preference.

The most common use of CCTV is in security camera systems. They’ve been found for years in areas like large retail shops, banks, and government institutions. Thanks to reduced costs in the manufacture of cameras and video recording equipment, camera systems are becoming more and more common place in smaller businesses, and even private homes.