Closed circuit TV or CCTV is closed as video cameras are used to send pictures to a group of screens in a specific location. These CCTV cameras are intentionally located in an area usually motivated by security and reconnaissance. CCTV cameras have moved from commercial use to domestic use. Home security systems are turning into a home that needs to be closed by alarms and smoke alarms.
CCTV security systems advanced with innovation today. Clear surveillance cameras with highly contrasting images demonstrated an approach to first-class shading cameras that can zoom in or out. Another progress is the computation and capacity of information using DVRs.
The DVR security camera can record for a very long time by specifying, for example, the location of the movement and the internal impulse that allows it to operate completely without anyone else. Another improvement in CCTV systems is the use of a web agreement (IP) to transmit records via information arranged in advanced organization. IP security camera allows to scan the movie film on the web through a computer or 3G phone.