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DEFINITION
CCTV (Closed Circuit Television)
TechTarget Contributor
What is CCTV?
CCTV (closed-circuit television) is a television system in which signals are not broadcast publicly but are monitored, primarily for surveillance and security purposes.
How does CCTV work?
CCTV relies on strategically placing cameras and monitoring camera input somewhere on monitors. Because cameras communicate with monitors and/or video recorders via private coaxial cables or wireless communication lines, they are labeled "closed circuit," meaning that access to their content is limited by design to only those who can see it.
CCTV use cases
Older CCTV systems used small, low-resolution black-and-white monitors with no interactive capabilities. Modern CCTV displays can be high resolution color displays and can include the ability to zoom in or track something (or someone) among their features. Talk CCTV allows a supervisor to talk to people within range of speakers associated with the camera.
CCTV is commonly used for a variety of purposes including:
Maintaining perimeter security in medium to high security areas and installations.
Monitoring the behavior of incarcerated persons and potentially dangerous patients in medical facilities.
Traffic monitoring.
Supervision of places that would be dangerous for humans, such as highly radioactive or toxic industrial environments.
Building and grounds security.
Obtaining a visual record of activities in situations where proper security or access controls must be observed (for example, when cutting or grading diamonds; in banks, casinos or airports).
CCTV is finding increasing use in law enforcement, for everything from monitoring traffic (and automated ticketing) to monitoring high crime areas or neighborhoods. Such use of CCTV technology has fueled privacy concerns in many parts of the world, particularly in those areas in the UK and Europe where it has become a routine part of police procedures.
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