Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, stores, and other areas where security is needed.
Types Of CCTV Cameras:
- Bullet Type Cameras are designed for capturing images in a fixed area. These cameras are recognized by their thin and cylindrical design. There are also classifications of Ultra Bullet distinguished by their smaller size and cheaper price.
- Dome Cameras, named after the shape of their housing is designed for in-store installations. It works in two ways as it is unobtrusive but visible, thus, it warns people that the area is protected by a CCTV network and gives comfort to its clients for its security.
- Infrared Cameras are designed for evening lookouts. It captures images with the help of its infrared lighting surrounding its lens.
- Varifocal Cameras are designed to allow zooming in and out without losing focus on the image.
- Network Cameras allow transmission of images through the internet or a local LAN with controlled bandwidth.
- Wireless cameras are cameras that may or may not be connected to the internet. These cameras use signalling devices to transmit images from camera to viewing area.
- PTZ Cameras or pan-tilt-zoom are cameras that can be moved. There are variations of these cameras that are programmable and are manually controllable. This allows viewers to have more freedom and control of viewing things.
Discreet Cameras are cameras in disguise, they could look like a fan or any other thing that would not seem suspicious in the area.