CCTV CLOSED-CIRCUIT TELEVISION (CCTV

CCTV SYSTEMS CCTV 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. CCTV systems have cameras linked to a video controller and users have the access control tools like badges, tokens, or fobs connected directly to the identity and access management system. Major use of CCTV is in powerful continuous surveillance system. Today’s modern CCTV comes along with Digital video Recorders [DVRs]. CCTV cameras have with two types of video recorders (i) DVR - Digital video recorder and (ii) NVR - Network video recorder that comes generally with IP cameras. CCTV – Types Bullet: A bullet CCTV camera is a wall-mount or ceiling-mounted unit that is typically designed for indoor use, but can also be fill some outdoor applications. Dome: A dome cameras get their name from the dome-shaped housing in which they sit. These housings are designed to make the cameras unobtrusive not covert or hidden. Typical applications are retail, where the camera is designed to be unobtrusive, but visible. Covert/Desktop/Board Cameras: These tiny cameras are well suited for desktop use for Skype and other low-resolution teleconference applications. Discreet Cameras: These are just some of the disguises for covert The covert cameras can also be characterized by conventional cameras placed in discreet locations. Infrared/Night Vision: These night-vision cameras have the ability to see images in pitch black conditions using IR LEDs. In some cases they are for mobile applications. Outdoor: The key to outdoor cameras is the housing itself, which must be impenetrable to moisture, insects, dust and other elements. Day/Night: Day/night cameras compensate for varying light conditions to allow the camera to capture images. These are primarily used in outdoor applications where the security camera is positioned for an outdoor parking lot. Varifocal: A camera with a varifocal lens allows the operator to zoom in or out while still maintaining focus on the image. Network/IP: These cameras, both hardwired and wireless, transmit images over the Internet, often compressing the bandwidth so as not to overwhelm the web. IP cameras are easier to install than analog cameras because they do not require a separate cable run. Wireless: The wireless cameras are, IP cameras that use alternative mode of wireless transmission. Irrespective of the transmission method, the primary benefit to these units is extreme flexibility in installation. PTZ/Speed Domes: Pan/tilt/zoom cameras give the surveillance operator the ability to move the camera left or right (pan); up and down (tilt); and zoom the lens closer or farther. These are relegated to surveillance situations where there is an actual live guard or surveillance specialist monitoring the images. High-Definition Cameras: Ultra high-definition cameras are often relegated to niche markets, such as casinos. These give the operators the ability to zoom in with extreme clarity (to look at poker players, for example, who might have something up their sleeve).