Home Security System Terms

Term
Definition
Auto Iris A practical feature of cameras that compensates for variations in light levels.

Resolution

Obviously the higher the resolution the better the quality. Typical solutions run around 350 TV lines of resolutions but options of up to 800 are available.
Infrared camera Typically used in surveillance cameras located in areas of low light. These cameras use an infrared LED that illuminates the scene.
IP Camera The camera’s video signal is transferred over an IP network. The camera digitizes the image and sends it over your network, similar to VoIP services. 
Wireless Systems

Wireless systems are typically suited for IP cameras and have transmission signals that can be carried out to both 2.4 to 5GHZ devices.

Video streaming
Analog and IP cameras both offer the ability to stream video. Involving the compressing of multimedia content over the Internet in a stream of packets. Bandwidth is the main determinant of video quality.
Closed Circuit Television Also known as CCTV. It refers the use of TV cameras for video surveillance. The images from CCTV cameras are not broadcasted and typically involve analog cameras and recording systems. CCTV came before the “digital era” of surveillance.

Smart monitoring
DVR can be set to take one picture per second to create a record, but when motion is detected it switches to running at a full 30 frames per second.

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