Glossary

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Term - N

Network :

A series of points or connection points interconnected by communication paths.

Noise :

Undesired signals that corrupt the original video signals and may reduce the image quality.

Network Camera :

This refers to a camera that is designed to record pictures and transmit them directly over a computer network or internet connection. Network Cameras normally do not have any analogue video outputs. The images are encoded directly in one of the standard compression techniques, such as JPEG or MPEG.

NTSC :

NTSC is an abbreviation for the National Television Standards Committee. The term "NTSC video" refers to the video standard defined by the committee, which has a specifically limited color gamut, is interlaced, and is approximately 720 x 480 pixels, and 30 frames per second (fps). This standard is used in North America.

NVR :

Network Video Recorder. A software or computer that records video on the hard disk. Like a DVR, it usually records digitally so the user can instantly search by time, date and camera. It collects video from network camera, network video server or DVR over the network.

National Television System Committee (NTSC) :

An analog color television standard used in North America and some of South America.

Network :

1) A series of IP Controllers, all connected via a communications cable.
2) A group of computers, all connected via a communications cable.

Normally-Closed :

The state of an input device that continually keeps a circuit closed or complete until forced by an action or event to open that circuit. See Input.

Normally-Open :

The state of an input device that continually keeps a circuit open or incomplete until forced by an action or event to close that circuit. See Input.

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