Video Surveillance Glossary of Terms [N - O]

A   B   C   D   E   F   G - H   I - J   K - L   M   [N - O]   P   Q - R   S   T - U   V   W - X - Y - Z  

• » Network Camera [top]
  Also known as a Network IP Camera, this is a stand-alone camera that uses a standard web-browser to view live, full motion video from a computer network, including over the Internet.  They often feature an embedded OS (operating system) and features like:  FTP of images, web server capability, and built-in motion detection.
  
• » Neutral Density Filter [top]
  This category of lens filter reduces light of all wavelengths in equal amounts.
  
• » NTSC (National Television Standards Committee) [top]
  The NTSC represents the American and Japanese standard television video signal format of 525 picture lines and a 60Hz field frequency.
  
• » NVR (Network Video Recorder) [top]
  Functionally similar to a DVR, a NVR also accepts IP camera inputs.  NVRs can be software based, making them suitable only for accepting IP camera streams over the Internet.
  
• » Ohms [top]
  These are units that measure the impedance or resistance of an electrical device.
  
• » Optical Filters [top]
  These filters selectively allow for different frequency light to pass through.
  
• » Oscilloscope [top]
  This troubleshooting device translates electrical signals into voltage versus time based waveforms that are displayed onscreen, allowing visual feedback when adjusting CCTV components.
  
• » Outdoor Camera Housing [top]
  A protective shell for security cameras to be placed in outdoor environmental conditions, these housings typically include cooling fans for summer use and heaters for winter use. The heaters also eliminate fogging of the glass anytime this occurs.
  
• » Outdoor Dome Housing [top]
  This housing is dome shaped for insertion of dome security cameras, is very tamper resistant, and allows for PTZ.

Web Video-Surveillance-Guide.com