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Frequently Asked Questions

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Aberration Aberration. The term of optics, denotes all the effects that affect the fidelity of the image relative to the original scene.

AC alternating current.

Activity detection detection of activity. Available in somemotion detection function videomul′tipleksorah the connected cameras to increase the speed of updates.

AC/DC alternating current/direct current.

A/D a/d-Usually refers to analog-to-digital conversion.

AESAutomatic electronic shutter. Automatically adjusts the exposure time, with a bright Flash or fast motion, thus providing a quality image.

AGC-Automatic gain control automatic gain control

Alarminput for connection of TV monitoring system hardware alarms

ALC-Automatic light control light control auto

Aliasing aliasing

Amplitude -Amplitude peak value of the signal.

Anti-aliasing Anti-aliasing protection.

Aperture Aperture – aperture,controls the amount of light that reaches the surface of CCD sensor.

Artifacts Artifacts-unwanted items or video problems.

ASCII American standard code for information interchange

Aspect ratio aspect ratio-the ratio of the width of the television and motion video to its heights.

Aspherical lens , aspherical varifocal lens-lens with aspherical surface.

Astigmatism Astigmatism-blur on foreground and background.

Asynchronous Asynchronous-lack of synchronization. Video signal nesinhronizirovan, if it is different from the length of the referencethe signal system, the external video signal nesinhronizirovan until it will be processing the video frame Synchronizer.

Asynchronous transfer mode ATM asynchronous transfer mode. Transmission and switching signal method in which information is acyclic character in relation to a reference signal.

Attenuator Attenuator Circuit that provides lower-amplitude electricalwithout significant signal of phase or frequency distortion.

Attenuation Attenuation-reduction of amplitudesignal as its passage in your environment or electrical system. Is measured in decibels (DB).

Auto Irisautomatic method of Aperture changes in response to changes in illumination.

AVI. Audio Video InterleavedFormat multimedia files to store audio andvideo file format developed by Microsoft RIFF.


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