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Signal to noise ratio (s/n ratio)
| CCTV glossary (глоссарий терминов по видеонаблюдению) |
This is the ratio between the signal strength and the noise levels on an audio or video signal.
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Network camera, английский
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.
Television lines (tvl), английский
This is a measure of the resolution of a video device. the higher the number, the higher the resolution is. 380 tvl is considered medium resolution. 480 tvl or greater is considered high resolution.
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