A determination of how much noise is present relative to the signal's strength. If the ratio of signal to noise is high, the signal is much stronger than the noise. A lower ratio means there is likely a lot of noise on the line.
The ratio of video signal to noise. This is a measure of how much signal noise the camera can withstand and still present a good image. The higher this number is, the better the picture quality.
The ratio between the strength of the desired speech signal and that of introduced noise, expressed in decibels. At 0 dB the two are of equal strength; negative values are associated with loss of intelligibility due to masking. Positive values are usually associated with better intelligibility. Return to