Coherence is a frequency-domain measure of common (i.e. statistically linearly dependent) spectral components between the input and output of a system. Coherence loss indicates the cumulative effect of noise, nonlinear distortion, and time-base distortion. Using appropriate digital signal processing techniques it is possible to isolate and measure these three forms of signal degradation. All linear distortions are also predictable.

Authors: Totzek, U.; Preis, Douglas
Affiliation: Ruhr University, Bochum, W-Germany
AES Convention: 77 (March 1985) Paper Number: 2177
Publication Date: March 1, 1985

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