[citation needed] A frequently used method of decorrelation is the use of a matched linear filter to reduce the autocorrelation of a signal as far as possible.
[citation needed] For example, many transform coders first apply a fixed linear transformation that would, on average, have the effect of decorrelating a typical signal of the class to be coded, prior to any later processing.
Decorrelation techniques can also be used for many other purposes, such as reducing crosstalk in a multi-channel signal, or in the design of echo cancellers.
In neuroscience, decorrelation is used in the analysis of the neural networks in the human visual system.
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