Method 1 (IR switching)
lA very simple
idea: a different IR is employed depending on the amplitude of each sample of
the signal to be filtered
lThe method is
quite old: the first published papers are thoss of Bellini and Farina (1988)
and Michael Kemp (1999)
lSeveral impulse
responses are measured, employing test signals of different amplitudes, and
stored for later usage.
lIt is mandatory
to implement the convolution as direct form in time domain, as each sample has
to be processed with a different IR.