A method to eliminate discontinuities in an adaptively filtered signal
includes filtering a beginning portion of a current signal frame using a
past set of filter coefficients, thereby producing a first filtered frame
portion. The method also includes filtering the beginning portion of the
current signal frame using a current set of filter coefficients, thereby
producing a second filtered frame portion. The method also includes
modifying the second filtered frame portion with the first filtered frame
portion so as to smooth a possible filtered signal discontinuity between
the second filtered frame portion and a past filtered frame produced
using the past filter coefficients.