The invention provides an apparatus and method for bulk delay insertion prior
to echo cancellation, with echo suppression. The exemplary apparatus embodiment
(100) bandpass filters (120) and down samples (130), by a
down sampling factor, a reference signal and a combined signal that includes an
echo of the reference signal. An adaptive echo delay filter (140) determines
a plurality of filter coefficients, using the down sampled reference signal, and
using an error signal formed as a difference between the down sampled combined
signal and the adaptive echo delay filter output. When the filter coefficients
have converged, an echo delay time period is determined as a product of the tap
location of the maximum filter coefficient and the down sampling factor. When the
echo delay time period is greater than the capacity of an associated echo canceller,
an adaptive delay inserter (110) inserts the echo delay time period prior
to echo cancellation. Following insertion of the delay, echo suppression (170)
is implemented while the echo canceller retrains with the new, inserted delay.