The invention relates to an echo canceling device and method for an
arrangement for transmitting audio signals, in particular uttered speech
with an echo filter for canceling echo. The echo filter is arranged
between an input channel (1) and an output channel (4). The input channel
(1) leads a first electrical input signal to a converter (2) for
converting the electrical signal into a first audio signal. The output
channel (4) transmits an electrical signal from a converter (3) which
converts a second audio signal back into an electrical signal. In order
to prevent non-linearly distorted echo in such an echo canceling device
or method, a high-pass filter (8) is arranged in the input channel (1)
which high-pass filter (8) has a cut-off frequency that is beyond the
cut-off frequency of the high-pass behavior in the converter (2). The
high-pass filter (8) is followed by a limiting element (9) which limits
the amplitude of the input signal to the input range of the converter
(2). By this means, non-linear behavior in the converter (2) is prevented
so that non-linearly distorted echo cannot arise at all.