This paper proposes a speech dereverberation method based on the MTF
concept. This method can be used without measuring the impulse response
of room acoustics. In the model, the power envelopes and carriers are
decomposed from a reverberant speech signal using an $N$-channel
filterbank and then are dereverberated in each respective channel. In
the envelope dereverberation process, a power envelope inverse filtering
method is used to dereverberate the envelopes. In the carrier
regeneration process, a carrier generation method based on
voiced/unvoiced speech from the estimated fundamental frequency (F0) is
used. In this paper, we assume that F0 has been estimated accurately. We
have carried out 15,000 simulations of dereverberation for reverberant
speech signals to evaluate the proposed model. We found that the
proposed model can accurately dereverberate not only the power envelopes
but also the speech signal from the reverberant speech using regenerated
carriers.
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