A speech dereverberation method based on the MTF concept

摘要

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.