Refinement of an MTF-based speech dereverberation method using an optimal inverse-MTF filter
نویسندگان
چکیده
We previously proposed a speech dereverberation method based on the modulation transfer function (MTF). This method consists of power envelope restoration and carrier regeneration processes, and reduces both the loss due to degraded power envelopes and the loss of speech intelligibility. In the power envelope restoration, however, whether adaptive time-frequency division provides the best representation is still uncertain and the improvement in restoration accuracy tends to lessen as the reverberation time drastically increases. In this paper, with regard to these issues, we explain how the power envelope restoration can be improved and show that power envelope inverse filtering can be redesigned as an optimal inverse MTF.
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Development of the MTF-based speech dereverberation method using adaptive time-frequency division
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