Masashi Unoki, Masakazu Furukawa, and Masato Akagi,
"A method for recovering the power envelope from the reverberant speech based on MTF," Proc. of Forum Acusticum Sevilla 2002, SPA-Gen-002, p. S129, Sevilla, Spain, Sept. 2002.
| Abstract |
This paper proposes a method for dereververating the power envelope from reverberant speech. This method is based on the concept of the modulation transfer function (MTF) and does not require that the impulse response of an environment be measured. It improves upon the basic model proposed by Hirobayashi et al. regarding the following problems: (i) how to precisely extract the power envelope from the observed signal; (ii) how to determine the parameters of the impulse response of the room; and (iii) application of the MTF to speech and the anti-co-modulation characteristic of the speech envelope. We, then, propose the extended method on the filterbank for applications, based on the three improvements. We have carried out $15,000$ simulations of dereverberation for reverberant speech signals. As results, it was shown that the proposed model can accurately dereverberate the power envelope from reverberant speech. |
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