A speech dereverberation method based on the MTF concept in power envelope restoration
スポンサーリンク
概要
- 論文の詳細を見る
We previously proposed an improved method for restoring the power envelope from a reverberant signal, based on the modulation transfer function (MTF) concept in order to resolve the problems of Hirobayashi’s method. In this paper, to apply our improved method to reverberant speech, we consider three issues related to speech applications: (i) how to apply the improved method to speech dereverberation based on co-modulation characteristics; (ii) whether the MTF concept can also be applied in the sub-band for reverberant signals; and (iii) whether power envelope inverse filtering should be done separately in each channel. We propose an extended filterbank model based on these considerations. We have carried out 15,000 simulations of the power envelope restoration for reverberant speech signals, and our results have shown that the proposed model can adequately restore the power envelopes in all channels from reverberant speech signals. We also found that the estimation of the reverberation time should be done separately in each channel to improve the restoration accuracy of the power envelope.
- 社団法人日本音響学会の論文
著者
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Unoki Masashi
School of Information Science, Japan Advanced Institute of Science and Technology
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Akagi Masato
School of Information Science, Japan Advanced Institute of Science and Technology
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Akagi M
School Of Information Science Japan Advanced Institute Of Science And Technology
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Akagi Masato
School Of Information Sci. Japan Advanced Inst. Of Sci. And Technol. (jaist) 1-1 Asahidai Nomi Ishik
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Unoki Masashi
School Of Information Science Japan Advanced Institute Of Science And Technology
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Furukawa Masakazu
School Of Information Science Japan Advanced Institute Of Science And Technology:(present Address)fu
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Sakata Keigo
School of Information Science, Japan Advanced Institute of Science and Technology
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Sakata Keigo
School Of Information Science Japan Advanced Institute Of Science And Technology:(present Address)de
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Unoki M
School Of Information Science Japan Advanced Institute Of Science And Technology
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Akagi Masato
School Of Information Sci. Japan Advanced Inst. Of Sci. And Technol.
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