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Open AccessArticle

A Novel Scheme for Single-Channel Speech Dereverberation

Electrical and Computer Engineering Department, Democritus University of Thrace, 67100 Xanthi, Greece
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Acoustics 2019, 1(3), 711-725;
Received: 11 June 2019 / Revised: 20 August 2019 / Accepted: 29 August 2019 / Published: 5 September 2019
This paper presents a novel scheme for speech dereverberation. The core of our method is a two-stage single-channel speech enhancement scheme. Degraded speech obtains a sparser representation of the linear prediction residual in the first stage of our proposed scheme by applying orthogonal matching pursuit on overcomplete bases, trained by the K-SVD algorithm. Our method includes an estimation of reverberation and mixing time from a recorded hand clap or a simulated room impulse response, which are used to create a time-domain envelope. Late reverberation is suppressed at the second stage by estimating its energy from the previous envelope and removed with spectral subtraction. Further speech enhancement is applied on minimizing the background noise, based on optimal smoothing and minimum statistics. Experimental results indicate favorable quality, compared to two state-of-the-art methods, especially in real reverberant environments with increased reverberation and background noise. View Full-Text
Keywords: one-microphone dereverberation; reverberant-noisy speech enhancement; sparse coding; spectral subtraction one-microphone dereverberation; reverberant-noisy speech enhancement; sparse coding; spectral subtraction
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Kilis, N.; Mitianoudis, N. A Novel Scheme for Single-Channel Speech Dereverberation. Acoustics 2019, 1, 711-725.

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