A two-stage algorithm for one-microphone reverberant speech enhancement

Authors:
Mingyang Wu;DeLiang Wang
Affiliations:
Fair Isaac Corp., San Diego, CA, USA;-
Venue:
IEEE Transactions on Audio, Speech, and Language Processing
Year:
2006

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Abstract

Under noise-free conditions, the quality of reverberant speech is dependent on two distinct perceptual components: coloration and long-term reverberation. They correspond to two physical variables: signal-to-reverberant energy ratio (SRR) and reverberation time, respectively. Inspired by this observation, we propose a two-stage reverberant speech enhancement algorithm using one microphone. In the first stage, an inverse filter is estimated to reduce coloration effects or increase SRR. The second stage employs spectral subtraction to minimize the influence of long-term reverberation. The proposed algorithm significantly improves the quality of reverberant speech. A comparison with a recent enhancement algorithm is made on a corpus of speech utterances in a number of reverberant conditions, and the results show that our algorithm performs substantially better.