title: Wavelet speech enhancement algorithm using exponential semi-soft mask filtering.
abstract: In this paper, we propose a new speech enhancement algorithm based on wavelet packet decomposition and mask filtering. In the traditional mask filtering such as ideal binary mask (IBM), the basic idea is to classify speech components as target signal and non-speech components as background noises. However, speech and non-speech components cannot be well separated in target signal and background noise. Therefore, the IBM has residual noise and signal loss. To overcome this problem, the proposed algorithm used semi-soft mask filter to exponentially increase. The semi-soft mask minimizes signal loss and the exponential filter removes residual noise. We performed experiments using various types of speech and noise signals, and experimental results show that the proposed algorithm achieves better performances than the traditional other speech enhancement algorithms.
authors.affiliation: a Department of Medical & Biological Engineering, Graduate School , Kyungpook National University , Daegu , Korea.
authors.forename: Gihyoun
authors.initials: G
authors.lastname: Lee
authors.affiliation: a Department of Medical & Biological Engineering, Graduate School , Kyungpook National University , Daegu , Korea.
authors.forename: Sung
authors.initials: S
authors.lastname: Dae Na
authors.affiliation: b Department of Biomedical Engineering , Kyungpook National University Hospital , Daegu , Korea.
authors.forename: KiWoong
authors.initials: K
authors.lastname: Seong
authors.affiliation: c School of Electronics Engineering, College of IT Engineering, Kyungpook National University , Daegu , Korea.
authors.forename: Jin-Ho
authors.initials: JH
authors.lastname: Cho
authors.affiliation: d Department of Biomedical Engineering, School of Medicine , Kyungpook National University , Daegu , Korea.
authors.forename: Myoung
authors.initials: M
authors.lastname: Nam Kim
mesh_terms: D000465:Algorithms; D005260:Female; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D009622:Noise; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013061:Speech Acoustics; D058067:Wavelet Analysis
keywords: binary mask filtering; semi-soft filtering; speech enhancement; wavelet shrinkage; wavelet transform