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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chuang He Zweig, G. |
| Copyright Year | 1999 |
| Description | Author affiliation: T Div., Los Alamos Nat. Lab., NM, USA (Chuang He) |
| Abstract | An improved spectral subtraction algorithm for enhancing speech corrupted by additive wideband noise is described. The artifactual noise introduced by spectral subtraction that is perceived as musical noise is 7 dB less than that introduced by the classical spectral subtraction algorithm of Berouti et al. (1979). Speech is decomposed into voiced and unvoiced sections. Since voiced speech is primarily stochastic at high frequencies, the voiced speech is high-pass filtered to extract its stochastic component. The cut-off frequency is estimated adaptively. Multi-window spectral estimation is used to estimate the spectrum of stochastically voiced and unvoiced speech, thereby reducing the spectral variance. A low-pass filter is used to extract the deterministic component of voiced speech. Its spectrum is estimated with a single window. Spectral subtraction is performed with the classical algorithm using the estimated spectra. Informal listening tests confirm that the new algorithm creates significantly less musical noise than the classical algorithm. |
| Starting Page | 793 |
| Ending Page | 796 |
| File Size | 450870 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780350413 |
| ISSN | 15206149 |
| DOI | 10.1109/ICASSP.1999.759790 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-03-15 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Stochastic resonance Noise reduction Frequency estimation Cutoff frequency Noise level Background noise Stochastic processes Speech enhancement Laboratories Additive noise |
| Content Type | Text |
| Resource Type | Article |
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