Method for spectral subtraction in speech enhancement
US7428490B2 · kind B2 · utility
13Cited by
6References
29Claims
0Family size
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Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Nov 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system is provided for enhancing an audio signal based on spectral subtraction. The noise power spectrum for each frame of an audio signal is dynamically estimated based on a plurality of signal power spectrum values computed from a corresponding plurality of adjacent frames. An over-subtraction factor is then dynamically computed for each frame based on the noise power spectrum estimated for the frame. The signal power spectrum of the audio signal at each frame is then reduced in accordance with the over-subtraction factor computed for the corresponding frame.
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