Publications – Details
Combination of Two-Channel Spectral Subtraction and Adaptive Wiener Post-Filtering for Noise Reduction and Dereverberation
- Authors:
- Matthias Dörbecker and Stefan Ernst
- Book Title:
- Proceedings of European Signal Processing Conference (EUSIPCO)
- Venue:
- Trieste, Italy
- Date:
- Sept. 1996
- Pages:
- 995–998
- Language:
- English
Abstract
In this contribution a novel structure for the enhancement of speech signals disturbed by acoustic noise is presented which is based on Spectral Subtraction. The Spectral Subtraction technique is combined with a novel estimator for the noise power spectrum which takes advantage of the employment of a second microphone. Due to the extension to a two-microphone system the Spectral Subtraction can be used to reduce realistic, non-stationary noise sources. Additionally, the performance of the system is further improved by the application of a post filter adapted according to Wiener filter techniques. As a result, the proposed speech enhancement system provides a significant suppression of noise in realistic situations as well as a reduction of room reverberation.
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