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http://dx.doi.org/10.6109/jkiice.2011.15.8.1665

A Generalized Subspace Approach for Enhancing Speech Corrupted by Colored Noise Using Whitening Transformation  

Lee, Jeong-Wook (부산대학교 전자공학과)
Son, Kyung-Sik (부산대학교 전자공학과)
Park, Jang-Sik (경성대학교 전자공학과)
Kim, Hyun-Tae (동의대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.15, no.8, 2011 , pp. 1665-1674 More about this Journal
Abstract
In this paper, we proposed an algorithm for speech enhancement of speeches corrupted by colored noise. When there is no correlation between colored noise and speech signal, the colored noise turns into white noise through whitening transformation. This transformed signal has been applied to the generalized subspace approach for speech enhancement. The speech spectral distortion, produced by the whitening transformation as pre-processing, has been restored by using the inverse whitening transformation as post-processing of the proposed algorithm. The performance of the proposed algorithm for speech enhancement has been confirmed by computer simulation. The colored noises used in this experiment were car noise and multi-talker babble. It is confirmed that the proposed algorithm shows better performance from SNR and SSD viewpoint over the previous approach with the data from the AURORA and TIMIT data base.
Keywords
Speech Enhancement; Generalized Subspace Approach; Whitening Transformation; Post-processing;
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