A morphological approach to single-channel wind-noise suppression

Hofmann C, Wolff T, Buck M, Haulick T, Kellermann W (2012)


Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2012

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 209-212

Article Number: 6309438

Event location: Aachen DE

ISBN: 978-3-8007-3451-1

URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84957677844∨igin=inward

Abstract

Today, a variety of technical devices deploy spoken language processing technology. In many practical use cases, not only stationary ambient noises but non-stationary interferences, such as wind noise, degrade their performance. If only one microphone is available, regular noise reduction schemes are capable of suppressing stationary interferences. Wind noises, however, are highly non-stationary and may be annoying in a hands-free application, for instance. To suppress such interferences in a speech signal, we propose to consider the signal spectrogram as an image and to exploit neighborhood relations in the time-frequency plane, hence morphological features. To this end, wind-noise-typical energy patterns are extracted by morphological operations employing both the signal spectrogram and its temporal derivative. The resulting estimate of the interference power spectral density is then used for speech enhancement in a subband-processing framework. Distance measures and informal listening tests indicate the effectiveness of the proposed method compared to classical noise-reduction schemes in the presence of non-stationary interferences of wind noise.

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How to cite

APA:

Hofmann, C., Wolff, T., Buck, M., Haulick, T., & Kellermann, W. (2012). A morphological approach to single-channel wind-noise suppression. In Proceedings of the International Workshop on Acoustic Signal Enhancement (IWAENC) (pp. 209-212). Aachen, DE: Institute of Electrical and Electronics Engineers Inc..

MLA:

Hofmann, Christian, et al. "A morphological approach to single-channel wind-noise suppression." Proceedings of the International Workshop on Acoustic Signal Enhancement (IWAENC), Aachen Institute of Electrical and Electronics Engineers Inc., 2012. 209-212.

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