An FLMS based two-microphone speech enhancement system for in-car applications

Author

Freudenberger, Jürgen ; Stenzel, Sebastian ; Venditti, Benjamin

Author_Institution

Dept. of Comput. Sci., Univ. of Appl. Sci., Constance, Germany

fYear

2009

Firstpage

705

Lastpage

708

Abstract

Distributed microphone arrays enable a better compromise for the microphone position with respect to different speaker sizes. They also ensure robust noise reduction with respect to different noise sources. This paper proposes a frequency domain LMS (FLMS) based algorithm to combine the signals of two microphones. It is shown that noise correlation leads to a bias of the FLMS filter transfer function. To overcome this issue a noise cross-power estimator for estimating and correcting the filter bias is proposed.

Keywords

filtering theory; least mean squares methods; microphone arrays; speech enhancement; FLMS algorithm; FLMS filter transfer function; distributed microphone arrays; frequency domain LMS; in-car application; microphone position; noise correlation; noise cross-power estimator; noise sources; robust noise reduction; speech enhancement; Delay estimation; Filters; Frequency domain analysis; Least squares approximation; Microphone arrays; Noise reduction; Noise robustness; Speech enhancement; Transfer functions; Working environment noise; Multi microphone systems; adaptive signal processing; noise reduction;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal Processing, 2009. SSP '09. IEEE/SP 15th Workshop on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-2709-3

Electronic_ISBN

978-1-4244-2711-6

Type

conf

DOI

10.1109/SSP.2009.5278477

Filename

5278477