Title :
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
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;
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
DOI :
10.1109/SSP.2009.5278477
