Conference Paper

Extension of the multi-channel Wiener filter with ITD cues for noise reduction in binaural hearing aids

Dept. of Electr. Eng., Katholieke Univ., Leuven
DOI: 10.1109/ASPAA.2005.1540171 Conference: Applications of Signal Processing to Audio and Acoustics, 2005. IEEE Workshop on
Source: IEEE Xplore

ABSTRACT This paper presents a novel extension of the multi-channel Wiener filter (MWF) for noise reduction in binaural hearing aids, taking into account binaural localisation cues. By adding a term related to the interaural time difference (ITD) cue of the noise component to the cost function of the MWF, both the ITD cues of the speech and the noise component can be preserved, in addition to significantly improving the signal-to-noise ratio of the microphone signals

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    ABSTRACT: In this paper a theoretical analysis of the binaural cue preserva- tion of the multi-channel Wiener filter (MWF) is performed. We will prove that in the case of a single speech source the MWF perfectly preserves the binaural cues of the speech component, but changes the binaural cues of the noise component to the cues of the speech component. In addition, we show that by extend- ing the MWF cost function with terms related to the interaural transfer function it is possible to preserve the binaural cues of both the speech and the noise component, without considerably reducing the noise reduction performance.

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