Beamformer for Driving Binaural Speech Enhancement
Löllmann H, Vary P (2012)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2012
Publisher: VDE Verlag GmbH
City/Town: Berlin
Pages Range: 1-4
Conference Proceedings Title: Proceedings of International Workshop on Acoustic Signal Enhancement (IWAENC)
Event location: Aachen
Abstract
A beamformer for binaural speech enhancement systems in digital hearing aids is proposed. Its single modules for the estimation of the time-difference-of-arrival (TDOA) and time-alignment operate in the frequency-domain and have a low computational complexity. The TDOA estimation is performed efficiently by a generalized cross-correlation with phase transform weighting. The estimation accuracy for filter-banks with a limited number of subbands, which are needed for hearing aids to meet tight delay constraints, is improved by a histogram-based TDOA estimation. The subsequent time-alignment is accomplished by a simple multiplication with spectral phase factors. A primary application of the proposed system are binaural cue preserving speech enhancement systems based on spectral weighting. The proposed beamformer can be used as delay-and-sum and/or delay-and-subtract beamformer to provide subband signals from which the power spectral densities of interfering sources can be estimated to drive the spectral weight calculation.
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How to cite
APA:
Löllmann, H., & Vary, P. (2012). Beamformer for Driving Binaural Speech Enhancement. In VDE (Eds.), Proceedings of International Workshop on Acoustic Signal Enhancement (IWAENC) (pp. 1-4). Aachen, DE: Berlin: VDE Verlag GmbH.
MLA:
Löllmann, Heinrich, and Peter Vary. "Beamformer for Driving Binaural Speech Enhancement." Proceedings of the International Workshop on Acoustic Signal Enhancement (IWAENC), Aachen Ed. VDE, Berlin: VDE Verlag GmbH, 2012. 1-4.
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