Conventional beamformer using post-filter for speech enhancement

Authors:
Soojeong Lee;Kiho Choi;Soonhyob Kim
Affiliations:
Department of Computer Engineering, Kwangwoon University, Nowon-gu, Seoul, Korea;Department of Computer Engineering, Kwangwoon University, Nowon-gu, Seoul, Korea;Department of Computer Engineering, Kwangwoon University, Nowon-gu, Seoul, Korea
Venue:
ICHIT'06 Proceedings of the 1st international conference on Advances in hybrid information technology
Year:
2006

Citing 4
Cited 0

Discrete Time Processing of Speech Signals

Discrete Time Processing of Speech Signals
Speech enhancement based on a priori signal to noise estimation

ICASSP '96 Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 02
Robust microphone array using subband adaptive beamformer and spectral subtraction

ICCS '02 Proceedings of the The 8th International Conference on Communication Systems - Volume 02
A robust adaptive beamformer for microphone arrays with a blockingmatrix using constrained adaptive filters

IEEE Transactions on Signal Processing

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Abstract

This paper presents a combined handsfree speech enhancement method based on a spatialpost-filter. The scheme uses a linear microphone array to capture a speech signal that has been corrupted by babble noise, car noise, and interference signals. Simulation results for real environment show that the proposed structure achieves a maximum interference suppression of 12 dB, an improvement of 6 dB over the delay and sum beamformer. Furthermore, the system is robust in the presence of distortion as opposed to the generalized sidelobe canceller. The subjective evaluation has shown that the combined system of delay and sum with the minimum mean square error estimator using a noncausal signal to noise ratio (SNR) estimator obtained 3.8 points on a fivepoint.