An Evaluation of In-CAR Speech Enhancement Techniques With Microphone Array Steering
نویسندگان
چکیده
In this paper, we evaluate a performance of in-car speech enhancement techniques with single channel signal processing and microphone array signal processing. We employ SS (Fourier Spectral Subtraction) and WSS (Wavelet Spectral Subtraction) as single channel signal processing and delay-and-sum beamformer, eigen beamformer, AMNOR (Adaptive Microphone array for NOise Reduction), S-AMNOR, Svc-AMNOR, and MV (Minimum Variance) beamformer as microphone array signal processing. In-car speech database designed by CIAIR (Center for Integrated Acoustic Information Research, Nagoya University) was used for this evaluation. It has numerous in-car speech signals with multiple microphones. Therefore, we evaluate a performance of in-car speech enhancement techniques with this database. As a result of evaluation experiments, we confirmed the performance of each technique in some conditions (for example, idling, side window (open/close), car-audio (on/off), air-conditioner (high/low/off), and so on) of in-car.
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