Minimum phase whitening filter to speech beamforming technique
This paper presents application of minimum phase whitening filter for speech enhancement technique to two-microphone beamforming structure. The method uses switching technique for updating the estimate alternately between frontend minimum phase whitening filter during speech plus noise period and re...
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| Main Author: | |
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| Format: | Conference or Workshop Item |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/51168/ http://dx.doi.org/10.1109/ICIEA.2013.6566583 |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | This paper presents application of minimum phase whitening filter for speech enhancement technique to two-microphone beamforming structure. The method uses switching technique for updating the estimate alternately between frontend minimum phase whitening filter during speech plus noise period and rear-end adaptive finite impulse response (FIR) filter during noise alone period. For application of speech beamforming technique, innovations-based minimum phase whitening filter is applied in front of sum and subtract (SS) function with the use of one sample delay filter in rear-end primary input. A test result shows that the proposed approach by alternately switching minimum phase whitening filter and adaptive FIR filter provides an improved performance of 5.9dB and 18.03dB in signal-to-noise ratio (SNR) in stationary noise and non-stationary noise, respectively than adaptive Griffiths and Jim (G-J) beamformer by alternately switching two adaptive FIR filters. |
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