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Real-time implementation of HMM-based MMSE algorithm for speech enhancement in hearing aid applications

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3 Author(s)
Sheikhzadeh, H. ; Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada ; Brennan, R.L. ; Sameti, H.

We describe our recent work on the real-time implementation of a state-of-the-art HMM-based MMSE speech enhancement algorithm, where our earlier published algorithm has been approximated, optimized, and simplified. The key innovations enabling the enhancement system to run in real-time are: (1) an algorithm for automatic selection of the noise model, (2) pruning the MMSE forward calculations, (3) a new pause detection method useable for a SNR down to 0 dB, and (4) task partitioning of the entire system. A preliminary version of the real-time enhancement system is simulated on the IBM-PC 486DX2/66 and at the same time implemented on a DSP platform based on dual TMS320C30 DSP chips using single precision floating point arithmetic

Published in:

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on  (Volume:1 )

Date of Conference:

9-12 May 1995