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A hybrid subband adaptive system for speech enhancement in diffuse noise fields

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4 Author(s)
Abutalebi, H.R. ; Electr. Eng. Dept., Amirkabir Univ. of Technol., Tehran, Iran ; Sheikhzadeh, H. ; Brennan, R.L. ; Freeman, G.H.

Performance of adaptive noise cancellation (ANC) degrades severely when uncorrelated noise components are present at the two inputs. Thus, practical background diffuse noises pose a serious problem for ANC systems. In this letter, we propose a new hybrid system that integrates subband adaptive filters (SAFs) and a Wiener filter. The hybrid system is implemented on an oversampled DFT filterbank that efficiently integrates the SAF and the Wiener filter components in the frequency-domain. Performance evaluation of the hybrid system in presence of diffuse noise interference shows that the proposed system is superior to both the Wiener filter and the SAF subsystems.

Published in:

Signal Processing Letters, IEEE  (Volume:11 ,  Issue: 1 )