A Hybrid Subband Adaptive System for Speech Enhancement in Diffuse Noise Fields
Hamid Reza Abutalebi, Hamid Sheikhzadeh, Robert L. Brennan, George H. Freeman · IEEE Signal Processing Letters · 2004
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.