Two microphones speech enhancement system based on instrumental variable algorithms [articol]

Abstract

In this paper a symmetric feedback implementation scheme of a two microphones speech enhancement is presented. This approach can be extended for a subclass of signal separations where the direct link is stronger than the interference link in the both channels. We consider the coupling systems modeled as a linear time-invariant Finite Impulse Response (FIR) filters and propose new instrumental variable-based adaptive filters solution to enhance the noisy speech. The optimum filter weight adaptation is based on two instrumental variable algorithms: the generalized least mean square (GLMS) algorithms and the overdetermined recursive instrumental variable (ORIV) algorithms. A comparative study with other adaptive algorithms is presented.