Double affine projection algorithm-based speech enhancement algorithm

A symmetric feedback implementation scheme for two microphones speech enhancement is presented. We consider the coupling systems modeled as a linear time-invariant finite impulse response (FIR) filter and propose a new recursive-based adaptive filter solution to enhance the noisy speech. The optimum filter weight adaptation is based on a double affine projection algorithm (DAPA). This approach can be extended for a subclass of signal separations where the direct link is stronger than the interference link in both channels. A comparative study with other adaptive algorithms shows the superiority of the DAPA in performance improvement.