Implementation of an Adaptive Filter Algorithm with Subband Filtering Approach on Acoustic Echo Cancellation

Abstract

This paper focuses on model and its realization on digital signal processors (DSP) for suppressing annoying acoustic echoes in telephone and mobile communication applications. For cost sensitive subscriber devices and high quality voice communications the aims are 1) minimum computational complexity 2) maximum convergence speed and 3) maximum echo attenuation. The chosen method for the echo cancellation involves a sub band decomposition performing the adaptive filtering in subbands at a down sampled sampling rate to up sampling rate. The algorithm is described theoretically, modeled under MATLAB/Simulink and implemented on a
fixed-point DSP