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

Abstract

This paper  focus on  model and its realization on digital signal processors (DSP) for suppressing annoying acoustic echoes in tele- phone and mobile communication applications. Such has high quality voice communications, Video conference and Audio conference .and main Features are 1) Less computational complexity 2) maximum Attenuation  fast convergence rate , and speed. The performing of the adaptive filtering in subbands at a down-up-scaled sampling rate. The algorithm is described theoretical, and Practical modeled under MATLAB/Simulink tool. And implemented on a fixed-point DSP Processor.

Keywords: DSP Processor, Adaptive filters, (LMS) Near End Speaker´s(NES), Far End Speaker (FES), LEM System, ECF non-linear filters, Analysis Filter and Synthesis Filter