Development of Low Cost Filter Banks for Audio Applications

Abstract

An approach for low cost uniform and octave filter banks for Audio applicationsis proposed. The analysis stages of these filterbanks are based on IIR allpass secondorder sections with modified response. The modification is performed by forcingphase non-linearity at the analysis stage to be out of region of interest. Byoversampling, the non-linear segments near the band edges are removed throughsubsequent synthesis filtering. Compared to existing literature designs, the newapproach offers a substantial lowering in computational power, and a lowerinput/output delay.The simulation and testing of this technique was performed usingMATLAB software package