An Algorithm of Optimizing Subband Filter Banks Based on ACA

Subband filter banks has been widely used many areas, such as speech coding, image coding, adaptive filter, radar , noise elimination etc. A QMF of ant colony algorithm (ACA-QMF) is proposed which optimizes the coefficient of QMF banks to solve the QMF design problem in this paper. In order to realize the performance of QMF banks approximates perfect reconstruction, the algorithm based on the design free from aliasing and phase distortion could control the change of coefficient of QMF banks and minimize the reconstruction error of QMF banks with minishing amplitude distortion. The experimental results show that ACA-QMF could better cancel the distortion by subband coding.