Design of selective M-channel perfect reconstruction FIR filter banks

A new method is presented for the optimal design of M-channel perfect recon struction FIR quadrature mirror filter (QMF) banks which is based on the or thogonal matrix concept. The parameters of the analysis filters are adjuste d so that they have a linear phase and minimum stopband energy. Comparison with a recently published method reveals that the resulting design procedur e gives better stopband characteristics. A numerical design example is incl uded to validate the theory and to demonstrate the superiority of the desig ned filters from selectivity, reconstruction and distortion points of view.