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An efficient approach for the design of nearly perfect-reconstruction QMF banks

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3 Author(s)
Zhu, W.P. ; Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada ; Ahmad, M.O. ; Swamy, M.N.S.

In this work, an approach for the design of a class of quadrature mirror filter (QMF) banks is presented based on a combination of IIR analysis filters and FIR synthesis filters. By examining the phase property of the all-pass based analysis filter, a condition on the synthesis part for a perfect reconstruction is established, making it possible to realize a nearly perfect-reconstruction (PR) filter bank by using a nonlinear-phase FIR synthesis filter. The distinct feature of the proposed mixed IIR/FIR filter bank is that it enjoys both a small reconstruction error and a low design and implementation complexity

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Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 8 )