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Analysis, design, and implementation of two-channel linear-phase filter banks: a new approach

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2 Author(s)
Pinchon, D. ; Lab. Math. pour l''Ind. et la Phys., Univ. Paul Sabatier, Toulouse, France ; Siohan, P.

The problem of designing two-channel perfect-reconstruction FIR filter banks with linear-phase analysis and synthesis filters is revisited. Based on a new algebraic formulation, all the possible factorized forms for this two-band filter bank are derived. We thus obtain complete and canonical solutions for the filter banks, composed of odd-order symmetric and antisymmetric filters (type-A systems) and for those built with symmetric even order filters (type-B systems). A strong characteristic of these new cascade structures, which, until now, had not been identified, is related to a defectivity property. Taking this into account is the key issue to cover all the FIR solutions and to design cascade structures being robust to the quantization of their parameters. Design examples are provided that illustrate our method

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Signal Processing, IEEE Transactions on  (Volume:46 ,  Issue: 7 )