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Two-channel perfect-reconstruction FIR QMF structures which yield linear-phase analysis and synthesis filters

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2 Author(s)
Nguyen, T.Q. ; Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA ; Vaidyanathan, P.P.

Two perfect-reconstruction structures for the two-channel quadrature mirror filter (QMF) bank, free of aliasing and distortions of any kind, in which the analysis filters have linear phase, are described. The structure in the first case is related to the linear prediction lattice structure. For the second case, new structures are developed by propagating the perfect-reconstruction and linear-phase properties. Design examples, based on optimization of the parameters in the lattice structures, are presented for both cases.<>

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:37 ,  Issue: 5 )