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IFILTERBANK - Filter bank inversion

Usage

f=ifilterbank(c,g,a);

Description

ifilterbank(c,g,a) synthesizes a signal f from the coefficients c using the filters stored in g for a channel subsampling rate of a (the hop-size). The coefficients has to be in the format returned by either filterbank or ufilterbank.

The filter format for g is the same as for filterbank.

If perfect reconstruction is desired, the filters must be the duals of the filters used to generate the coefficients. See the help on filterbankdual.

Additional parameters

'complex' (default), 'real'
The 'real' flag indicates that the filters g cover only the positive frequencies and does 2*real(f) to effectivelly mirror the filters to cover also the negative frequencies.

References:

H. Bölcskei, F. Hlawatsch, and H. G. Feichtinger. Frame-theoretic analysis of oversampled filter banks. Signal Processing, IEEE Transactions on, 46(12):3256--3268, 2002.