Analysis/synthesis filterbank

This approach has been extended to a multirate implementation by embedding the bank of comb filters in the interior of a multirate analysis/synthesis filterbank [Zoelzer et al., 1990], A multirate implementation reduces the memory requirements for the comb filters, and also allows the use of an efficient polyphase analysis/synthesis filterbank [Vaidyanathan, 1993],... 

Ramstadt and Tanem, 1991] Ramstadt, T. A. and Tanem, J. P. (1991). Cosine-modulated analysis-synthesis filterbank with critical sampling and perfect reconstruction. In Proc. IEEE Int. Conf. Acoust., Speech and Signal Proc, pages 1789-1792. 

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