M-channel linear phase cosine modulated filter banks with perfect reconstruction

Authors:
K. M. Abdul Hameed;Elizabeth Elias
Affiliations:
Department of Electronics Engineering, National Institute of Technology, Calicut, Kerala, India;Department of Electronics Engineering, National Institute of Technology, Calicut, Kerala, India
Venue:
MUSP'06 Proceedings of the 6th WSEAS international conference on Multimedia systems & signal processing
Year:
2006

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Abstract

A class of cosine modulated filter banks in which all the sub-band filters have linear phase is presented. It has only M bands compared to the 2M channel structures so far reported in the literature. The filter bank uses only one prototype filter for both analysis and synthesis side and structurally guarantee perfect reconstruction property. The formulation is based on DCT-II. The necessary and sufficient conditions for the perfect reconstruction and linear phase are derived.