On the theory and design of a class of perfect-reconstruction nonuniform cosine-modulated filter-banks

This paper presents the theory and design of a class of perfect-reconstruction (PR) recombination nonuniform cosine-modulated filter-banks (CMFBs) when the numbers of channels in the two filter-banks (FBs) are not coprime to each other. Since the analysis and synthesis filters are linear periodic time varying, a new method is proposed to minimize the additional aliasing components. A detailed design example is given to demonstrate the usefulness of the proposed method.