A simple iterative technique for the design of cosine modulated pseudo QMF banks

Authors:
A. Kumar;G. K. Singh;R. S. Anand
Affiliations:
IIT Roorkee, India;IIT Roorkee, India;IIT Roorkee, India
Venue:
Proceedings of the International Conference on Advances in Computing, Communication and Control
Year:
2009

Citing 6
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An improved and simplified design of cosine-modulated pseudo-QMF filterbanks

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A general formulation of modulated filter banks

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A simple method for designing high-quality prototype filters forM-band pseudo QMF banks

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An Improved and Simplified Approach for Designing Cosine Modulated Filter Bank Using Window Technique

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Abstract

This paper presents a simple and efficient iterative technique for the design of cosine modulated pseudo quadrature mirror filter (QMF) banks. In the proposed algorithm, cutoff frequency is optimized to satisfy a new perfect reconstruction condition at frequency (ω = π/2M). Adjustable Window functions are used to design the prototype filter cosine modulated pseudo QMF banks. When compared to other existing techniques, the proposed algorithm significantly reduces amplitude distortion, number of iterations, aliasing distortion, and computation time. Several design examples are included to illustrate the proposed algorithm and its improved performances over other exiting methods.