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We present a new method to design prototype filters for conventional cosine-modulated pseudo-quadrature mirror filter (QMF) banks. This method is based on windowing, and sets the 3-dB cutoff frequency of the filter obtained at 2 . In this way, the filter bank performance can be significantly improved compared to other existing design methods. Index Terms-Channel bank filters, filtering theory.doi:10.1109/97.988722 fatcat:ri2gcqjvdnesvkz3t6zh7sapwu