Abstract
This paper presents an improved and efficient method for the design of a two-channel quadrature mirror filter (QMF) bank. In the proposed method, the filter bank design problem is formulated as a low-pass prototype filter design problem, whose responses in the passband and stopband are ideal and their filter coefficients value at quadrature frequency is 0.707. A new method is developed for the design of a low-pass prototype filter which minimizes the objective function by optimizing the filter taps weights using the Levenberg–Marquardt method. When compared with other existing algorithms, it significantly reduces peak reconstruction error (PRE), error in passband, stopband and transition band. Several design examples are included to show the increased efficiency and the flexibility of the proposed method over existing methods. An application of this method is considered in the area of subband coding of the ultrasound images.
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Kumar, A., Singh, G.K. & Anand, R.S. An improved method for the design of quadrature mirror filter banks using the Levenberg–Marquardt optimization. SIViP 7, 209–220 (2013). https://doi.org/10.1007/s11760-011-0209-9
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DOI: https://doi.org/10.1007/s11760-011-0209-9