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In this paper, an ECG signal compression technique is presented based on Slantlet transform with different thresholding functions. The presented compression method is exploited the uniform quantization (UQ) methods with different thresholding criteria on slantlet coefficients of ECG signal. This technique the returned the better reconstruction from compressed data as compare to wavelet and discrete...
In this paper, the gamma corrected adaptive knee transformation, proposed by Monobe et al. is reviewed and improved by exploiting two-dimensional single level Beta wavelet filter for subband decomposition of the low contrast satellite images. For this purpose, the input image is initially decomposed into its subband images such as low-low (LL), low-high (LH), high-low (HL), and high-high (HH)). Then,...
This article presents an efficient optimization algorithm for the design of M-Channel cosine modulated (CM) filter bank using polyphase components (PCs), fractional derivative constraints and particle swarm optimization (PSO). Sum of mean square error between the ideal and required response of prototype filter of CM bank is employed as a cost function for optimizing the PCs of prototype filter. Fractional...
In this paper, an efficient design method of nearly perfect reconstruction cosine modulated transmultiplexer (CM TMUX) is presented for the prescribed stopband attenuation (AS), passband attenuation (AP), and roll off factor (RF). The method employs the weighted constrained least squares (WCLS) technique for the design of a prototype filter for CM TMUX. Here, the cut-off frequency is iteratively varied...
A simple efficient iterative technique for the design of non-uniform filter banks (NUFB) proposed by Soni et al is examined and improved by designing the prototype filters using constrained equiripple finite impulse response (FIR) technique. In this method, instead of optimizing the cut-off frequency, the passband edge frequency (ωP) is varied iteratively in order to adjust the filter coefficients...
An iterative method for the design of the non-uniform filter banks (NUFB) proposed by Soni et al is examined and improved by designing the prototype filters using the modified window such as Kaiser, Cosh and Exponential. These windows are modified by adding third parameter (ρ) which improves the spectral characteristic of the window in terms of smaller ripple ratio (RR), the wider main lobe width...
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