一種自適應(yīng)多子波預(yù)濾波器的設(shè)計
DESIGN OF ADAPTIVE MULTIWAVELET PREFILTER
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摘要: 該文設(shè)計了一種自適應(yīng)多子波預(yù)濾波器,解決了由于多子波的尺度函數(shù)不具有低通特性而帶來的離散多子波變換的初始化問題。分析和實驗結(jié)果表明了預(yù)濾波算法具有良好的逼近性能。
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關(guān)鍵詞:
- 自適應(yīng)預(yù)濾波器; 多子波變換; 多尺度函數(shù)
Abstract: This paper proposes an adaptive multiwavelet prefilter. The prefilter deals with the multi-wavelet initialization problem resulting from the non-lowpass property of multiscaling functions. Theory analysis and simulation results show that the approximation accuracy of the prefiltering algorithm is satisfactory. -
Cohn, I. Daubechies, G. Plonka, Regularity of refinable function vectors, J. Fourier Anal. Appl., 1997, 3(2), 295-324.[2]G. Plonka, Approximation order provided by refinable finction vectors, Constr. Approx., 1997,13(2), 221-224.[3]X.G. Xia, J. S. Geronimo, D. P. Hardin, B. W. Suter, Design of prelilters for discrete multiwavelet transforms, IEEE Trans. on Signal Processing, 1996, 44(1), 25 35.[4]P.N. Heller, et al., Multiwavelet filter banks for data compression, in Proc. IEEE ISCAS,Washington, 1995, 1796-1799.[5]X.G. Xia, A new prefilter design for discrete multiwavelet tranyforms, IEEE Trans. on SignalProcessing, 1998, 46(6), 1558-1570. -
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