Wavelets And Signal Processing

At present, the signal processing as one of the field of study is a hotspot. The contrast, it changes with Fourier with the nature of the progress, especially through Fourier analysis can’t do the local of high frequency signals with defects. Meanwhile, the analysis Fourier analysis epochal development as a result, the already had and widely used in signal processing. Specific said, international and domestic many scientists have put the analysis of the existing theories result of wide application in image processing and characteristics of the extraction and processing and signaling filtering, further stated that the analytical applications areas of development studies. At present, the signal processing is the important function of integral functions.This article mainly contains two parts of the content:first, using one dimensional spline wavelet as the approximation tool, reconstruct the band limited function, and calculate the order of error.. Second, the band limited function is extended to two-dimensional function, and the use of two-dimensional wavelet approximation of the results are given.