中文说明：小波变换是一种新的变换分析方法，它继承和发展了短时傅立叶变换局部化的思想，同时又克服了窗口大小不随频率变化等缺点，能够提供一个随频率改变的时间一频率窗口，是进行信号时频分析和处理的理想工具。它的主要特点是通过变换能够充分突出问题某些方面的特征，因此，小波变换在许多领域都得到了成功的应用，特别是小波变换的离散数字算法已被广泛用于许多问题的变换研究中。从此，小波变换越来越引进人们的重视，其应用领域来越来越广泛。
English Description：
Wavelet transform is a new method of transform analysis. It inherits and develops the idea of localization of short-time Fourier transform. At the same time, it overcomes the shortcomings of window size not changing with frequency. It can provide a time-frequency window changing with frequency. It is an ideal tool for signal time-frequency analysis and processing. The main feature of wavelet transform is that it can fully highlight the characteristics of some aspects of the problem through transformation. Therefore, wavelet transform has been successfully applied in many fields, especially the discrete digital algorithm of wavelet transform has been widely used in the transformation research of many problems. Since then, more and more attention has been paid to wavelet transform, and its application has become more and more extensive.