介绍了小波变换的快速算法——Mallat算法和三次B-样条小波滤波器组系数,详细讨论了信号奇异性、小波函数奇偶性与模极大值的关系,最后给出了一个利用小波系数模极大值定位信号奇异点的实例。%This paper introduces the fast algorithm of wavelet transform：Mallet algorithm and 3-order B-Spline wavelet filter group coefficients,discusses the relationship between the signal singularity,the parity of wavelet function and modulus maxima in detail,finally gives an example of using modulus maxima of wavelet coefficient to locate the singular points of signal.
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