用下面的程序产生并显示与小波db4相关联的四个滤波器组.小波函数db4的迭代生成过程.单尺度一维离散小波分解与重构-With the following procedures and display associated with the db4 wavelet filter banks of four. Db4 wavelet function to generate the iterative process. Single-scale one-dimensional discrete wavelet decomposition and reconstruction