中文说明：数字信号处理-小波变换，非常有价值，希望对大家有用。利用小波变换，对输入信号进行分解、重建，取得去噪效果。
English Description：
Digital signal processing - wavelet transform, very valuable, hope to be useful to you. Wavelet transform is used to decompose and reconstruct the input signal, and the denoising effect is obtained.