对原始含噪声的信号由小波分解后的小波系数来描述，然后将个尺度上有噪声产生的小波分量去掉，这样保留下来的小波系数基本上是原始信号的小波系数，然后利用小波重构算法重构原始信号-Original noisy signal described by the wavelet coefficients of the wavelet decomposition, then the noise generated by wavelet components removed on a scale, which retained wavelet coefficients basically wavelet coefficients of the original signal, and then take advantage of the wavelet reconstruction algorithm to reconstruct the original signal