中文说明：先对已有心电信号进行读取，再人为加入一定的白噪声，然后运用小波阈值去噪法对加有白噪声的心电信号进行去噪，并给出原始，加有白噪声及去噪后的图像，另外还计算出了信噪比及均方根误差。
English Description：
To read the signals, then artificially added white noise and Wavelet threshold denoising method of additive white noise of ECG signal denoising, and the original, add white noise and noise to the image, and also calculate the signal to noise ratio, root mean square error.