ECG signal is easily contaminated by many kinds of noise. For the kinds of noise whose frequencies cover those of ECG signals , because the results obtained are not good , or there is large amount of calculation, most of the current reported detection methods are not suitable for real - time processing. Based on differential value of ECG signals and the method of " detection - silence period. of R waves, we developed a noise elimination method. This method was proved to be an efficient one, verified with cl...