Electrocardiogram baseline removal
An electrocardiogram and baseline technology, applied in medical science, diagnosis, instruments, etc., can solve the problems of incomplete filtering of baseline changes, calculation errors, etc., and achieve the effect of easy implementation and reduced distortion
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[0025] figure 2 System diagram 200 is a system diagram 200 for an ECG baseline change filtering system. The input ECG 210 is passed to a low pass filter 220 to produce a filtered signal whose high frequency components are filtered out. The filtered signal is then passed to a Savitzky-Golay (SG) filter 230 , which produces an estimate of the baseline change of the input ECG 210 . The SG filter is a filter that performs a local polynomial regression (of degree k) on a series of values (of at least k+1 points) to determine a smoothed value for each point. One advantage of this method is that it preserves characteristics of the distribution, such as relative maxima, minima, and width, which are often "flattened" by other adjacent averaging techniques such as moving averages, for example. ECG 210 may also be passed to delay module 240 to be delayed in time (eg, time shifted). The delay can compensate for any delay introduced by the processing of the low-pass filter 220 and th...
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