Savitzky-Golay Least-Squares Polynomial Filters in ECG Signal….pdfVIP

Savitzky-Golay Least-Squares Polynomial Filters in ECG Signal Processing S Hargittai Innomed Medical Inc., Budapest, Hungary Abstract 2. Methods The Savitzky-Golay(SG) filters are widely used for First, theoretical analysis was performed in the time smoothing and differentiation in many fields namely in and frequency domain, and then the SG filters were elastography, EEG and magnetocardiogram signal applied to artificial and real ECG records. Analytical processing and mainly in absorption spectroscopy. ECG records from the EN 60601-2-51 standard are used Despite their exceptional features they were rarely used as artificial ECG, and records from the CSE multi-lead so far in the ECG signal processing. The aim of this database are used as real ECG. All used signals had 500 paper is the investigation of their properties in d etail Hz sampling rate. from the ECG signal processing aspect. There were considered smoothing and differentiation filters 2.1. Investigating SG smoothing filters in approximating polynomials of zero to fourth order with 3 the time domain – 25-point lengths. The filtering effect and the retaining Since SG filters have been derived from the field of of small details of signal are opposite requirements and