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KMID : 0372919960170020209
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Journal of Biomedical Engineering Research
1996 Volume.17 No. 2 p.209 ~ p.214
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The Study of EEG Signal Display as a Multirate Sampling Problem
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Abstract
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The display of biological signals in raster scan monitors often involves a multirate sampling operation which consists of decimation .and interpolation. All electroencephalouaphic (EEG) samples of 10 to 30 seconds (2,500 to 7,500 samples at 250[Hz] sampling frequency) must be displayed in the computer screen to keep the aspect ratio of the paper polygraph output. Since the current afrorclable display technology Plots at most 2,000 Pixels Per row, sDme signal samples need to be discarde4 This Paper studies methods to perform this operation characterizing them from the signal processing viewpoint and compares the display quality among several decimation techniques. Experimental results show that a nonlinear operation such as the peak detection method could be preferable to the canonical linear fir- tering to reduce aliasing.
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