Title :
Estimation of rate-distortion bounds for compression of ambulatory ECGs
Author :
Hamilton, P.S. ; Tompkins, W.J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
The theoretical rate-distortion bounds for compression of ambulatory electrocardiograms (ECGs) are presented. These bounds estimate the minimum data rate for coding the ECG signal with a given mean-square-error distortion relative to ECGs recorded with a 100-Hz bandwidth. The rate-distortion bounds are calculated from the average power spectrum of an arrhythmia database. The calculations indicate that average coding distortions on the order of 15 μV RMS are required for storage of 24 h of two-channel ECG in 4 MB. The ECG can be stored with average distortions on the order of 11 μV when average beats are subtracted before compression. Average beat subtraction reduces the data rate necessary for storage by approximately 100 b/s regardless of distortion level
Keywords :
data compression; electrocardiography; 100 Hz; 11 muV; 15 muV; 24 hr; 4 MB; ECG signal coding; ambulatory ECG; arrhythmia database; mean-square-error distortion; rate-distortion bounds; Bandwidth; Data compression; Distortion measurement; Electrocardiography; Estimation theory; Frequency response; Monitoring; Rate distortion theory; Rate-distortion; Solid state circuits;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95970
