Vector quantization for compression of multichannel ECG
- 1 January 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. 37 (9) , 821-825
- https://doi.org/10.1109/10.58592
Abstract
We propose a scheme based on vector quantization (VQ) for the data-compression of multichannel ECG waveforms. N-channel ECG is first coded using m-AZTEC, a new, multichannel extension of the AZTEC algorithm. As in AZTEC, the waveform is approximated using only lines and slopes; however, in m-AZTEC, the N-channels are coded simultaneously into a sequence of N + 1 dimensional vectors, thus exploiting the correlation that exists across channels in the AZTEC duration-parameter. Classified vector quantization (CVQ) of the m-AZTEC output is next performed to exploit the correlation in the other AZTEC parameter, namely, the value-parameter. CVQ preserves the waveform morphology by treating the lines and slopes as two perceptually-distinct classes. Both m-AZTEC and CVQ provide data-compression and their performance improves as the number of channels increases. Moreover, the final output differs little from the AZTEC output and hence ought to enjoy the same acceptability.Keywords
This publication has 11 references indexed in Scilit:
- Classified Vector Quantization of ImagesIEEE Transactions on Communications, 1986
- From Holter Monitors to Automatic Defibrillators: Developments in Ambulatory Arrhythmia MonitoringIEEE Transactions on Biomedical Engineering, 1984
- Vector quantizationIEEE ASSP Magazine, 1984
- Scan-Along Polygonal Approximation for Data Compression of ElectrocardiogramsIEEE Transactions on Biomedical Engineering, 1983
- A New Data-Reduction Algorithm for Real-Time ECG AnalysisIEEE Transactions on Biomedical Engineering, 1982
- An Algorithm for Vector Quantizer DesignIEEE Transactions on Communications, 1980
- Compression of the ECG by Prediction or Interpolation and Entropy EncodingIEEE Transactions on Biomedical Engineering, 1979
- Automated cardiac dysrhythmia analysisProceedings of the IEEE, 1979
- AZTEC, a Preprocessing Program for Real-Time ECG Rhythm AnalysisIEEE Transactions on Biomedical Engineering, 1968
- A Mathematical Theory of CommunicationBell System Technical Journal, 1948