Design of a wavelet interpolation filter for enhancement of the ST-segment
| Autor: | Kyoung-Joung Lee, K. S. Jeong, B. C. Lee, Hyung-Min Yoon, M. J. Khil, K. L. Park |
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| Rok vydání: | 2001 |
| Předmět: |
Signal processing
business.industry Speech recognition Biomedical Engineering Wavelet transform Signal Processing Computer-Assisted Pattern recognition Thresholding Haar wavelet Standard deviation Radio spectrum Computer Science Applications Electrocardiography Motion Spline (mathematics) Wavelet Exercise Test Humans Artificial intelligence Artifacts business Mathematics |
| Zdroj: | Medical & Biological Engineering & Computing. 39:355-361 |
| ISSN: | 1741-0444 0140-0118 |
| Popis: | A wavelet interpolation filter (WIF) is designed for the removal of motion artifacts in the ST-segment of stress ECGs. The WIF consists of two parts. One part is a wavelet transform that decomposes the stress ECG signal into several frequency bands using a Haar wavelet. The other part is an interpolation method, such as the spline technique, that is used to enhance the reconstruction performance of the signal decomposed by the wavelet transform. To evaluate the performance of the WIF, three indices are used: signal-to-noise ratio (SNR), reconstruction square error (RSE) and standard deviation (SD). The MIT/BIH arrhythmia database, the European ST-T database and the triangular wave are used for evaluation. A noisy ECG signal, corrupted by motion artifacts, is simulated by the addition of two types of random noise to the original ECG signal. For comparison, three indices for the other methods are also computed: mean, median and hard thresholding. The performance of the WIF shows that RSE, SNR and SD are 392.7, 18.3 dB and 2.6, respectively, in the case of a noisy signal with an SNR of 7.1 dB. This result is much better than those for the other methods. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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