Research Article
Noise Suppression in ECG Signals through Efficient One-Step Wavelet Processing Techniques
Table 2
Denoising evaluation using synthetic ECG signals.
| | M | Threshold | Wavelet | SNR | SNRIMP | M | Threshold | Wavelet | SNR | SNRIMP |
| | Soft thresholding 15 dB | Hard thresholding 15 dB |
| | 3 | Thexp | coif3 | 21.2631 | 6.4015 | 4 | Thminimax | sym7 | 20.8648 | 5.9319 | | 3 | Thexp | db7 | 21.4798 | 6.3944 | 4 | Thminimax | sym7 | 21.0110 | 5.9256 | | 3 | Thexp | coif3 | 21.4773 | 6.3919 | 4 | Thminimax | sym7 | 20.7633 | 5.9017 | | 3 | Thexp | db7 | 21.2360 | 6.3743 | 5 | Thminimax | sym7 | 20.8288 | 5.8958 | | 3 | Thexp | sym7 | 21.4286 | 6.3432 | 5 | Thminimax | sym7 | 20.7219 | 5.8603 | | 3 | Thexp | db5 | 21.4274 | 6.3420 | 5 | Thminimax | sym7 | 20.9024 | 5.8170 | | 3 | Thexp | db5 | 21.2008 | 6.3391 | 3 | Thminimax | sym7 | 20.8818 | 5.7964 |
| | Soft thresholding 25 dB | Hard thresholding 25 dB |
| | 3 | Thexp | bior3.9 | 29.5524 | 4.4960 | 3 | Thminimax | bior6.8 | 29.5025 | 4.5809 | | 3 | Thexp | bior3.9 | 29.2865 | 4.3649 | 3 | Thminimax | bior6.8 | 29.6610 | 4.5534 | | 3 | Thexp | sym7 | 29.2657 | 4.3440 | 4 | Thminimax | bior6.8 | 29.5801 | 4.4725 | | 3 | Thexp | sym7 | 29.3678 | 4.3114 | 4 | Thminimax | bior6.8 | 29.3823 | 4.4607 | | 3 | Thexp | bior3.9 | 29.3712 | 4.2784 | 3 | Thminimax | bior6.8 | 29.5049 | 4.4485 | | 3 | Thexp | bior6.8 | 29.2479 | 4.1915 | 3 | Thminimax | sym6 | 29.5035 | 4.4471 | | 3 | Thminimax | bior3.9 | 29.0937 | 4.1720 | 5 | Thminimax | bior6.8 | 29.5436 | 4.4360 |
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