Key result
Combined wavelet and modified run-length encoding achieves a 20:1 compression ratio for ECG signals.
A combined wavelet and modified run-length encoding scheme achieves 20:1 ECG compression with a PRD of less than 10.
This paper presents a combined wavelet and a modified run-length encoding schemefor the compression of electrocardiogram (ECG) signals. First, a discrete wavelet transform is applied to the ECG signal. The resulting coefficients are classified into significant and insignificant ones based on the required PRD (percent root mean square difference). Second, both coefficients are encoded using a modified run-length coding method. The scheme has been tested using ECG signals obtained from the MIT-BIH Compression Database. A compression of 20:1 (which is equivalent to 150 bit per second) is achieved with PRD less than 10.
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Ahmad Alshamali (2001) studied electrocardiogram (ECG) signals. combined wavelet and modified run-length encoding scheme was evaluated on compression ratio and PRD (percent root mean square difference). A combined wavelet and modified run-length encoding scheme achieved a compression ratio of 20:1 (150 bits per second) with a percent root mean square difference of less than 10 for ECG signals.
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