A wavelet transform-based ECG compression method guaranteeing desired signal quality
Citations
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Cites background or methods from "A wavelet transform-based ECG compr..."
...Quality assessment is important in lossy methods since most of the reported methods employed thresholding of samples/coefficients directly or indirectly (via quantization scheme) [2]....
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...It includes diagnostic distortion measures such as weighted PRD [2], weighted diagnostic distortion (WDD) [7], wavelet based weighted PRD (WWPRD) [8] and wavelet energy based diagnostic distortion (WEDD) [9] measure....
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...The effectiveness of the global error measures such as MSE, NMSE, RMSE, NRMSE, PRD, SNR and NCC is analyzed with different sets of experiments [2], [5]....
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...This is because the distortions introduced by the compression methods mainly depend on the type of methodology (amplitude zone time epoch coding (AZTEC), turning point (TP), Fan, prediction, interpolation, Fourier transform (FT), Karhunen-Loeve transform (KLT), Discrete cosine transform (DCT) [1], discrete sinc interpolation (DSI), Wavelet transform (WT) [2] vector quantization (VQ), etc....
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...In general, the percentage rms difference (PRD) is a normalized value which indicates the error between original and reconstructed signals [2]....
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13 citations
Cites background or methods from "A wavelet transform-based ECG compr..."
...In the past two decades, a substantial progress has been made in the field of data compression [11-24]....
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...Recently transform based compression techniques are has become popular for ECG signals; especially wavelet transform based several techniques [13, 15-24]....
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...They can be categorized into three main types: direct techniques [18], parameter extraction [9-11] and transform and coding based techniques [12-23]....
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11 citations
Cites result from "A wavelet transform-based ECG compr..."
...The simulated results compare with the other algorithms or methods (Chen et al., 2008; Chen and Itoh, 1998) results show the presented results of ECG compression based on Kaiser and Blackman wavelet is better than the others....
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References
8,588 citations
"A wavelet transform-based ECG compr..." refers methods in this paper
...Since detailed mathematical aspects of wavelet theory can b found elsewhere [16], here, we shall merely describe the structure of a DOWT-based coding system shown in Fig....
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...The proposed algorithm was implemented on a SparcStation 2 computer, where the wavelet-based filters with 10-taps were designed by Daubechies’s algorithm [16], the layer was set to , the buffer size for segmenting input ECG signals was set to , and the Lempel–Ziv–Welch (LZW) encoder [20] was chosen as the entropy encoder for simplicity....
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2,426 citations
"A wavelet transform-based ECG compr..." refers methods in this paper
...The proposed algorithm was implemented on a SparcStation 2 computer, where the wavelet-based filters with 10-taps were designed by Daubechies’s algorithm [16], the layer was set to , the buffer size for segmenting input ECG signals was set to , and the Lempel‐Ziv‐Welch (LZW) encoder [ 20 ] was chosen as the entropy encoder for simplicity....
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869 citations
690 citations
"A wavelet transform-based ECG compr..." refers methods in this paper
...In most cases, direct methods are superior to transform methods with respect to system complexity and the error control mechanism, however, transform methods usually achieve higher compression ratios and are insensitive to the noise contained in original ECG signals [1]....
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...In direct methods, the compression is done directly on the ECG samples; examples include the amplitude zone time epoch coding (AZTEC), the turning point (TP), the coordinate reduction time encoding system (CORTES), the scan-along polygonal approximation (SAPA), peak-picking, cycle-to-cycle, and differential pulse code modulation (DPCM) [1]–[4]....
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445 citations