NDLI: Electrocardiogram signal denoising using non-local wavelet transform domain filtering

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Electrocardiogram signal denoising using non-local wavelet transform domain filtering

Content Provider	IET Digital Library
Author	Yadav, Santosh Kumar Sinha, Rohit Bora, Prabin Kumar
Abstract	Electrocardiogram (ECG) signals are usually corrupted by baseline wander, power-line interference, muscle noise etc. Numerous methods have been proposed to remove these noises. However, in case of wireless recording of the ECG signal it gets corrupted by the additive white Gaussian noise (AWGN). For the correct diagnosis, removal of AWGN from ECG signals becomes necessary as it affects the diagnostic features. The natural signals exhibit correlation among their samples and this property has been exploited in various signal restoration tasks. Motivated by that, in this study we propose a non-local wavelet transform domain ECG signal denoising method which exploits the correlations among both local and non-local samples of the signal. In the proposed method, the similar blocks of the samples are grouped in a matrix and then denoising is achieved by the shrinkage of its two-dimensional discrete wavelet transform coefficients. The experiments performed on a number of ECG signals show significant quantitative and qualitative improvements in denoising performance over the existing ECG signal denoising methods.
Starting Page	88
Ending Page	96
Page Count	9
ISSN	17519675
Volume Number	9
e-ISSN	17519683
Issue Number	Issue 1, Feb (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/9/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2014.0005
Journal	IET Signal Processing
Publisher Date	2015-02-23
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D Discrete Wavelet Transform Coefficients Additive White Gaussian Noise Channel AWGN AWGN Removal Baseline Wander Bioelectric Signal Biology And Medical Computing Correlation Matrix Correlation Theory Digital Signal Processing Discrete Wavelet Transform ECG Signal Denoising Method Electrical Activity in Neurophysiological Processes Electrocardiogram Signal Denoising Electrocardiography Electrodiagnostics And Other Electrical Measurement Technique Electromagnetic Compatibility Filtering Method in Signal Processing Filtering Theory Integral Transforms in Numerical Analysis Interference Interference Suppression Linear Algebra Matrix Algebra Medical Signal Processing Muscle Noise Natural Signal Nonlocal Wavelet Transform Domain Filtering Numerical Analysis Power Line Interference Signal Restoration Wireless Recording
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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