Abstract
Electroencephalography (EEG) is a diagnostic test that records and measures the electrical activity of the human brain. Research investigating human behaviors and conditions using EEG has increased from year to year. Therefore, an efficient approach is vital to process the EEG dataset to improve the output signal quality. The wavelet is one of the well-known approaches for processing the EEG signal in time–frequency domain analysis. The wavelet is better than the traditional Fourier Transform because it has good time–frequency localized properties and multi-resolution analysis where the transient information of an EEG signal can be extracted efficiently. Thus, this review article aims to comprehensively describe the application of the wavelet method in denoising the EEG signal based on recent research. This review begins with a brief overview of the basic theory and characteristics of EEG and the wavelet transform method. Then, several wavelet-based methods commonly applied in EEG dataset denoising are described and a considerable number of the latest published EEG research works with wavelet applications are reviewed. Besides, the challenges that exist in current EEG-based wavelet method research are discussed. Finally, alternative solutions to mitigate the issues are recommended.
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Abbreviations
- AC:
-
Alternating current
- AMUSE:
-
Algorithms for multiple unknown signals extraction
- AWICA:
-
Automatic wavelet independent component analysis
- BIT:
-
Brain imaging tools
- BSS:
-
Blind source separation
- EEG:
-
Electroencephalography
- CCA:
-
Canonical correlation analysis
- CWT:
-
Continuous wavelet transform
- DC:
-
Direct current
- DFA:
-
Detrended fluctuation analysis
- DOST:
-
Discrete orthonormal S-Transform
- DWT:
-
Discrete wavelet transform
- ECG:
-
Electrocardiography
- EMD:
-
Empirical mode decomposition
- EMG:
-
Electromyography
- EOG:
-
Electrooculography
- ERP:
-
Event-related potentials
- fMRI:
-
Functional magnetic resonance imaging
- FRWT:
-
Fractional wavelet transform
- FT:
-
Fourier transform
- FWT:
-
Fast wavelet transform
- GSR:
-
Galvanic skin response
- GUI:
-
Graphical user interface
- Hz:
-
Hertz
- IDWT:
-
Inverse discrete wavelet transform
- JADE:
-
Joint approximate diagonalization
- MEG:
-
Magnetoencephalography
- MRI:
-
Magnetic resonance imaging
- MSE:
-
Mean square error
- mV:
-
Millivolt
- NIRS:
-
Near-infrared spectroscopy
- NREM:
-
Non-rapid eye movement sleep
- PCA:
-
Principal component analysis
- PET:
-
Positron emission tomography
- PSNR:
-
Peak-to-noise signal ratio
- SOBI:
-
Second order blind identification
- STFT:
-
Short-time Fourier transform
- SWT:
-
Stationary wavelet transform
- VMD:
-
Variational mode decomposition
- WPD:
-
Wavelet packet decomposition
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Acknowledgments
The authors would like to acknowledge the financial support provided by the Malaysia Ministry of Higher Education and Universiti Teknologi Malaysia under UTMER grant Q.J130000.2651.17J69 and UTMER grant Q.J130000.3851.20J75. One of the authors, Syarifah Noor Syakiylla Binti Sayed Daud is a Researcher of Universiti Teknologi Malaysia under the Post-Doctoral Fellowship Scheme (Q.J130000.21A2.05E52) for the Project: “Brain Features Extraction using Wavelet Transform Approach for Detection of Visual Memory Improvement and Stress Reduction”.
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Daud, S.N.S.S., Sudirman, R. Wavelet Based Filters for Artifact Elimination in Electroencephalography Signal: A Review. Ann Biomed Eng 50, 1271–1291 (2022). https://doi.org/10.1007/s10439-022-03053-5
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DOI: https://doi.org/10.1007/s10439-022-03053-5