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Proceedings ArticleDOI

Classification of motor imagery eeg using wavelet envelope analysis and LSTM networks

TLDR
A novel method based on wavelet envelope analysis and long-term short-term memory (LSTM) classifier which consider the amplitude modulation characteristics and time series information of MI-EEG to classify EEG signals into multiple classes is proposed.
Abstract
Motor imagery (MI) based brain-computer interface (BCI) facilitates a medium to translate the human motion intentions using Motor imagery electroencephalogram (EEG) into control signals. A major challenge in BCI research is the identification of non-stationary brain electrical signals to categorize human motion intentions. We propose a novel method based on wavelet envelope analysis and long-term short-term memory (LSTM) classifier which consider the amplitude modulation characteristics and time series information of MI-EEG to classify EEG signals into multiple classes. First, the Hilbert transform (HT) and discrete wavelet transform (DWT) are combined to extract significant features which contains the underlying information of both amplitude modulation and frequency modulation of the EEG signals. Then, the wavelet envelope features are input into an LSTM classifier with input gates, forget gates, and output gates for classification. Finally, the experiment was conducted on the 2003 BCI competition data set III with 5-fold cross-validation, and experimental results show that the proposed method helps achieve higher classification accuracy.

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Citations
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Journal ArticleDOI

EEG-Based Brain-Computer Interfaces Using Motor-Imagery: Techniques and Challenges.

TL;DR: In this article, state-of-the-art signal processing techniques for MI EEG-based BCIs, with a particular focus on the feature extraction, feature selection and classification techniques used.
Journal ArticleDOI

Current Status, Challenges, and Possible Solutions of EEG-Based Brain-Computer Interface: A Comprehensive Review

TL;DR: This article provides a comprehensive review of the state-of-the-art of a complete BCI system and a considerable number of popular BCI applications are reviewed in terms of electrophysiological control signals, feature extraction, classification algorithms, and performance evaluation metrics.
Journal ArticleDOI

A novel hybrid deep learning scheme for four-class motor imagery classification.

TL;DR: A hybrid deep network framework to improve classification accuracy of four-class MI-EEG signal is proposed and could be of great interest for real-life brain-computer interfaces (BCIs).
Proceedings ArticleDOI

Prediction of Depression from EEG Signal Using Long Short Term Memory(LSTM)

TL;DR: LSTM (Long-short term memory) deep learning models are used in the prediction of trends of depression for the next time instants, based on the features extracted from EEG signals.
Journal ArticleDOI

Deep learning-based BCI for gait decoding from EEG with LSTM recurrent neural network.

TL;DR: The results support for the first time the use of a memory-based deep learning classifier to decode walking activity from non-invasive brain recordings and suggest that this classifier can be a more effective input for devices restoring locomotion in impaired people.
References
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Long short-term memory

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TL;DR: In this paper, it is shown that the difference of information between the approximation of a signal at the resolutions 2/sup j+1/ and 2 /sup j/ (where j is an integer) can be extracted by decomposing this signal on a wavelet orthonormal basis of L/sup 2/(R/sup n/), the vector space of measurable, square-integrable n-dimensional functions.
Journal ArticleDOI

LSTM: A Search Space Odyssey

TL;DR: This paper presents the first large-scale analysis of eight LSTM variants on three representative tasks: speech recognition, handwriting recognition, and polyphonic music modeling, and observes that the studied hyperparameters are virtually independent and derive guidelines for their efficient adjustment.
Journal ArticleDOI

Learning to Forget: Continual Prediction with LSTM

TL;DR: This work identifies a weakness of LSTM networks processing continual input streams that are not a priori segmented into subsequences with explicitly marked ends at which the network's internal state could be reset, and proposes a novel, adaptive forget gate that enables an LSTm cell to learn to reset itself at appropriate times, thus releasing internal resources.
Journal ArticleDOI

Brain-computer interface technology: a review of the first international meeting

TL;DR: The first international meeting devoted to brain-computer interface research and development is summarized, which focuses on the development of appropriate applications, identification of appropriate user groups, and careful attention to the needs and desires of individual users.
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