Classification of Imagined Speech EEG Signals with DWT and SVM

查看全文 作　　者：ZHANG [1]Lingwei;ZHOU [1]Zhengdong;XU [1]Yunfei;JI [1]Wentao;WANG [1]Jiawen;SONG [1]Zefeng

机构地区：[1]State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Instrumentation》索引2022年第9卷第2期,共8页

基　　金：supported in part by the Fundamental Research Funds for the Central Universities(xcxjh20210104). 摘　　要：With the development of human-computer interaction technology,brain-computer interface(BCI)has been widely used in medical,entertainment,military,and other fields.Imagined speech is the latest paradigm of BCI and represents the mental process of imagining a word without making a sound or making clear facial movements.Imagined speech allows patients with physical disabilities to communicate with the outside world and use smart devices through imagination.Imagined speech can meet the needs of more complex manipulative tasks considering its more intuitive features.This study proposes a classification method of imagined speech Electroencephalogram(EEG)signals with discrete wavelet transform(DWT)and support vector machine(SVM).An open dataset that consists of 15 subjects imagining speaking six different words,namely,up,down,left,right,backward,and forward,is used.The objective is to improve the classification accuracy of imagined speech BCI system.The features of EEG signals are first extracted by DWT,and the imagined words are clas-sified by SVM with the above features.Experimental results show that the proposed method achieves an average accuracy of 61.69%,which is better than those of existing methods for classifying imagined speech tasks. 关键词：Brain-computer Interface(BCI) EEG Imagined Speech Discrete Wavelet Transform(DWT) Signal Processing Support Vector Machine(SVM)

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Classification of Imagined Speech EEG Signals with DWT and SVM

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