Time-Frequency Analysis of EEG Based on Event Related Cognitive Task
Compared with traditional time analysis and frequency analysis, time-frequency analysis of EEG not only reveals more abundant information but also reflects their dynamic temporal oscillatory activities. Event related potential (ERP) is a kind of cognitive electroencephalogram (EEG) signal, which are directly related with task and average across spontaneous EEG. Effective time-frequency representation method and how to analyze EEG based on the event related cognitive task in time-frequency domain according to their experiment speciality are the hot study at present. In current paper, a new time-frequency method about filter bank and Hilbert transform (FBHT) was introduced, and the application for ERP and ER-EEG signal were explored in order to mine new information effectively during the classic Stroop cognitive task.
KeywordsStroop Task Wavelet Packet Wigner Distribution Wavelet Packet Decomposition High Time Frequency
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