Improving Emotion Analysis for Speech-Induced EEGs Through EEMD-HHT-Based Feature Extraction and Electrode Selection

Jing Chen, Haifeng Li, Lin Ma and Hongjian Bo
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Jing Chen: Harbin Institute of Technology, China
Haifeng Li: Harbin Institute of Technology, China
Lin Ma: Harbin Institute of Technology, China
Hongjian Bo: Shenzhen Academy of Aerospace Technology, China

International Journal of Multimedia Data Engineering and Management (IJMDEM), 2021, vol. 12, issue 2, 1-18

Abstract: Emotion detection using EEG signals has advantages in eliminating social masking to obtain a better understanding of underlying emotions. This paper presents the cognitive response to emotional speech and emotion recognition from EEG signals. A framework is proposed to recognize mental states from EEG signals induced by emotional speech: First, speech-evoked emotion cognitive experiment is designed, and EEG dataset is collected. Second, power-related features are extracted using EEMD-HHT, which is more accurate to reflect the instantaneous frequency of the signal than STFT and WT. An extensive analysis of relationships between frequency bands and emotional annotation of stimulus are presented using MIC and statistical analysis. The strongest correlations with EEG signals are found in lateral and medial orbitofrontal cortex (OFC). Finally, the performance of different feature set and classifier combinations are evaluated, and the experiments show that the framework proposed in this paper can effectively recognize emotion from EEG signals with accuracy of 75.7% for valence and 71.4% for arousal.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:igg:jmdem0:v:12:y:2021:i:2:p:1-18

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