融合语音信号和脑电信号的多模态情感识别

doi:10.19665/j.issn1001-2400.2019.01.023

Abstract

Abstract:

To construct an effective emotion recognition system, the emotions of joy, sadness, anger and neutrality are induced by sound stimulation, and the corresponding speech and EEG signals are collected. First, this paper extracts the nonlinear geometric feature and nonlinear attribute feature of EEG and speech signals by phase space reconstruction respectively, and the emotion recognition is realized by combining the basic features. Then, a feature fusion algorithm based on the Restricted Boltzmann Machine is constructed to realize multimodal emotion recognition from the perspective of feature fusion. Finally, a multimodal emotion recognition system is constructed through decision fusion by using the quadratic decision algorithm. The results show that the overall recognition rate of the multimodal emotion recognition system constructed by feature fusion is 1.08% and 2.75% higher than that of speech signals and that of EEG signals respectively, and that the overall recognition rate of the multimodal emotion recognition system constructed by decision fusion is 6.52% and 8.19% higher than that of speech signals and that of EEG signals respectively. The overall recognition effect of the multimodal emotion recognition system based on decision fusion is better than that of feature fusion. A more effective emotion recognition system can be constructed by combining the emotional data of different channels such as speech signals and EEG signals.

Key words: speech signals, electroencephalo-graph signals, feature fusion, decision fusion

CLC Number:

TP391.4

MA Jianghe,SUN Ying,ZHANG Xueying. Multimodal emotion recognition for the fusion of speech and EEG signals[J].Journal of Xidian University, 2019, 46(1): 143-150.

Figures/Tables 9

References 21

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情感信号	特征类型	维数统计	特征
语音信号	基本特征	1~98	语速、平均过零率、能量、基频及共振峰、MFCC
	非线性几何特征	99~135	吸引子到圆心和标识线距离、吸引子连续轨迹到圆心距离的总长度
	非线性属性特征	136~140	Hurst 、最大Lyapunov指数
脑电信号	基本特征	141~152	功率谱熵
	非线性几何特征	153~596	吸引子到圆心和标识线距离、吸引子连续轨迹到圆心距离的总长度
	非线性属性特征	597~668	Hurst 、最大Lyapunov指数、近似熵

情感信号	情感类型				平均识别率
情感信号	悲伤	生气	高兴	中性	平均识别率
语音信号	71.43	85.71	85.71	78.57	80.36
脑电信号	96.00	75.75	76.25	66.75	78.69
特征融合	85.00	84.75	81.25	74.75	81.44

实验类型	特征类型	情感类型				平均识别率
实验类型	特征类型	悲伤	生气	高兴	中性	平均识别率
单类特征分类	非线性几何特征	85.50	81.50	82.25	81.75	82.75
	非线性属性特征	95.04	7.62	72.31	84.72	64.92
	基本特征	79.25	86.00	96.00	73.50	83.69
DS融合	非线性全局特征	83.75	82.50	81.50	80.55	82.08
二次决策	情感特征全集	81.75	85.75	97.00	83.00	86.88

Multimodal emotion recognition for the fusion of speech and EEG signals

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