A novel transformer autoencoder for multi-modal emotion recognition with incomplete data

Multi-modal signals have become essential data for emotion recognition since they can represent emotions more comprehensively. However, in real-world environments, it is often impossible to acquire complete data on multi-modal signals, and the problem of missing modalities causes severe performance...

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Bibliographic Details
Published in:Neural networks Vol. 172; p. 106111
Main Authors: Cheng, Cheng, Liu, Wenzhe, Fan, Zhaoxin, Feng, Lin, Jia, Ziyu
Format: Journal Article
Language:English
Published: United States Elsevier Ltd 01.04.2024
Subjects:
Convolutional encoder
Emotion recognition
Incomplete data
Multi-modal signals
Transformer autoencoder
Emotion recognition
Incomplete data
Multi-modal signals
Convolutional encoder
Transformer autoencoder
ISSN:0893-6080, 1879-2782, 1879-2782
Online Access:Get full text
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Summary:Multi-modal signals have become essential data for emotion recognition since they can represent emotions more comprehensively. However, in real-world environments, it is often impossible to acquire complete data on multi-modal signals, and the problem of missing modalities causes severe performance degradation in emotion recognition. Therefore, this paper represents the first attempt to use a transformer-based architecture, aiming to fill the modality-incomplete data from partially observed data for multi-modal emotion recognition (MER). Concretely, this paper proposes a novel unified model called transformer autoencoder (TAE), comprising a modality-specific hybrid transformer encoder, an inter-modality transformer encoder, and a convolutional decoder. The modality-specific hybrid transformer encoder bridges a convolutional encoder and a transformer encoder, allowing the encoder to learn local and global context information within each particular modality. The inter-modality transformer encoder builds and aligns global cross-modal correlations and models long-range contextual information with different modalities. The convolutional decoder decodes the encoding features to produce more precise recognition. Besides, a regularization term is introduced into the convolutional decoder to force the decoder to fully leverage the complete and incomplete data for emotional recognition of missing data. 96.33%, 95.64%, and 92.69% accuracies are attained on the available data of the DEAP and SEED-IV datasets, and 93.25%, 92.23%, and 81.76% accuracies are obtained on the missing data. Particularly, the model acquires a 5.61% advantage with 70% missing data, demonstrating that the model outperforms some state-of-the-art approaches in incomplete multi-modal learning.
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ISSN:0893-6080
1879-2782
1879-2782
DOI:10.1016/j.neunet.2024.106111