Divide, Conquer and Combine: Hierarchical Feature Fusion Network with Local and Global Perspectives for Multimodal Affective Computing

Sijie Mai, Haifeng Hu, Songlong Xing


Abstract
We propose a general strategy named ‘divide, conquer and combine’ for multimodal fusion. Instead of directly fusing features at holistic level, we conduct fusion hierarchically so that both local and global interactions are considered for a comprehensive interpretation of multimodal embeddings. In the ‘divide’ and ‘conquer’ stages, we conduct local fusion by exploring the interaction of a portion of the aligned feature vectors across various modalities lying within a sliding window, which ensures that each part of multimodal embeddings are explored sufficiently. On its basis, global fusion is conducted in the ‘combine’ stage to explore the interconnection across local interactions, via an Attentive Bi-directional Skip-connected LSTM that directly connects distant local interactions and integrates two levels of attention mechanism. In this way, local interactions can exchange information sufficiently and thus obtain an overall view of multimodal information. Our method achieves state-of-the-art performance on multimodal affective computing with higher efficiency.
Anthology ID:
P19-1046
Volume:
Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2019
Address:
Florence, Italy
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
481–492
Language:
URL:
https://aclanthology.org/P19-1046
DOI:
10.18653/v1/P19-1046
Bibkey:
Cite (ACL):
Sijie Mai, Haifeng Hu, and Songlong Xing. 2019. Divide, Conquer and Combine: Hierarchical Feature Fusion Network with Local and Global Perspectives for Multimodal Affective Computing. In Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, pages 481–492, Florence, Italy. Association for Computational Linguistics.
Cite (Informal):
Divide, Conquer and Combine: Hierarchical Feature Fusion Network with Local and Global Perspectives for Multimodal Affective Computing (Mai et al., ACL 2019)
Copy Citation:
PDF:
https://aclanthology.org/P19-1046.pdf
Data
CMU-MOSEIIEMOCAP