Multimodal sentiment analysis with unimodal label generation and modality decomposition

Multimodal sentiment analysis aims to combine information from different modalities to enhance the understanding of emotions and achieve accurate prediction. However, existing methods face issues of information redundancy and modality heterogeneity during the fusion process, and common multimodal sentiment analysis datasets lack unimodal labels. To address these issues, this paper proposes a multimodal sentiment analysis approach based on unimodal label generation and modality decomposition (ULMD). This method employs a multi-task learning framework, dividing the multimodal sentiment analysis task into a multimodal task and three unimodal tasks. Additionally, a modality representation separator is introduced to decompose modality representations into modality-invariant representations and modality-specific representations. This approach explores the fusion between modalities and generates unimodal labels to enhance the performance of the multimodal sentiment analysis task. Extensive experiments on two public benchmark datasets demonstrate the effectiveness of this method.