Abstract:Multimodal sentiment analysis aims to assess users’ sentiment by analyzing the videos they upload on social platforms. The current research on multimodal sentiment analysis primarily focuses on designing complex multimodal fusion networks to learn the consistency information among modalities, which enhances the model’s performance to some extent. However, most of the research overlooks the complementary role played by the difference information among modalities, resulting in sentiment analysis biases. This study proposes a multimodal sentiment analysis model called DERL (dual encoder representation learning) based on dual encoder representation learning. This model learns modality-invariant representations and modality-specific representations by a dual encoder structure. Specifically, a cross-modal interaction encoder based on a hierarchical attention mechanism is employed to learn the modality-invariant representations of all modalities to obtain consistency information. Additionally, an intra-modal encoder based on a self-attention mechanism is adopted to learn the modality-specific representations within each modality and thus capture difference information. Furthermore, two gate network units are designed to enhance and filter the encoded features and enable a better combination of modality-invariant and modality-specific representations. Finally, during fusion, potential similar sentiment between different multimodal representations is captured for sentiment prediction by reducing the L2 distance among them. Experimental results on two publicly available datasets CMU-MOSI and CMU-MOSEI show that this model outperforms a range of baselines.