Exploring Foundation Model Fusion Effectiveness and Explainability for Stylistic Analysis of Emotional Podcast Data
摘要
Emotion recognition is one of the crucial research fields for advancing affective computing. Automatic prediction using deep learning models shows poor performance while predicting valence/polarity for spoken utterances. In this paper, we investigate the effectiveness of emotion representations from a recent weakly supervised multilingual large automatic speech recognition (ASR) model along with two other self-supervised pre-trained general purpose foundation models for dimensional emotion recognition tasks from speech. We also propose a fusion architecture and demonstrate that the proposed method can achieve significantly better results compared to a state-of-the-art baseline. Moreover, we train our model with additional pairwise rank loss to further improve the prediction reliability. We further attempt to explain the prediction results using post-hoc occlusion methods demonstrating a strong relationship between the contextual construct of language and valence/polarity. Finally, we perform a comprehensive exploration of the data and labels and identify instances of verbal irony causal for individual prediction failure.