Audio-Visual Approach For Multimodal Concurrent Speaker Detection

Abstract: Concurrent Speaker Detection (CSD), the task of identifying active speakers and their overlaps in an audio signal, is essential for various audio applications, including meeting transcription, speaker diarization, and speech separation. This study presents a multimodal deep learning approach that integrates audio and visual information. The proposed model utilizes an early fusion strategy, combining audio and visual features through cross-modal attention mechanisms with a learnable [CLS] token to capture key audio-visual relationships. The model is extensively evaluated on two real-world datasets, the established AMI dataset and the recently introduced EasyCom dataset. Experiments validate the effectiveness of the multimodal fusion strategy. An ablation study further supports the design choices and the model's training procedure. As this is the first work reporting CSD results on the challenging EasyCom dataset, the findings demonstrate the potential of the proposed multimodal approach for \ac{CSD} in real-world scenarios.