Recursive Joint Cross-Attention for Audio-Visual Speaker Verification

Speaker verification has been recently gaining a lot of attention using audio-visual fusion as faces and voices share close associations with each other. Though existing approaches based on audio-visual fusion showed improvement over unimodal systems, the potential of audio-visual fusion for speaker verification is not fully exploited. In this paper, we have investigated the prospect of effectively capturing both the intra- and inter-modal relationships across audio and visual modalities simultaneously, which can play a crucial role in significantly improving the fusion performance over unimodal systems. Specifically, we introduce a recursive fusion of the joint cross-attentional model, where a joint audio-visual feature representation is employed in the cross-attention framework in a recursive fashion in order to obtain more refined feature representations that can efficiently capture the intra- and inter-modal associations. Extensive experiments are conducted on the Voxceleb1 dataset to evaluate the proposed model. Results indicate that the proposed model is found to be promising in improving the performance of the audio-visual system.