Seq2Seq Attentional Siamese Neural Networks for Text-dependent Speaker Verification

In this paper, we present a Sequence-to-Sequence Attentional Siamese Neural Network (Seq2Seq-ASNN) that leverages temporal alignment information for end-to-end speaker verification. In prior works of speaker discriminative neural networks, utterance-level evaluation/enrollment speaker representations are usually calculated. Our proposed model, utilizing a sequence-to-sequence (Seq2Seq) attention mechanism, maps the frame-level evaluation representation into enrollment feature domain and further generates an utterance-level evaluation-enrollment joint vector for final similarity measure. Feature learning, attention mechanism, and metric learning are jointly optimized using an end-to-end loss function. Experimental results show that our proposed model outperforms various baseline methods, including the traditional i-Vector/PLDA method, multi-enrollment end-to-end speaker verification models, d-vector approaches, and a self attention model, for text-dependent speaker verification on a Tencent internal voice wake-up dataset.