Speaker: Juan Ignacio Álvarez Trejos

Abstract: Query-by-example Spoken Term Detection (QbE-STD) is a keytechnology to harness the large amount of audiovisual content that is being stored and generated nowadays. Using audio example queries for STD has several advantages such as requiring less resources (both computational and linguistic) and resulting in less language-dependent systems. A further advantage is the possibility of developing neural end-to-end models. In this paper, we explore one of these models for QbE-STD. The model starts projecting the input pair formed by a query and a segment into fixed-length vector representations. Then, a distance between these vectors is calculated to generate a detection score. To learn similarities over the projected input pair, a two-way attention model, called attentive pooling networks, has been used. Both elements in the input pair can influence the vector representation of the other, paying more attention to the frames that contain key information of both the query and the occurrence. Our main objective is to explore if this model can find similarities regardless of the language used for training. We start showing the effectiveness of the proposed model on the Librispeech corpus, and then we evaluate it on the ALBAYZIN 2020 Search-on-Speech evaluation data.