Multimodal embedding fusion for robust speaker role recognition in video broadcast

Mickael Rouvier (1) , Sebastien Delecraz (1) , Benoit Favre (1, 2) , Meriem Bendris (1) , Frédéric Bechet (1)

1 LIF - Laboratoire d'informatique Fondamentale de Marseille
2 TALEP - Traitement Automatique du Langage Ecrit et Parlé

Person role recognition in video broadcasts consists in classifying people into roles such as anchor, journalist, guest, etc. Existing approaches mostly consider one modality, either audio (speaker role recognition) or image (shot role recognition), firstly because of the non-synchrony between both modalities, and secondly because of the lack of a video corpus annotated in both modalities. Deep Neural Networks (DNN) approaches offer the ability to learn simultaneously feature representations (embeddings) and classification functions. This paper presents a multimodal fusion of audio, text and image embeddings spaces for speaker role recognition in asynchronous data. Monomodal embeddings are trained on exogenous data and fine-tuned using a DNN on 70 hours of French Broadcasts corpus for the target task. Experiments on the REPERE corpus show the benefit of the embeddings level fusion compared to the monomodal embeddings systems and to the standard late fusion method.

Mots clés: Multimodal Speaker Embeddings; Broadcast News; Speaker role recognition

Domaines: Informatique [cs]; Intelligence artificielle [cs.AI]; Apprentissage [cs.LG]; Informatique et langage [cs.CL]

Mickael Rouvier, Sebastien Delecraz, Benoit Favre, Meriem Bendris, Frédéric Bechet. Multimodal embedding fusion for robust speaker role recognition in video broadcast. Automatic Speech Recognition and Understanding, Dec 2015, Scottsdale, United States. pp.383 - 389, ⟨10.1109/ASRU.2015.7404820⟩. ⟨hal-01475413⟩