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Conference Papers Year : 2015

Audio-Visual Speech-Turn Detection and Tracking

Abstract

Speaker diarization is an important component of multi-party dialog systems in order to assign speech-signal segments among participants. Diariza-tion may well be viewed as the problem of detecting and tracking speech turns. It is proposed to address this problem by modeling the spatial coincidence of visual and auditory observations and by combining this coincidence model with a dynamic Bayesian formulation that tracks the identity of the active speaker. Speech-turn tracking is formulated as a latent-variable temporal graphical model and an exact inference algorithm is proposed. We describe in detail an audiovisual discriminative observation model as well as a state-transition model. We also describe an implementation of a full system composed of multi-person visual tracking, sound-source localization and the proposed online diarization technique. Finally we show that the proposed method yields promising results with two challenging scenarios that were carefully recorded and annotated.
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Dates and versions

hal-01163659 , version 1 (15-06-2015)

Identifiers

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Israel Dejene Gebru, Silèye Ba, Georgios Evangelidis, Radu Horaud. Audio-Visual Speech-Turn Detection and Tracking. 12th International Conference on Latent Variable Analysis and Signal Separation, LVA/ICA 2015, Aug 2015, Liberec, Czech Republic. pp.143-151, ⟨10.1007/978-3-319-22482-4_17⟩. ⟨hal-01163659⟩
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