Personal VAD: Speaker-Conditioned Voice Activity Detection

Abstract:In this paper, we propose "personal VAD", a system to detect the voice activity of a target speaker at the frame level. This system is useful for gating the inputs to a streaming on-device speech recognition system, such that it only triggers for the target user, which helps reduce the computational cost and battery consumption, especially in scenarios where a keyword detector is unpreferable. We achieve this by training a VAD-alike neural network that is conditioned on the target speaker embedding or the speaker verification score. For each frame, personal VAD outputs the probabilities for three classes: non-speech, target speaker speech, and non-target speaker speech. Under our optimal setup, we are able to train a model with only 130K parameters that outperforms a baseline system where individually trained standard VAD and speaker recognition networks are combined to perform the same task.

Audio and Speech Processing (eess.AS); Machine Learning (cs.LG); Machine Learning (stat.ML)

arXiv:1908.04284 [eess.AS]

(or arXiv:1908.04284v5 [eess.AS] for this version)

https://doi.org/10.48550/arXiv.1908.04284 Focus to learn more arXiv-issued DOI via DataCite

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