A new loss function for speaker recognition with deep neural network is proposed, based on Jeffreys Divergence. Adding this divergence to the cross-entropy loss function allows to maximize the target value of the output distribution while smoothing the non-target values. This objective function provides highly discriminative features. Beyond this effect, we propose a theoretical justification of its effectiveness and try to understand how this loss function affects the model, in particular the impact on dataset types (i.e. in-domain or out-of-domain w.r.t the training corpus). Our experiments show that Jeffreys loss consistently outperforms the state-of-the-art for speaker recognition, especially on out-of-domain data, and helps limit false alarms.
@article{arxiv.2312.16885,
title = {Jeffreys divergence-based regularization of neural network output distribution applied to speaker recognition},
author = {Pierre-Michel Bousquet and Mickael Rouvier},
journal= {arXiv preprint arXiv:2312.16885},
year = {2023}
}