Closed-form expressions vs. BIC: A comparison for speaker clustering | IEEE Conference Publication | IEEE Xplore

Closed-form expressions vs. BIC: A comparison for speaker clustering

Publisher: IEEE

Abstract:

In this paper, the use of closed-form expressions is compared to the BIC approximation, with respect to speaker clustering. We first show that the particular BIC setting ...View more

Abstract:

In this paper, the use of closed-form expressions is compared to the BIC approximation, with respect to speaker clustering. We first show that the particular BIC setting which is commonly used in this task, namely the approximation of the marginal with respect to the model parameters and conditional with respect to the latent variables likelihood, belongs to an exponential family, and hence admits a closed-form expression by attaching conjugate priors. We then formalize the role of the tuning parameter as a hyperparameter of the prior and finally we explain the several proposed setting global, local and segmental based on the strength of the prior. Experiments are carried out for the speaker clustering task and improvement over the BIC approximation is reported.
Date of Conference: 22-27 May 2011
Date Added to IEEE Xplore: 11 July 2011
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ISSN Information:

Publisher: IEEE
Conference Location: Prague, Czech Republic

References

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