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Variational Bayes Factor Analysis for i-Vector Extraction

11/20/2015

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by Jesús Villalba, et al.

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In this document we are going to derive the equations needed to implement a Variational Bayes i-vector extractor. This can be used to extract longer i-vectors reducing the risk of overfittig or to adapt an i-vector extractor from a database to another with scarce development data. This work is based on Patrick Kenny's joint factor analysis and Christopher Bishop's variational principal components.

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