CUED Publications database

Factor analysis based VTS discriminative adaptive training

Flego, F and Gales, MJF (2012) Factor analysis based VTS discriminative adaptive training. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. pp. 4669-4672. ISSN 1520-6149

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Abstract

Vector Taylor Series (VTS) model based compensation is a powerful approach for noise robust speech recognition. An important extension to this approach is VTS adaptive training (VAT), which allows canonical models to be estimated on diverse noise-degraded training data. These canonical model can be estimated using EM-based approaches, allowing simple extensions to discriminative VAT (DVAT). However to ensure a diagonal corrupted speech covariance matrix the Jacobian (loading matrix) relating the noise and clean speech is diagonalised. In this work an approach for yielding optimal diagonal loading matrices based on minimising the expected KL-divergence between the diagonal loading matrix and "correct" distributions is proposed. The performance of DVAT using the standard and optimal diagonalisation was evaluated on both in-car collected data and the Aurora4 task. © 2012 IEEE.

Item Type: Article
Uncontrolled Keywords: adaptive training generative processes noise robustness Speech recognition
Subjects: UNSPECIFIED
Divisions: Div F > Machine Intelligence
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:25
Last Modified: 08 Dec 2014 02:35
DOI: 10.1109/ICASSP.2012.6288960