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Sparse Gaussian Graphical Models for Speech Recognition

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    Rights statement: © Bell, P., & King, S. (2007). Sparse Gaussian Graphical Models for Speech Recognition. In Interspeech 2007: 8th Annual Conference of the International Speech Communication Association. (pp. 2113-2116)

    Accepted author manuscript, 125 KB, PDF document

Original languageEnglish
Title of host publicationInterspeech 2007
Subtitle of host publication8th Annual Conference of the International Speech Communication Association
Pages2113-2116
Number of pages4
Publication statusPublished - 1 Aug 2007

Abstract

We address the problem of learning the structure of Gaussian graphical models for use in automatic speech recognition, a means of controlling the form of the inverse covariance matrices of such systems. With particular focus on data sparsity issues, we implement a method for imposing graphical model structure on a Gaussian mixture system, using a convex optimisation technique to maximise a penalised likelihood expression. The results of initial experiments on a phone recognition task show a performance improvement over an equivalent full-covariance system.

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