Sixth International Conference on Spoken Language Processing
(ICSLP 2000)

Beijing, China
October 16-20, 2000

Directed Graphical Models of Classifier Combination: Application to Phone Recognition

Jeff A. Bilmes, Katrin Kirchhoff

SSLI-Laboratory, Dept. of Electrical Engineering, University of Washington, Seattle, WA, USA

Classifier combination is a technique that often provides appreciable accuracy gains. In this paper, we argue that the underlying statistical model of classifier combination should be made explicit. Using directed graphical models (DGMs), we provide representations of two common combination schemes, the mean and product rules. We also introduce new DGMs that yield novel combination rules. We find that these new DGM-inspired rules can achieve significant accuracy gains on the TIMIT phone-classification task relative to existing combination schemes.

Full Paper

Bibliographic reference.  Bilmes, Jeff A. / Kirchhoff, Katrin (2000): "Directed graphical models of classifier combination: application to phone recognition", In ICSLP-2000, vol.3, 921.