5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Improving Accuracy of Telephony-based, Speaker-Independent Speech Recognition

Daniel Azzopardi, Shahram Semnani, Ben Milner, Richard Wiseman

BT Labs, UK

A combination of techniques for increasing recognition accuracy has been developed for an automated corporate directory system with 120,000 entries. Using a traditional recogniser an accuracy of around 60% has previously been obtained for both a 156 town name task and 1108 road name task. Techniques presented in this paper comprise front-end modifications, context dependent models, improved lexicon and noise modelling. This resulted in an increased recognition accuracy of around 90%.

Full Paper

Bibliographic reference.  Azzopardi, Daniel / Semnani, Shahram / Milner, Ben / Wiseman, Richard (1998): "Improving accuracy of telephony-based, speaker-independent speech recognition", In ICSLP-1998, paper 0543.