5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Modeling of Output Probability Distribution to Improve Small Vocabulary Speech Recognition in Adverse Environments

David Thambiratnam, Sridha Sridharan

Queensland University of Technology, Australia

This paper presents a solution to the adverse environment, open microphone problem, by using the information stored in HMM output probability distributions to obtain a confidence measure of the results. This information can also be used to perform a secondary classification and improve recognition results. The system was tested on data from the TI46 database that had been corrupted by noise from the NOISEX-92 database, as well as on real-world data, and shows promising results.

Full Paper

Bibliographic reference.  Thambiratnam, David / Sridharan, Sridha (1998): "Modeling of output probability distribution to improve small vocabulary speech recognition in adverse environments", In ICSLP-1998, paper 0308.