COST278 and ISCA Tutorial and Research Workshop (ITRW) on Robustness Issues in Conversational Interaction

University of East Anglia, Norwich, UK
August 30-31, 2004

Automatic Recognition of Spontaneously Dictated Medical Records for Norwegian

Bojana Gajic, Vidar Markhus, Svein Gunnar Pettersen, Magne Hallstein Johnsen

Department of Electronics and Telecommunications, Norwegian University of Science and Technology

Automatic transcription of spontaneously dictated medical records has a large potential for improving the quality and reducing the cost of patient care in Norwegian hospitals. In this paper, we describe the design of an evaluation database for this task, and study the occurrence of typical disfluencies. Furthermore, we study the improvements of word accuracy obtained by the use of speaker adaptation and different methods of modeling speaker generated noise.

Explicit modeling of speaker generated noise gave 6.5% improvement across all speakers, while the improvements for the individual speakers ranged up to 14%. Speaker adaptation gave additional 20% improvement accross all speakers, while the improvements for the individual speakers ranged up to 34%.

The best overall word accuracy is still of only approximately 50%, which is far below the requirement for a practical system. It is however expected that a considerable improvement could be achieved by training an appropriate language model.

Full Paper

Bibliographic reference.  Gajic, Bojana / Markhus, Vidar / Pettersen, Svein Gunnar / Johnsen, Magne Hallstein (2004): "Automatic recognition of spontaneously dictated medical records for norwegian", In Robust2004, paper 43.