- Alexander Hauptmann, Richard Jones, K. Seymore, Seán Slattery, M. Witbrock, M. Siegler. 1998. EXPERIMENTS IN INFORMATION RETRIEVAL FROM SPOKEN DOCUMENTS1. Abstract: This paper describes the experiments performed as p art of the TREC-97 Spoken Document Retrieval Track. The task w as to pick the correct document from 35 hours of recogniz ed speech documents, based on a text query describing exactly one document. Among the experiments we described here a re: Vocabulary size experiments to assess the effect of w rds missing from the speech recognition vocabulary; exp eriments with speech recognition using a stemmed language mo del; using confidence annotations that estimate of the correct ness of each recognized word; using multiple hypotheses from the recognizer. And finally we also measured the effects of corpus size on the SDR task. Despite fairly high word error rates, inf ormation retrieval performance was only slightly degraded fo r speech recognizer transcribed documents.
