Conclusions
ad hoc retrieval in broadcast news domain appears to be a “solved problem”
- systems perform well at finding relevant passages in transcripts produced by a variety of recognizers on full unsegmented news broadcasts
- performance on own recognizer comparable to human reference
- just beginning to investigate use of non-lexical information
- Caveat Emptor
- ASR may still pose serious problems for Question Answering domain where content errors are fatal
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