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To: tdt-distrib@ldc.upenn.edu
From: Paul van Mulbregt <paulvm@dragonsys.com>
Subject: ASR output
Date: Thu, 01 Jul 1999 14:22:29 -0400

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TDT'ers,

At the meeting I requested that all ASR output meet the original spec
regarding marked silences, speaker cluster and confidence. There are
two reasons for this.
The first is so that the data files run through the systems without any
changes.
Obviously a simple perl script could add X lines, insert a zero speaker
cluster id,
and add conf=NA to the lines with word records, making such runs possible.

But the second addresses why we even have multiple ASR output at all. If
the idea is rerecognize each year and get better recognition, and the TDT2
ASR rerecognition probably isn't any better (according to Rich) than the
original recognition, then results on this data don't tell us much
(assuming the two recognizers have been tuned for WER rather than to produce
good TDT output). However if the confidences are available, then the
option exists of "roverizing" the outputs and coming up with a better
recognition, and then one can start to measure the WER effect on
the ASR segmentation task.
So even though the confidences by themselves may not help
segmentation/tracking/detection performance, when used in conjunction
with other recognizers, they can help answer questions about the effect of WER
on the segmentation task, and tracking/detection without boundaries.

-- Paul

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Paul van Mulbregt, Dragon Systems Inc., Newton, MA. (617) 965-5200
email: paulvm@dragonsys.com

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Last updated Mon Jul 12 17:16:49 1999