On the influence of hyperarticulated speech on recognition performance
Hagen Soltau, Alex Waibel · 1998
Since we cannot exclude that speech recognizers fail sometimes, it is important to examine how users react to recognition errors. In correction situations, speaking style becomes more accentuated to disambiguate the original mistake. We examine the effect of speaking style in such situations on speech recognition performance. Our results indicate that hyperarticulated effects occur in correction situations and decrease word accuracy significantly. 1. INTRODUCTION Considerable progress has been achieved in speech recognition over the last years through techniques such as vocal tract length normalization (VTLN), maximum likelihood linear regression (MLLR) or speaker adapted training. However, even in dictation applications with 95% word accuracy (WA) it is often necessary to correct word errors. Studies [5] show that a user can lose a lot of time through error correction that he won through dictating instead of typing. Since recognition systems will always exhibit some errors it is impo...