| Paper: | SP-P12.6 | ||
| Session: | Acoustic Modeling: Model Complexity, General Topics | ||
| Time: | Thursday, May 20, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Speech Processing: Acoustic Modeling for Speech Recognition | ||
| Title: | OPTIMIZING ACOUSTIC MODELS FOR COMMERCIAL SPEECH RECOGNITION USING FOREGROUND SCORES AND DATA WEIGHTING | ||
| Authors: | Daniel Boies; Nuance Communications | ||
| Brian Strope; Nuance Communications | |||
| Mitchel Weintraub; Nuance Communications | |||
| Su-Lin Wu; Nuance Communications | |||
| Abstract: | This paper describes a data-driven technique for optimizing the acoustic models for speech recognition systems that target commercial applications over telephones. Frame-averaged foreground log-likelihoods (foreground scores) correlate to recognition errors. These scores are used together with gender to optimize data weighting for the acoustic model. This process is interpreted as increasing the priors and associated parameters for poorly modeled data. The score-based optimization leads to about 7% fewer semantic errors on a live evaluation set collected after the last data used to estimate the acoustic model. | ||
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