EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology

Aalborg, Denmark
September 3-7, 2001


Use of Acoustic Prior Information for Confidence Measure in ASR Applications

Erhan Mengusoglu, Christophe Ris

Faculté Polytechnique de Mons - TCTS lab, Belgium

In this paper, we propose a new acoustic confidence measure of ASR hypothesis and compare it to approaches proposed in the literature. This approach takes into account prior information on the acoustic model performance specific to each phoneme. The new method is tested on two types of recognition errors: the out-of-vocabulary words and the errors due to additive noise. We then propose an efficient way to interpret the raw confidence measure as a correctness prior probability.

Full Paper

Bibliographic reference.  Mengusoglu, Erhan / Ris, Christophe (2001): "Use of acoustic prior information for confidence measure in ASR applications", In EUROSPEECH-2001, 2557-2560.