Posterior-based out of vocabulary word detection in telephone speech
Stefan Kombrink, Lukáš Burget, Pavel Matějka, Martin Karafiát, Hynek Heřmanský · 2009
In this paper we present an out-of-vocabulary word detector suitable for English conversational and read speech. We use an approach based on phone posteriors created by a Large Vocab-ulary Continuous Speech Recognition system and an additional phone recognizer, that allows detection of OOV and misrecog-nized words. In addition, the recognized word output can be transcribed more detailed using several classes. Reported re-sults are on CallHome English and Wall Street Journal data. Index Terms: confidence measures, out-of-vocabulary word detection, phone posteriors, neural net, OOV