The effect of part-of-speech on Mandarin speech recognition

This paper concentrates on the effect of part-of-speech on Mandarin speech recognition by incorporating it into language model and pronunciation dictionary. This work is motivated by the two benefits of part-of-speech, one is to reduce the lexical ambiguity in language model to some extent and the other is to provide some information about the pronunciation of heteronyms. The experiments conducted on two corpora, tagged manually or automatically, show that a 3% relative character error rate (CER) reduction is achieved. Moreover, we find that performance improvement is mainly due to the relationship between part-of-speech and pronunciation of heteronyms.