대한음성학회지:말소리 (MALSORI)
- 제55권
- /
- Pages.103-118
- /
- 2005
- /
- 1226-1173(pISSN)
한국어 대어휘 연속음성 인식용 발음사전 자동 생성 및 최적화
Building a Morpheme-Based Pronunciation Lexicon for Korean Large Vocabulary Continuous Speech Recognition
초록
In this paper, we describe a morpheme-based pronunciation lexicon useful for Korean LVCSR. The phonemic-context-dependent multiple pronunciation lexicon improves the recognition accuracy when cross-morpheme pronunciation variations are distinguished from within-morpheme pronunciation variations. Since adding all possible pronunciation variants to the lexicon increases the lexicon size and confusability between lexical entries, we have developed a lexicon pruning scheme for optimal selection of pronunciation variants to improve the performance of Korean LVCSR. By building a proposed pronunciation lexicon, an absolute reduction of