Compact isolated word recognition system for large vocabulary

This paper presents the development of a high-speed speaker-independent speech recognition system for a large vocabulary of Japanese words, based on phoneme recognition. The system is implemented in small size by a pair of digital signal processors and a general purpose micro-processor on three printed circuit boards. An experimental result using 212 Japanese word samples, which have been pronounced by 20 males and 20 females, showed an average word recognition rate of 95.5%. And the word recognition process completes within 0.8 second after the end of utterance.