Method and apparatus for voice-interactive language instruction

Details Method and apparatus for voice-interactive language instruction Method and apparatus for voice-interactive language instruction

G - Physics

10

L

G10L 15/14 (2006.01) G09B 19/04 (2006.01) G09B 19/06 (2006.01) G10L 15/18 (2006.01) G10L 15/22 (2006.01)

Patent

CA 2158062

Spoken-language instruction method and apparatus employ context-based speech recognition for instruction and evaluation. A finite state grammar set (113) corresponding to the range of word sequence patterns in the lesson is employed as a constraint on a hidden Markov model (HMM) search apparatus in an HMM speech recognize (112). The invention includes a system with an interactive decision mechanism which employs at least three levels of error tolerance to simulate a natural level of patience in human-based interactive instruction. A linguistically-sensitive utterance endpoint detector is provided for judging termination of a spoken utterance to simulate human turn-taking in conversational speech.

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