| 摘要 |
PCT No. PCT/GB89/00846 Sec. 371 Date Feb. 25, 1991 Sec. 102(e) Date Feb. 25, 1991 PCT Filed Jul. 25, 1989 PCT Pub. No. WO90/01203 PCT Pub. Date Feb. 8, 1990.A speech synthesizer (3) produces prompts in the voice of a native speaker of a language to be learned to which the student replies or imitates. A phrase recognizer (1) employs keyword recognition to generate from the student's prompted response an original speech template spoken by the student. Thereafter, interactive dialogue takes place. The student's progress in that dialogue is monitored by measuring the deviation of the student's current speech from his original speech template. When this deviation is sufficiently large so that the recognizer (1) no longer recognizes what the student is saying, the system retrains and updates the student's speech template. In another embodiment, the system includes a display which shows the native speaker's mouth shape while the words to be imitated are spoken by the speech synthesizer (3). Also provided are a video pick-up and analyzer for analyzing the shapes of the student's mouth to give the student visual feedback. |
