應用錯誤型態分析於英語發音輔助學習 (English pronunciation assisted learning using error type analysis) [In Chinese]

摘要 語言教學方法主要是由以互動理論 (interactionist theories) 為基礎的溝通式教學法 (communicative language teaching) 所主導。因此,如果要針對學生個別的問題進行糾正,需要甚 多的時間,很難採用雙向互動的教學方法。要解決這樣的問題,電腦輔助語言學習系統 (Computer Assisted Language Learning System, CALL) 是個可行的方案。利用語音辨識 (Automatic Speech Recognition, ASR) 技術的電腦輔助發音訓練系統 (Computer Assisted Pronunciation Training, CAPT) 不但可以提供一個沒有壓力的環境,讓學生反覆的練習,同時也能針對學生個別的發音 問題,提供回饋與糾正的功能。本論文應用語音辨識、錯誤型態分析、及三維唇型動畫等技術, 建立一套適合台灣人之發音輔助教學及矯正系統。本論文的主要技術包括:(1)利用語音辨識技 術,將使用者輸入的語音訊號轉變為音素序列,以進行發音錯誤分析。(2)針對台灣學生可能的 發音錯誤類型建立發音網路,偵測發音錯誤的位置及發音錯誤的型態,並針對錯誤的發音,進而 提供適當的糾正。(3)依據訓練語句之熵值 (entropy) 與使用者的個人發音錯誤類型動態的挑選 測試句。(4)運用影像處理及 3D 動畫的合成,建立一 3D 虛擬人形動畫回饋系統,且特別針對 發音時之唇型及舌位,給予使用者正確的發音動作。本論文研發之系統,未來將可提供於本國語 者英語發音學習與發音矯正等範疇的實務應用。

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