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研究生:黃經貿
研究生(外文):Huang- Ching Mao
論文名稱:電腦化華人英語口音診斷系統之原型
論文名稱(外文):Prototype Computerized Tool for Accent Diagnosis among Chinese Speakers of English as a Foreign Language
指導教授:傅家啟傅家啟引用關係
指導教授(外文):J. C. Fu
學位類別:碩士
校院名稱:大葉大學
系所名稱:工業工程研究所
學門:工程學門
學類:工業工程學類
論文種類:學術論文
論文出版年:1998
畢業學年度:86
語文別:中文
中文關鍵詞:口音診斷華人英語學習向量量化類神經網路II語音辨識
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本論文研究之目的乃應用學習向量量化類神經網路II理論及現有之語音處理技術,盼能建立出一套電腦化華人英語口音診斷辨識系統之原型。在本論文研究中,主要是對非特定語者發音,以電腦建構一口音診斷用之小型語音辨識系統。首先,吾人針對語音音素建構一套語音信號處理系統,對語者所輸入音素之語音,先做信號處理,並擷取出代表語音的特徵參數。並參照國際共同音標中各音素(IPA)特徵參數分佈的情況來建構學習向量量化神經網路系統,將擷取到的語音特徵參數作為系統之輸入,如此吾人可由系統的輸出值建立語音參考樣本。最後進行樣本比對的工作,當我們得到語音測試樣本後,將其和一組已建立好的語音參考樣本作比對,選擇和參考樣本中最為接近的語音來作為辨認結果,並求出測試語者之樣
Recent advances in phoneme-based speech recognition have raised the prospect that Computer-Assisted Language Learning technologies could help fill this gap by giving adult EFL learners access to model pronunciations of problematic words and expert feedback on their own pronunciations. This research presents the prototype of Chinese speakers English PronunciatiOn Tutorial, CEPOT), a phoneme-based word recognition system that targets the pronunciation problems peculiar to Chinese EFL speakers. The core of CEPOT is an LVQ-based phoneme detector that enables it to derive the phonetic spelling of input words. By comparing the phonetic spellings of model pronunciations and student input pronunciations, CEPOT detects omission of necessary phonemes and addition of extra phonemes. By using a clarity index, CEPOT identifies unclear phonemes within the student pronunciations.Experimental results showed that CEPOT could successfully detect omission/addition of phonemes in selected whole-word inputs. However, it was not successful in measuring pronunciation clarity because its FFT-based preprocessor could not capture the non-stationary features of the speech signals. To improve CEPOT*s performance, the further research will focus on the better understand the relationship between the phoneme input, the signal characteristics. In addition, non-stationary signal processing tool is
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