Survey of Automatic Pronunciation Error Detection

To detect the pronunciation errors and correct them is very important for pronunciation learning.The Automatic Pronunciation Error Detection(APED) is the technique of detecting pronunciation errors in the speech stream,which is one of the main research issues in the Computer Assisted Pronunciation Training(CAPT) area. This paper reviews the literature on the techniques,introducing in detail three APED methods:the automatic speech recognition(ASR) based APED,the pronunciation error networks based APED and the acoustic-phonetic approach. It also summarizes the applications of APED in CAPT,and the automatic pronunciation evaluation technologies for mandarin..Finally,the paper gives some analysis and suggestions for research on automatic pronunciation error detection.