On the Detection of Retroflex and Non-retroflex for Mandarin Chinese

• Main Authors: Pai-Wei Lai, 賴百威
• Other Authors: Jyh-Shing Roger Jang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/04606452956493715578

碩士 === 國立清華大學 === 資訊工程學系 === 95 === This thesis presents the detection of retroflex and non-retroflex for Mandarin Chinese. The objective of our research is to determine whether an initial within a syllable obtained from forced alignment has the characteristics of a retroflex or not. The decision rule used in this paper is similar to speaker verification. Firstly, GMM-based retroflex and non-retroflex models are trained. Secondly, we adjust the threshold of the likelihood ratio to achieve the equal error rate (EER). In addition to MFCC, spectrum moments and formants are also used as our speech features. The experimental results indicate that spectrum moments and formants are able to improve the performance of the retroflex and non-retroflex detection rate. The best equal error rate obtained from our experiments is 17.69%.