Method and system for evaluating Chinese mandarin retroflex suffixation pronunciation quality

The invention discloses a method and a system for evaluating Chinese mandarin retroflex suffixation pronunciation quality and relates to a pronunciation evaluating method and a pronunciation evaluating system. On the basis of the existing pronunciation quality evaluating methods, pronunciation space of standard Chinese initials and finals is expanded to allow the Chinese initials and finals to include all retroflex finals so as to build a expanded Chinese initial and final model including the retroflex finals, and larger-range pronunciation quality evaluation is performed in the expanded pronunciation space including the retroflex finals; and during pronunciation quality evaluation in the expanded pronunciation space including the retroflex finals, retroflex suffixation pronunciation quality evaluation is converted into retroflex suffixation pronunciation quality categorization to build a retroflex suffixation pronunciation quality categorization model, retroflex suffixation pronunciation quality grade is obtained by extracting acoustic features, linguistic features, statistical features and dynamic change features of retroflex suffixation and syllables followed by the retroflex suffixation, retroflex suffixation pronunciation quality evaluation is completed, and accuracy of Chinese mandarin retroflex suffixation pronunciation quality evaluation can be increased effectively.