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- W2355214774 abstract "As the most effective confidence measure in computer assisted language learning system,the posterior probability is used widely,in which some tricks are applied to reduce the computation complexity.It analyzes the defect of the traditional algorithm and proposes some improvements.First,the traditional algorithm adopts the method of maximum instead of sum in the calculation of the denominator,which seriously reduces the accuracy of posterior probability.Therefore,taking into account both computation complexity and system performance,it proposes an algorithm based on phoneme confusion extended network.Second,in the traditional algorithm,the posterior probability is normalized by its segment time.In fact,the acoustic likelihood is more related with time and grows with the frame number.So,it proposes the acoustic likelihood based normalization algorithm.The experimental results show that compared to traditional algorithm,the proposed algorithm can improve system performance significantly,about 35% average score error rate relatively,and the computation complexity does not increased." @default.
- W2355214774 created "2016-06-24" @default.
- W2355214774 creator A5066595006 @default.
- W2355214774 date "2010-01-01" @default.
- W2355214774 modified "2023-09-25" @default.
- W2355214774 title "Experimental investigation of Putonghua pronunciation quality assessment system" @default.
- W2355214774 hasPublicationYear "2010" @default.
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