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| A Novel Voice Conversion Method Based on Codebook Mapping with PhonemeTied Weighting |
| WANG ZiXiang, DAI LiRong, WANG YuPing, WANG RenHua |
| Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027 |
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Abstract The voice conversion system framework is introduced in this paper. Further, the conventional codebook mapping method for voice conversion is discussed. This paper point out that the conventional codebook mapping method, which calculates the weighting coefficients based on whole codebooks, tends to generate overly smoothed effect on converted speech spectrum. So the converted speech quality is decreased greatly. To address this problem, a novel voice conversion method based on codebook mapping with phonemetied weighting is presented. And a new decision tree based prosodic conversion method is also proposed. The experiments show that the proposed methods can effectively convert speaker's individuality while maintaining high speech quality with only a small amount of training data.
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Received: 07 January 2005
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2006, Vol. 19 
