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In this paper, a different HMM structure is proposed to model the context-dependent spectral characteristics of a speech unit in order to improve synthetic speech fluency. Instead of using decision trees, we reduce the huge amount of context combinations based on the articulatory knowledge of phonemes. To evaluate the proposed HMM structure, three Mandarin speech synthesis systems using different...
In this paper, we study a different spectral mapping mechanism based on linear multivariate regression (LMR). Such LMR based spectral mapping methods are intended to alleviate the problem of spectral over-smoothing usually encountered by a GMM based method. First, we derive a solution formula to determine the best LMR mapping matrix. Then, for experimental evaluation, we record a parallel corpus,...
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