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A Synthesis Instance Pruning Approach Based on Virtual Non-uniform Replacements

A Synthesis Instance Pruning Approach Based on Virtual Non-uniform Replacements,10.1016/S1007-0214(08)70082-8,Tsinghua Science & Technology,Wei Zhang,

A Synthesis Instance Pruning Approach Based on Virtual Non-uniform Replacements  
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The employment of non-uniform processes assists greatly in the corpus-based text-to-speech (TTS) system to synthesize natural speech. However, tailoring a TTS voice font, or pruning redundant synthesis instances, usually results in loss of non-uniform synthesis instances. In order to solve this problem, we propose the concept of virtual non-uniform instances. According to this concept and the synthesis frequency of each instance, the algorithm named StaRp-VPA is constructed to make up for the loss of non-uniform instances. In experimental testing, the naturalness scored by the mean opinion score (MOS) remains almost unchanged when less than 50% instances are pruned, and the MOS is only slightly degraded for reduction rates above 50%. The test results show that the algorithm StaRp-VPA is effective.
Journal: Tsinghua Science & Technology , vol. 13, no. 4, pp. 515-521, 2008
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