| Experimental study on the naturalness of synthetic speech |
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| 作者姓名： | LU Shinan ZHANG Jialu and QI Shiqian |
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| 作者单位： | Institute of Acoustics. Academia Sinica，Beijing 100080 |
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| 基金项目： | The Project is supported by the foundation of director of IAAS |
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| 摘 要： | In the past 10 years a Chinese text-to-speech system including aphonetic library,static tone model and basic synthesis rules had been estab-lished in IAAS.The Chinese synthesis of unrestricted vocabulary had beenachieved,but further steps must be taken to improve the naturalness ofsynthesized Chinese.The effect of segmental and suprasegmental features ofsynthetic speech upon naturalness have been studied by use of subjective as-sessment method.The results show that the rhythm in time domain andcoarticulation occupy a basic position for improving the naturalness of synthet-ic speech.And the fundamental frequency curve decided by tone model onlysuit to synthesize short sentence of Chinese.If the synthesis of larger linguisticunit than simple sentence is considered,the fundamental frequency curveshould be carefully manipulated.This paper presents the experimental methodand results,and discusses the way how to improve the naturalness of syntheticChinese.
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Experimental study on the naturalness of synthetic speech |
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| Authors: | LU Shinan ZHANG Jialu and QI Shiqian |
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| Abstract: | In the past 10 years a Chinese text-to-speech system including a phonetic library, static tone model and basic synthesis rules had been established in IAAS1]. The Chinese synthesis of unrestricted vocabulary had been achieved, but further steps must be taken to improve the naturalness of synthesized Chinese. The effect of segmental and suprasegmental features of synthetic speech upon naturalness have been studied by use of subjective assessment method. The results show that the rhythm in time domain and coarticulation occupy a basic position for improving the naturalness of synthetic speech. And the fundamental frequency curve decided by tone model only suit to synthesize short sentence of Chinese. If the synthesis of larger linguistic unit than simple sentence is considered, the fundamental frequency curve should be carefully manipulated. This paper presents the experimental method and results, and discusses the way how to improve the naturalness of synthetic Chinese. |
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| Keywords: | Chinese synthesis Subjective assessment Naturalness |
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