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VARIABLE-LENGTH UNIT SELECTION USING LSA-BASED SYNTACTIC STRUCTURE COST

机译:使用基于LSA的句法结构成本的可变长度单位选择

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This paper introduces a variable-length unit selection method based on LSA-based syntactic structure for concatenative speech synthesis. First, a probabilistic context free grammar (PCFG) based parser is used to construct the syntactic structure of the input text sentence. Second, the synthesizer selects the candidate units for each node of the syntactic structure. Latent Semantic Analysis (LSA) is then adopted to estimate the syntactic cost between the target unit and the candidate units in the database. Finally, the concatenation of units with minimum cost is selected using dynamic programming algorithm. Experimental results show that variable-length unit selection based on syntactic structure outperforms the synthesizer without considering syntactic structure. Also, the LSA-based syntactic cost provides better estimation of substitution cost than that calculated only from acoustic features.
机译:本文介绍了一种基于LSA的句法结构的可变长度单位选择方法,用于连接性语音合成。 首先,用于构建输入文本句子的语法结构的基于概率的上下文免费语法(PCFG)。 其次,合成器选择句法结构的每个节点的候选单元。 然后采用潜在语义分析(LSA)来估计目标单元与数据库中的候选单元之间的语法成本。 最后,使用动态编程算法选择具有最小成本的单位的串联。 实验结果表明,基于句法结构的可变长度单位选择优于合成器而不考虑句法结构。 此外,基于LSA的句法成本可以更好地估计替代成本,而不是仅从声学特征计算的替代成本。

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