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语调是语音分析和合成领域关注的重要课题,可计算的语调模型是实现语调控制的关键。该文分析了大规模语句的音节音高在句子中的变化,归纳了语调模式。陈述语调主要表现为基调的升降和音高下倾;疑问语调主要特点是疑问焦点的音高提升和调型变化。该文提出了一种陈述语调归一化描述方法,以及疑问语调调型差异模型。利用基于隐Markov模型的语音合成系统的控制机制,实现了对语调的控制。实验表明:基于陈述句语调归一化描述方法模拟了陈述句语调的变化,基于疑问语调调型差异模型实现了陈述到疑问语调的转换。语调控制使合成语音的表现力得到了提高。
Intonation is an important topic in the field of speech analysis and synthesis. The computable intonation model is the key to the realization of intonation control. This paper analyzes the large-scale sentences in the syllable pitch changes in the sentence, summed up the intonation pattern. The tone of the statement is mainly the rise and fall of the tone and the dip of the pitch; the main features of the question intonation are the rise of the pitch of the questionable focus and the change of the pattern. In this paper, we present a method of describing the normalized description of the intonation and the model of the interrogative tonal adjustment. Using the control mechanism of speech synthesis system based on hidden Markov model, the control of intonation is realized. Experiments show that: based on the statement of the sentence description of the transfer of a description of the variation of the intonation of the sentence, based on the interrogative tone model of the difference between the realization of the statement to the question of the transfer of the intonation. Intonation control makes the expressiveness of synthesized speech enhanced.