A vowel synthesizer based on formant sinusoids modulated by fundamental frequency
A vowel synthesizer based on formant sinusoids modulated by fundamental frequency
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一种基于基频调制的共振峰正弦波的元音合成器
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
H. Ackermann
中科院分区：
文献类型：
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作者：
I. Hertrich;H. Ackermann
提出了一种类似于并行共振峰合成器的元音合成算法。然而，共振峰被计算为幅度和相位调制的正弦波，而不是用递归滤波器或谐振器来表示。以以下方式对信号施加基频：每个基音周期表现出第一共振峰频率的持续时间π/2的初始上升；在该斜坡周期结束时，所有共振峰以预定义相角和幅度的正弦形式开始，并在每个基音周期结束时连续经历向零幅度的线性衰减。因此，相邻的音调周期彼此不影响。原则上，该算法产生的信号类似于并行共振峰合成器的输出[例如，D.H.Klatt，J.Acoust。SoC。上午好。67,971-995(1980)]。然而，通过逐个样本递增地计算共振峰的相角，允许共振峰频率在单个基音周期内连续变化。这种新的算法..。
A vowel synthesis algorithm was developed resembling parallel formant synthesizers. However, the formants are computed as amplitude-and phase-modulated sinusoids instead of being represented by recursive filters or resonators. The fundamental frequency is imposed on the signal in the following way: Each pitch period exhibits an initial rise of a duration of π/2 of the first formant frequency; at the end of this ramp period all formants start as sinusoids at predefined phase angles and amplitudes, and successively undergo linear attenuation toward zero amplitude at the end of each pitch period. Adjacent pitch periods, thus, do not influence each other. In principle, the signals produced by this algorithm are similar to the output of parallel formant synthesizers [e.g., D. H. Klatt, J. Acoust. Soc. Am. 67, 971–995 (1980)]. However, by incremental sample-by-sample computation of the formants’ phase angles, formant frequencies are allowed to continuously change within single pitch periods. This new algorithm ...