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本文着重说明如何从语音中提取音高讯号,以及如何以曲线形式表示音高变化,然后讨论普通话声调音高曲线的特性。利用非线性技术(检波器和微分电路)提取嗓音波形的“最大振幅浪纹”,然后把它转换成锯齿波。锯齿波振幅末端所形成的曲线代表语音音高变化。一般说来,普通话字音音高曲线可分为三部分,即“弯头段”、“调型段”和“降尾段”。因为四声的“调型段”音高变化具有区别性的模式,即阴平高平,阳平中升,上声低降升,去声全降,所以,“调型段”音高模式起着区别普通话四声的作用。
This article focuses on how to extract pitch signals from speech and how to characterize pitch variations in a curve, and then discuss the characteristics of a Mandarin pitch pitch curve. Extract the “maximum amplitude waviness” of the voice waveform using non-linear techniques (detector and differentiator) and convert it to sawtooth. The curve formed by the end of the sawtooth amplitude represents the change in pitch of the speech. In general, the pitch curve of Mandarin pronunciation can be divided into three parts, namely “elbow section”, “tuning section” and “tail section”. Because the four-tone “tuning section” pitch has a distinctive pattern of change, that is, Yin Ping Gao Ping, Yang Ping rise, the sound low drop, go sound all down, so the “tone section” pitch mode plays a difference Mandarin four sound effect.