【作者】 张凯； 严普强；

【Author】 Zhang Kai Yan Pu-qiang (Dept. of Precision Instruments, Tsing Hua Univ.)

【机构】 清华大学精密仪器及机械学系；

【摘要】 本文提出了一种基于MF10型开关电容滤波器的汉语浊音基频提取技术,该方案充分考虑了语音浊音的信号特点和开关电容滤波技术的优异的频率调节特性与外围电路简单特性, 实现了对非特定人语音浊音的基频实时提取。改进了迟滞比较器的设计,提出了一种动态阈值比较器,使之能更好地兼顾比较精度与稳定性之间的矛盾,扩大可处理语音信号的动态范围。更多还原

【Abstract】 A Chinese speech pitch extraction technique, based on MF10 switched capacitor filter (SCF), which takes thorough consideration of characteristics of signals of Chinese speech, excellent performance of frequency adjustment of SCFs and simplicity of peripheral circuits, is presented in this paper. Real-time speaker independent pitch extraction is achieved. With the improvement of the design of hysteresis comparators, a new type of dynamic threshold comparator is suggested, which can better balance between precision and stability of comparators and extend signal dynamic range.更多还原