According to the limitation and the stability of the speech pitch, the LV-AMDF method was improved, and an adaptive speech pitch determination method was proposed.

• 摘要根据语音信号的基音周期范围有限和周期相对稳定的特点，改进了可变长平均幅度差函数法(LV-AMDF)，提出一种自适应幅度差法检测基音周期。