根据基音周期平滑变化的特点，基于语音信号的准周期性进行了语音信号的基音提取。该算法主要针对多带激励模型（ＭＢＥ），采用传统的时域分析法，先用语音信号的相关性进行基音周期的估计，再由分数延迟法提取基音周期，使预测结果更加准确，更具实时性，有利于语音编码与识别。 According to the smooth change of pitch period, the pitch of speech signal is extracted based on the quasi-periodicity of speech signal. The algorithm is mainly based on the multi-band excitation model (MBE), adopts the traditional time-domain analysis method, first estimates the pitch period by the correlation of the speech signal, and then extracts the pitch period by the fractional delay method to make the prediction result more accurate and more Real-time, is conducive to voice coding and identification.