本文运用动态规划技术，提出了一种实用的双向跟踪基音周期平滑算法．实验结果表明，在用多带激励时域自相关法估计基音周期时，结合该算法对基音周期进行双向跟踪平滑处理，可显著提高基音周期估计的准确度 This paper presents a practical two-way tracking pitch cycle smoothing algorithm using dynamic programming techniques. The experimental results show that when using multi-band excitation time-domain autocorrelation method to estimate the pitch period, combined with the algorithm, the pitch period is tracked and smoothed bidirectionally, which can significantly improve the accuracy of the pitch period estimation