基音周期估计中倍数检验算法的研究

Research of doubling check in pitch estimation

讨论了基于自相关函数法基音周期估计过程中的倍数检验和校正问题。自相关函数法是语音信号处理中的一种重要方法,但往往会把真实基音周期的倍数误判为真实的基音周期。为了防止误判,提出了倍数检验算法。实验表明:使用该算法,提高了基音周期估计的准确性,改善了基音周期轨迹的平滑度。

Based on autocorrelation function,this paper discusses algorithm of doubling check in pitch estimation. Autocorrelation function is an important algorithm in speech signal processing,but sometimes it regards pitch doubling as the true pitch by error.To avoid this misestimation,an algorithm of doubling check in pitch estimation is proposed. Experimental results show that with this algorithm,the accuracy of pitch estimation and the smoothness of pitch trace are both improved.