一种改进的基音检测算法

提出了一种改进的基音检测算法，通过最小化重建谐振峰与原始谐振峰之间的误差得到最佳的基音估计。在基音估计中引入误差控制因子以得到无偏的误差函数，同时对基音轨迹跟踪技术作了改进，以保证基音轨迹的正确演变。实验结果表明，与ＩＭＢＥ标准中的基音检测算法相比，该方法能够提供更正确且平滑的基音轨迹，尤其在过渡段能有效地跟踪快速基音变化，从而使重建语音具有更好的连续性和主观质量。

A Modified Pitch Detection Algorithm

A modified pitch detection algorithm was presented. The optimal pitch was selected by minimizing the difference between reconstructed and original harmonic lines. A controlling factor was introduced in the error function during pitch estimation and the pitch tracking techniques were modified greatly. The experimental results show that the proposed method can provide a more accurate and smoother pitch tracking than that of IMBE, and the reconstructed speech is more continuous.