改进的频域基音检测算法

在语音信号的低码率参数编码算法中，准确地提取基音信息是一个重要环节，文中对基于正弦波语音模型的频域基音检测算法的运算量大、易受共振峰干扰等问题提出了改进，改进后算法的运算量小，算法的准确性高，有效地减小了共振峰对频域基音检测算法的影响，模拟实验表明，改进算法的运算量仅为原算法的13%。

Modified Frequency Domain Pitch Detection Algorithm

Accurate pitch detection is an important part in low bit rate parameter speech coding. McAulay et al proposed a computationally demanding method for pitch estimation based on a sinusoidal speech model that is subjective to formant. This paper presented a modified algorithm that improves the original approach in complexity reduction, increases the accuracy of pitch detection and minimizes the interference to pitch detection. The informal experiments show that the computation of the algorithm is reduced by a factor of 13%.