Efficient and accurate pitch estimation using FFT
Efficient and accurate pitch estimation using FFT
复制标题
使用 FFT 进行高效、准确的音高估计
DOI：
10.1109/ijsis.1998.685475
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Babu
中科院分区：
文献类型：
--
作者：
M. Babu
通常从FFT中获得的正弦波的频谱信息并不能给出正弦波的确切频率位置的足够信息。当正弦波的位置与频率盒的位置不完全重合时，正弦波的功率通常在两个附近的频率盒之间分割。使用这些功率值精确的正弦波频率，因此可以确定基音频率。得到了两个解，一个精确解和一个近似解。这两种算法的结果都能很好地逼近正弦波的精确频率位置。
The spectral information of sinusoids normally available from FFT does not give enough information about the exact frequency location of the sinusoid. The power of the sinusoids is usually split between the two nearby frequency bins when the location of the sinusoid does not coincide exactly with the location of the frequency bins. Using these power values the exact sinusoid frequency and hence the pitch frequency can be determined. Two solutions, one exact and one approximate are derived. The results obtained from both the algorithms provide very good approximation to the exact frequency location of the sinusoids.