Power Spectral Density estimate via Welch s method.

用于语音增强中的谱估计基本方法，针对音调较低，声音较沉闷的语音可以选用改进型的谱估计方法。-Spectrum estimation for speech enhancement in the basic method for tone lower than the dull sound of the voice can choose to use the improved spectral estimation method.

1.用matlab实现对一个元音和一个清辅音的LPC系数，LPCC系数和MFCC系数的提取。 2，用LPC对这两个语音信号的功率谱进行估计，其中，LPC系数要分别有5阶，10阶，15阶和20阶四种情况，并在一个图里画出信号本身的FFT功率谱和四条不同阶数的LPC谱估计图，以作比较。注意，LPC和LPCC只考察自相关法。 3，用对数面积比的方法来求出这两个发音的变截面声管模拟图形，10阶即可-Using matlab to achieve the LPC coefficients of a

The sliding DFT is a spectral analysis method based on the classical FFT, implemented over a subset of the N center frequencies of the N-point DFT. The sliding DFT (SDFT) algorithm performs an N-point DFT on time samples within a sliding-window.