In the calculation of STFT, discrete Fourier transform (DFT) is replaced by autoregressive (AR) spectrum estimation, and a new method based on AR spectrum estimation is gained, namely short-time AR spectrum analysis.

• 通过对传统的短时Fourier变换进行改造；在短时Fourier变换的计算中利用自回归(AR)谱估计代替离散Fourier变换(DFT)；得到了一种基于AR谱估计的短时AR谱分析方法.