中文说明：%%%%%%倒谱是以逆傅里叶变换的结果（IFT）对一个信号的谱估计的对数。有一个真正的倒谱，复倒谱，功率倒谱，和相位倒谱。特别是功率倒谱在人类语言的分析应用。操作被称为逆倒谱分析，加权，或%%%%%%%倒谱分析。
English Description：
%%%%%%A cepstrum is the result of taking the Inverse Fourier transform (IFT) of the logarithm of the estimated spectrum of a signal. There is a complex cepstrum, a real cepstrum, a power cepstrum, and a phase cepstrum. The power cepstrum in particular finds applications in the analysis of human speech. Operations on cepstra are labelled quefrency analysis, liftering, or cepstral analysis.%%%%%%%