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In Fourier analysis, the cepstrum (/ ˈkɛpstrʌm, ˈsɛp -, - strəm /; plural cepstra, adjective cepstral) is the result of computing the inverse Fourier transform (IFT) of the logarithm of the estimated signal spectrum. The method is a tool for investigating periodic structures in frequency spectra.

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MFCCs中文名为“ 梅尔倒频谱系数 ”（Mel Frequency Cepstral Coefficents）是一种在自动语音和说话人识别中广泛使用的特征。 它是在1980年由Davis和Mermelstein搞出来的。

在声音处理领域中，梅尔频率倒谱 (Mel-Frequency Cepstrum)是基于声音频率的非线性梅尔刻度 (mel scale)的对数能量频谱的线性变换。 梅尔频率倒谱系数 (Mel-Frequency Cepstral Coefficients，MFCCs)就是组成梅尔频率倒谱的系数。 它衍生自音讯片段的倒频谱 (cepstrum)。

Cepstral is a provider of speech synthesis technology and services. It was founded in June 2000 by scientists from Carnegie Mellon University including the computer scientists Kevin Lenzo and Alan W. Black. It is a privately held corporation with headquarters in Pittsburgh, Pennsylvania.

2019年4月9日 · 在前面的小节，我们介绍了标准倒谱（standard cepstrum），线性预测倒谱系数（Linear Prediction Cepstral Coefficients）的计算与其类似，除了LPCCs是由光滑自回归功率谱（smoothed Auto-Regressive power spectrum）计算得到的，而非功率谱 …

Cepstral builds high quality, natural sounding voices for server, desktop, and hand-held voice applications. Cepstral also provides professional services to customize and tune voices. Cepstral’s high quality text-to-speech voices are available free for trial via the Internet.

Cepstral's state of the art speech synthesis engine brings you high quality, natural sounding text to speech synthesis. Built on a decade of research and innovation, Cepstral software is used by both the largest companies in the world and the small business next door to …