2008 | OriginalPaper | Buchkapitel
9. Homomorphic Systems and Cepstrum Analysis of Speech
verfasst von : Ronald W. Schafer, Prof.
Erschienen in: Springer Handbook of Speech Processing
Verlag: Springer Berlin Heidelberg
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Abstract
As an aid in formalizing this new point of view, they introduced a number of paraphrased words. For example, they defined the cepstrum of a signal as the power spectrum of the logarithm of the power spectrum of a signal. (In fact, they used discrete-time spectrum estimates based on the discrete Fourier transform.) Similarly, the term quefrency was introduced for the independent variable of the cepstrum [9.1].In general, we find ourselves operating on the frequency side in ways customary on the time side and vice versa.