cepstrum การใช้

• The cepstrum is a representation used in pitch detection and much more.
• This is accomplished by spectral factorization using the complex cepstrum.
• The real cepstrum uses only the information of the magnitude of the spectrum.
• A likely candidate for what you really want is the cepstrum of a signal.
• The " real cepstrum " uses the logarithm function defined for real values.
• The cepstrum can be seen as information about rate of change in the different spectrum bands.
• The name " cepstrum " was derived by reversing the first four letters of " spectrum ".
• The " power cepstrum " was defined in a 1963 paper by Bogert et al.
• The raw audio signal from each frame can be transformed by applying the mel-frequency cepstrum.
• The mean becomes the long term cepstrum and is typically computed on the speech part for each separate utterance.
• The complex cepstrum holds information about magnitude and phase of the initial spectrum, allowing the reconstruction of the signal.
• This peak occurs in the cepstrum because the harmonics in the spectrum are periodic, and the period corresponds to the pitch.
• Playing further on the anagram theme, a filter that operates on a cepstrum might be called a " lifter ".
• For example, the cepstrum converts a signal to the frequency domain through Fourier transform, takes the logarithm, then applies another Fourier transform.
• :complex cepstrum of signal ) ( where is the integer required to properly unwrap the angle or imaginary part of the complex log function)
• Finally, search the web for cepstrum and'pitch detection'.-- T 04 : 27, 19 January 2006 ( UTC)
• Please read the suggested answers and try to revise the details of your question to make it clear if you want cepstrum or cents or something completely different.
• Note that a pure sine wave should not be used to test the cepstrum for its pitch determination from quefrency as a pure sine wave does not contain any harmonics.
• The power cepstrum of a signal is defined as the squared magnitude of the inverse Fourier transform of the logarithm of the squared magnitude of the Fourier transform of a signal.
• Cepstrum pitch determination is particularly effective because the effects of the vocal excitation ( pitch ) and vocal tract ( formants ) are additive in the logarithm of the power spectrum and thus clearly separate.