Cepstrum and Complex Cepstrum
• cepstrum(v)—Returns the cepstrum of vector v.
The cepstrum of a signal is sometimes called the spectrum of a spectrum.
• ccepstrum(A)—Returns a vector or matrix containing the complex cepstrum of each column of a multichannel signal.
Arguments
• v is a real-valued vector.
• A is a vector or matrix. If A is a matrix, then ccepstrum acts upon the individual columns.
Additional Information
• The cepstrum function:
◦ maps convolution and deconvolution to addition and subtraction in the frequency domain.
◦ uses only the information of the magnitude of the spectrum, and does not allow the reconstruction of the signal.
• The complex ccepstrum function holds information about magnitude and phase of the initial spectrum, allowing the reconstruction of the signal.