Why do we use the term "cepstral" in MFCCs, and how does it related to the cepstral domain?

Asked Jan 27 '20 at 11:19

Active Jan 27 '20 at 11:19

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As I know, we can get the cepstrum by taking the Inverse Discrete Fourier Transform (IDFT) of the log of the power spectrum.

And we can get the Mel-frequency cepstral coefficients (MFCCs) by taking the Discrete Cosine Transform (DCT) of the log filterbank energies.

But I didn't understand the following two points:

Why do we use the term "cepstral" in MFCCs when we use DCT instead of IDFT?
How does MFCCs relate to the cepstral domain according to the reference here?

asked Jan 27 '20 at 11:19

Abdulkader

Can you please have a look at this as cited in this and then perhaps amend the question with further points that may have remained unclear? – A_A Jan 28 '20 at 10:56
1

Take a look here. DCT can be treated as an IDFT in this case. – jojeck Jan 28 '20 at 11:16

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