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Extract cepstral coefficients

specifies options using one or more `coeffs`

= cepstralCoefficients(`S`

,`Name,Value`

)`Name,Value`

pair arguments.

For example, ```
coeffs =
cepstralCoefficients(S,'Rectification','cubic-root')
```

uses cubic-root
rectification to calculate the coefficients.

Given a time-frequency representation, the `cepstralCoefficients`

function performs the following operations on each spectrum, individually, as described in
[1]:

Rectifies the spectrum by applying a logarithm or cubic-root, as specified by the

`Rectification`

parameter.Transforms the rectified spectrum using the DCT-II transform.

Returns the first

`NumCoeffs`

from the cepstral representation.

[1] Rabiner, Lawrence R., and Ronald
W. Schafer. *Theory and Applications of Digital Speech
Processing*. Upper Saddle River, NJ: Pearson, 2010.

`mfcc`

| `gtcc`

| `audioDelta`

| `designAuditoryFilterBank`

| `melSpectrogram`

| `audioFeatureExtractor`

| `stft`