slpcep

Usage: slpcep [options] ifile ofile

LPC-based cepstral analysis of a speech signal. This program takes as input a signal and outputs a LPCEPSTRA SPro data file. For each frame in the input signal, the prediction coefficients $a_i$ are computed as in slpc. Option -order=n sets the LPC analysis order which defaults to 16. The cepstral coefficients are then computed using the recursion

$$c_{i} = -a_{i} + \frac{1}{i} \sum_{j=1}{i-1} \left( (i-j) a_{j} c_{i-j} \right) \mbox{ for } i=1,\ldots,N$$

where P is the order of the cepstral analysis defined using the -num-ceps=n option (default is 16). As for sfbcep, the -cms[=n] option turns on the long term cepstral mean subtraction and -lifter=n sets the liftering value.