pysptk.sptk.mfcc¶

pysptk.sptk.mfcc(x, order=14, fs=16000, alpha=0.97, eps=1.0, window_len=None, frame_len=None, num_filterbanks=20, cepslift=22, use_dft=False, use_hamming=False, czero=False, power=False)¶

MFCC

Parameters:	x : array A input signal order : int, optional Order of MFCC. Default is 14. fs : int, optional Sampling frequency. Default is 160000. alpha : float, optional Pre-emphasis coefficient. Default is 0.97. eps : float, optional Flooring value for calculating `log(x)` in filterbank analysis. Default is 1.0. window_len : int, optional Window lenght. Default is `len(x)`. frame_len : int, optional Frame length. Default is `len(x)`. num_filterbanks : int, optional Number of mel-filter banks. Default is 20. cepslift : int, optional Liftering coefficient. Default is 22. use_dft : bool, optional Use DFT (not FFT) or not. Default is False. use_hamming : bool, optional Use hamming window or not. Default is False. czero : bool, optional If True, `mfcc` returns 0-th coefficient as well. Default is False. power : bool, optional If True, `mfcc` returns power coefficient as well. Default is False.
Returns:	cc : array MFCC vector, which is ordered as: mfcc[0], mfcc[1], mfcc[2], … mfcc[order-1], c0, Power. Note that c0 and Power are optional. Shape of `cc` is: `order` by default. `orde + 1` if `czero` or `power` is set to True. `order + 2` if both `czero` and `power` is set to True.
Raises:	ValueError if `num_filterbanks` is less than or equal to `order`