pysptk.sptk.mgcep¶
-
pysptk.sptk.
mgcep
()¶ Mel-generalized cepstrum analysis
Parameters: - windowed : array, shape (frame_len)
A windowed frame
- order : int
Order of mel-generalized cepstrum. Default is 25.
- alpha : float
All pass constant. Default is 0.35.
- gamma : float
Parameter of generalized log function. Default is 0.0.
- num_recursions : int
Number of recursions. Default is len(windowed) - 1.
- miniter : int
Minimum number of iteration. Default is 2.
- maxiter : int
Maximum number of iteration. Default is 30.
- threshold : float
Threshold. Default is 0.001.
- etype : int
- Type of paramter e
- not used
- initial value of log-periodogram
- floor of periodogram in db
Default is 0.
- eps : float
Initial value for log-periodogram or floor of periodogram in db. Default is 0.0.
- min_det : float
Mimimum value of the determinant of normal matrix. Default is 1.0e-6.
- itype : float
- Input data type:
- windowed signal
- log amplitude in db
- log amplitude
- amplitude
- periodogram
Default is 0.
- otype : int
- Output data type
- mel generalized cepstrum: (c~0…c~m)
- MGLSA filter coefficients: b0…bm
- K~,c~‘1…c~’m
- K,b‘1…b’m
- K~,g*c~‘1…g*c~’m
- K,g*b‘1…g*b’m
Default is 0.
Returns: - mgc : array, shape (order + 1)
mel-generalized cepstrum
Raises: - ValueError
- if invalid itype is specified
- if invalid etype is specified
- if nonzero eps is specified when etype = 0
- if negative eps is specified
- if negative min_det is specified
- if invalid otype is specified
- RuntimeError
- if error happened in theq