mpir2c

class diffsptk.MinimumPhaseImpulseResponseToCepstrum(ir_length: int, cep_order: int, n_fft: int = 512)

See this page for details.

Parameters:

ir_lengthint >= 1

The length of the impulse response, \(N\).

cep_orderint >= 0

The order of the cepstrum, \(M\).

n_fftint >> N

The number of FFT bins used for conversion. The accurate conversion requires the large value.

forward(h: Tensor) → Tensor

Convert minimum-phase impulse response to cepstrum.

Parameters:

hTensor [shape=(…, N)]

The truncated minimum-phase impulse response.

Returns:

outTensor [shape=(…, M+1)]

The cepstral coefficients.

Examples

>>> h = diffsptk.ramp(4, 0, -1)
>>> mpir2c = diffsptk.MinimumPhaseImpulseResponseToCepstrum(5, 3)
>>> c = mpir2c(h)
>>> c
tensor([1.3863, 0.7500, 0.2188, 0.0156])

diffsptk.functional.mpir2c(h: Tensor, cep_order: int, n_fft: int = 512) → Tensor

Convert minimum-phase impulse response to cepstrum.

Parameters:

hTensor [shape=(…, N)]

The truncated minimum-phase impulse response.

cep_orderint >= 0

The order of the cepstrum, \(M\).

n_fftint >> N

The number of FFT bins used for conversion. The accurate conversion requires the large value.

Returns:

outTensor [shape=(…, M+1)]

The cepstral coefficients.

See also

c2mpir mgc2mgc