mgc2sp
Functions
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int main(int argc, char *argv[])
mgc2sp [ option ] [ infile ]
-m int
order of coefficients \((0 \le M)\)
-a double
all-pass constant \((|\alpha| < 1)\)
-g double
gamma \((|\gamma| \le 1)\)
-c int
gamma \(\gamma = -1 / C\) \((1 \le C)\)
-n bool
regard as normalized mel-generalized cepstrum
-u bool
regard as multiplied by gamma
-l int
FFT length \((2 \le N)\)
-o int
output format
0\(20 \log_{10} |H(z)|\)1\(\log |H(z)|\)2\(|H(z)|\)3\(|H(z)|^2\)4\(\arg|H(z)| / \pi\)5\(\arg|H(z)|\)6\(\arg|H(z)| \times 180/\pi\)
infile str
double-type mel-generalized cepstral coefficients
stdout
double-type spectrum
In the following example, 12-th order mel-generalized cepstral coefficients in
data.mgcepare converted to log magnitude spectrum.mgc2sp -m 12 -a 0.35 -c 2 < data.mgcep > data.spec
- Parameters
argc – [in] Number of arguments.
argv – [in] Argument vector.
- Returns
0 on success, 1 on failure.
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class sptk::MelGeneralizedCepstrumToSpectrum
Convert mel-generalized cepstrum to spectrum.
This is a simple combination of MelGeneralizedCepstrumToMelGeneralizedCepstrum and RealValuedFastFourierTransform.
Public Functions
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MelGeneralizedCepstrumToSpectrum(int num_order, double alpha, double gamma, bool is_normalized, bool is_multiplied, int fft_length)
- Parameters
num_order – [in] Order of coefficients, \(M\).
alpha – [in] All-pass constant, \(\alpha\).
gamma – [in] Exponent parameter, \(\gamma\).
is_normalized – [in] gain-normalized flag.
is_multiplied – [in] gamma-multiplied flag.
fft_length – [in] FFT length, \(N\).
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inline int GetNumOrder() const
- Returns
Order of coefficients.
-
inline double GetAlpha() const
- Returns
Alpha.
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inline double GetGamma() const
- Returns
Gamma.
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inline bool IsNormalized() const
- Returns
True if input is gain-normalized.
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inline bool IsMultiplied() const
- Returns
True if input is multiplied by gamma.
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inline int GetFftLength() const
- Returns
FFT length.
-
inline bool IsValid() const
- Returns
True if this object is valid.
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bool Run(const std::vector<double> &mel_generalized_cepstrum, std::vector<double> *amplitude_spectrum, std::vector<double> *phase_spectrum, MelGeneralizedCepstrumToSpectrum::Buffer *buffer) const
- Parameters
mel_generalized_cepstrum – [in] \(M\)-th order mel-generalized cepstrum.
amplitude_spectrum – [out] \(N\)-length amplitude spectrum.
phase_spectrum – [out] \(N\)-length phase spectrum.
buffer – [out] Buffer.
- Returns
True on success, false on failure.
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class Buffer
Buffer for MelGeneralizedCepstrumToSpectrum class.
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MelGeneralizedCepstrumToSpectrum(int num_order, double alpha, double gamma, bool is_normalized, bool is_multiplied, int fft_length)