mcpf

Functions

int main(int argc, char *argv[])

mcpf [ option ] [ infile ]

• -m int

  • order of mel-cepstral coefficients \((0 \le M < L)\)

• -l int

  • length of impulse response \((M < L)\)

• -s int

  • onset index \((0 \le S \le M)\)

• -a double

  • all-pass constant \((|\alpha| < 1)\)

• -b double

  • intensity \((\beta)\)

• infile str

  • double-type mel-cepstral coefficients

• stdout

  • double-type postfiltered mel-cepstral coefficients

Parameters

• argc – [in] Number of arguments.

• argv – [in] Argument vector.

Returns

0 on success, 1 on failure.

See also

mgcep amgcep

class sptk::MelCepstrumPostfiltering

Emphasize formant in mel-cepstum domain.

The input is the \(M\)-th order mel-cepstral coefficients:

\[ \begin{array}{cccc} \tilde{c}(0), & \tilde{c}(1), & \ldots, & \tilde{c}(M), \end{array} \]

and the output is the \(M\)-th order postfiltered ones:

\[ \begin{array}{cccc} \tilde{c}_\beta(0), & \tilde{c}_\beta(1), & \ldots, & \tilde{c}_\beta(M), \end{array} \]

where \(\beta\) is the intensity of postfiltering. Note if \(\beta=0\), postfiltering is not performed.

[1] T. Yoshimura, K. Tokuda, T. Masuko, and T. Kobayashi, “Incorporating a mixed excitation model and postfilter into HMM-based text-to-speech synthesis,” Systems and Computers in Japan, vol. 36, no. 12, pp. 43-50, 2005.

Public Functions

MelCepstrumPostfiltering(int num_order, int impulse_response_length, int onset_index, double alpha, double beta)

Parameters

• num_order – [in] Order of mel-cepstral coefficients, \(M\).

• impulse_response_length – [in] Length of impulse response, \(L\).

• onset_index – [in] This is typically set to two, i.e., 0th and 1st mel-cepstral coefficients are not emphasized.

• alpha – [in] All-pass constant, \(\alpha\).

• beta – [in] Intensity of postfiltering, \(\beta\).

inline int GetNumOrder() const

Returns

Order of mel-cepstral coefficients.

inline int GetImpulseResponseLength() const

Returns

Impulse response length.

inline int GetOnsetIndex() const

Returns

Onset index.

inline double GetAlpha() const

Returns

Alpha.

inline double GetBeta() const

Returns

Beta.

inline bool IsValid() const

Returns

True if this object is valid.

bool Run(const std::vector<double> &mel_cepstrum, std::vector<double> *postfiltered_mel_cepstrum, MelCepstrumPostfiltering::Buffer *buffer) const

Parameters

• mel_cepstrum – [in] \(M\)-th order mel-cepstral coefficients.

• postfiltered_mel_cepstrum – [out] \(M\)-th order postfiltered ones.

• buffer – [out] Buffer.

Returns

True on success, false on failure.

bool Run(std::vector<double> *input_and_output, MelCepstrumPostfiltering::Buffer *buffer) const

Parameters

• input_and_output – [inout] \(M\)-th order mel-cepstral coefficients.

• buffer – [out] Buffer.

Returns

True on success, false on failure.

class Buffer

Buffer for MelCepstrumPostfiltering class.