mcpf
Functions
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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.
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class MelCepstrumPostfilter
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
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MelCepstrumPostfilter(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, \(\beta\).
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inline int GetNumOrder() const
- Returns:
Order of mel-cepstral coefficients.
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inline int GetImpulseResponseLength() const
- Returns:
Impulse response length.
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inline int GetOnsetIndex() const
- Returns:
Onset index.
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inline double GetAlpha() const
- Returns:
Alpha.
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inline double GetBeta() const
- Returns:
Beta.
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inline bool IsValid() const
- Returns:
True if this object is valid.
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bool Run(const std::vector<double> &mel_cepstrum, std::vector<double> *postfiltered_mel_cepstrum, MelCepstrumPostfilter::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.
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bool Run(std::vector<double> *input_and_output, MelCepstrumPostfilter::Buffer *buffer) const
- Parameters:
input_and_output – [inout] \(M\)-th order mel-cepstral coefficients.
buffer – [out] Buffer.
- Returns:
True on success, false on failure.
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class Buffer
Buffer for MelCepstrumPostfilter class.
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MelCepstrumPostfilter(int num_order, int impulse_response_length, int onset_index, double alpha, double beta)