imglsadf
Functions
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int main(int argc, char *argv[])
imglsadf [ option ] mgcfile [ infile ]
-m int
order of coefficients \((0 \le M)\)
-a double
all-pass constant \((|\alpha| < 1)\)
-c int
gamma \(\gamma = -1 / C\) \((0 \le C)\)
-p int
frame period \((1 \le P)\)
-i int
interpolation period \((0 \le I \le P/2)\)
-P int
order of Pade approximation \((4 \le L \le 7)\)
-t bool
transpose filter
-k bool
filtering without gain
mgcfile str
double-type mel-generalized cepstral coefficients
infile str
double-type input sequence
stdout
double-type output sequence
- Parameters
argc – [in] Number of arguments.
argv – [in] Argument vector.
- Returns
0 on success, 1 on failure.
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class sptk::InverseMglsaDigitalFilter
Apply inverse MLSA filter to speech signals.
Public Functions
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InverseMglsaDigitalFilter(int num_filter_order, int num_pade_order, int num_stage, double alpha, bool transposition)
- Parameters
num_filter_order – [in] Order of filter coefficients, \(M\).
num_pade_order – [in] Order of Pade approximation, \(L\).
num_stage – [in] Number of stages, \(C\). If zero, MLSA filter is used.
alpha – [in] All-pass constant, \(\alpha\).
transposition – [in] If true, use transposed form filter.
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inline int GetNumFilterOrder() const
- Returns
Order of coefficients.
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inline int GetNumPadeOrder() const
- Returns
Order of Pade approximation.
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inline int GetNumStage() const
- Returns
Number of stages.
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inline double GetAlpha() const
- Returns
All-pass constant.
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inline bool GetTranspositionFlag() const
- Returns
True if transposed form is used.
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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> &filter_coefficients, double filter_input, double *filter_output, InverseMglsaDigitalFilter::Buffer *buffer) const
- Parameters
filter_coefficients – [in] \(M\)-th order MGLSA filter coefficients.
filter_input – [in] Input signal.
filter_output – [out] Output signal.
buffer – [inout] Buffer.
- Returns
True on success, false on failure.
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bool Run(const std::vector<double> &filter_coefficients, double *input_and_output, InverseMglsaDigitalFilter::Buffer *buffer) const
- Parameters
filter_coefficients – [in] \(M\)-th order MGLSA filter coefficients.
input_and_output – [inout] Input/output signal.
buffer – [inout] Buffer.
- Returns
True on success, false on failure.
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class Buffer
Buffer for InverseMglsaDigitalFilter class.
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InverseMglsaDigitalFilter(int num_filter_order, int num_pade_order, int num_stage, double alpha, bool transposition)