lar2par
Functions
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int main(int argc, char *argv[])
lar2par [ option ] [ infile ]
-m int
order of coefficients \((0 \le M)\)
infile str
double-type LAR coefficients
stdout
double-type PARCOR coefficients
The below example extracts LAR coefficients from
data.dframe < data.d | window | lpc | lpc2par | par2lar > data.lar
- Parameters:
argc – [in] Number of arguments.
argv – [in] Argument vector.
- Returns:
0 on success, 1 on failure.
See also
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class LogAreaRatioToParcorCoefficients
Convert LAR coefficients to PARCOR coefficients.
The input is the \(M\)-th order LAR coefficients:
\[ \begin{array}{cccc} K, & g(1), & \ldots, & g(M), \end{array} \]and the output is the \(M\)-th order PARCOR coefficients:\[ \begin{array}{cccc} K, & k(1), & \ldots, & k(M), \end{array} \]where \(K\) is the gain. The conversion is performed by\[\begin{split}\begin{eqnarray} k(m) &=& \frac{e^{g(m)} - 1}{e^{g(m)} + 1}\\ &=& \tanh(g(m)/2). \end{eqnarray}\end{split}\]Public Functions
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explicit LogAreaRatioToParcorCoefficients(int num_order)
- Parameters:
num_order – [in] Order of coefficients.
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inline int GetNumOrder() const
- Returns:
Order of coefficients.
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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> &log_area_ratio, std::vector<double> *parcor_coefficients) const
- Parameters:
log_area_ratio – [in] \(M\)-th order LAR coefficients.
parcor_coefficients – [out] \(M\)-th order PARCOR coefficients.
- Returns:
True on success, false on failure.
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bool Run(std::vector<double> *input_and_output) const
- Parameters:
input_and_output – [inout] \(M\)-th order coefficients.
- Returns:
True on success, false on failure.
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explicit LogAreaRatioToParcorCoefficients(int num_order)