IT++ Logo Newcom Logo

LPC-related Functions


Functions

vec itpp::chirp (const vec &a, double factor)
 Returns a chirped version of the input vector.
double itpp::sd (const vec &In1, const vec &In2)
 Spectral distortion between two vectors, in dB.
double itpp::sd (const vec &In1, const vec &In2, double highestfreq)
 Spectral distortion between two vectors, in dB, up to highest frequency highestfreq.
vec itpp::lerouxguegenrc (const vec &R, int order)
 Computes reflection coefficients from autocorrelation, using the Le-Roux-Guegen algorithm.
vec itpp::levinson (const vec &R2, int order)
 Levinson - Levinson-Durbin recursion.
vec itpp::autocorr (const vec &x, int order)
 Computes the autocorrelation function.
vec itpp::lpc (const vec &x, int order)
 lpc - Linear Predictive Coefficients using autocorrelation method.
vec itpp::schurrc (const vec &R, int order)
 schurrc - Schur algorithm.
vec itpp::ac2rc (const vec &ac)
 ac2rc - Autocorrelation sequence to reflection coefficients conversion.
vec itpp::ac2poly (const vec &ac)
 ac2poly - Autocorrelation sequence to prediction polynomial conversion.
vec itpp::is2rc (const vec &is)
 is2rc - Inverse sine parameters to reflection coefficients conversion.
vec itpp::lar2rc (const vec &lar)
 lar2rc - Log area ratios to reflection coefficients conversion.
vec itpp::lsf2poly (const vec &lsf)
 lsf2poly - Line spectral frequencies to prediction polynomial conversion.
vec itpp::poly2ac (const vec &poly)
 poly2ac - Prediction polynomial to autocorrelation sequence conversion.
vec itpp::poly2lsf (const vec &poly)
 poly2lsf - Prediction polynomial to line spectral frequencies conversion.
vec itpp::poly2rc (const vec &poly)
 poly2rc - Prediction polynomial to reflection coefficients conversion.
vec itpp::poly2cepstrum (const vec &a)
 poly2cepstrum - Prediction polynomial to cepstrum conversion.
vec itpp::poly2cepstrum (const vec &a, int num)
 poly2cepstrum - Prediction polynomial to cepstrum conversion, to the specified order.
vec itpp::cepstrum2poly (const vec &c)
 cepstrum2poly - Cepstrum to prediction polynomial conversion.
vec itpp::rc2ac (const vec &rc)
 rc2ac - Reflection coefficients to autocorrelation sequence conversion.
vec itpp::rc2is (const vec &rc)
 rc2is - Reflection coefficients to inverse sine parameters conversion.
vec itpp::rc2lar (const vec &rc)
 rc2lar - Reflection coefficients to log area ratios conversion.
vec itpp::rc2poly (const vec &rc)
 rc2poly - Reflection coefficients to prediction polynomial conversion.

Function Documentation

vec itpp::chirp const vec a,
double  factor
 

Returns a chirped version of the input vector.

Definition at line 445 of file lpcfunc.cpp.

References it_error_if.

double itpp::sd const vec In1,
const vec In2
 

Spectral distortion between two vectors, in dB.

Definition at line 531 of file lpcfunc.cpp.

References itpp::energy(), itpp::poly2cepstrum(), and itpp::sqrt().

double itpp::sd const vec In1,
const vec In2,
double  highestfreq
 

Spectral distortion between two vectors, in dB, up to highest frequency highestfreq.

Definition at line 537 of file lpcfunc.cpp.

References itpp::abs(), itpp::filter_spectrum(), itpp::log10(), itpp::round(), and itpp::sqr().

vec itpp::lerouxguegenrc const vec R,
int  order
 

Computes reflection coefficients from autocorrelation, using the Le-Roux-Guegen algorithm.

Definition at line 503 of file lpcfunc.cpp.

vec itpp::levinson const vec R2,
int  order
 

Levinson - Levinson-Durbin recursion.

Definition at line 74 of file lpcfunc.cpp.

References itpp::any().

Referenced by itpp::lpc().

vec itpp::autocorr const vec x,
int  order
 

Computes the autocorrelation function.

Definition at line 56 of file lpcfunc.cpp.

References itpp::sum().

Referenced by itpp::lpc().

vec itpp::lpc const vec x,
int  order
 

lpc - Linear Predictive Coefficients using autocorrelation method.

Definition at line 123 of file lpcfunc.cpp.

References itpp::autocorr(), and itpp::levinson().

vec itpp::schurrc const vec R,
int  order
 

schurrc - Schur algorithm.

Definition at line 460 of file lpcfunc.cpp.

vec itpp::ac2rc const vec ac  ) 
 

ac2rc - Autocorrelation sequence to reflection coefficients conversion.

vec itpp::ac2poly const vec ac  ) 
 

ac2poly - Autocorrelation sequence to prediction polynomial conversion.

vec itpp::is2rc const vec is  ) 
 

is2rc - Inverse sine parameters to reflection coefficients conversion.

vec itpp::lar2rc const vec LAR  ) 
 

lar2rc - Log area ratios to reflection coefficients conversion.

Definition at line 208 of file lpcfunc.cpp.

References itpp::exp().

vec itpp::lsf2poly const vec f  ) 
 

lsf2poly - Line spectral frequencies to prediction polynomial conversion.

Definition at line 362 of file lpcfunc.cpp.

References it_error_if.

vec itpp::poly2ac const vec poly  ) 
 

poly2ac - Prediction polynomial to autocorrelation sequence conversion.

Definition at line 128 of file lpcfunc.cpp.

References itpp::any(), it_error_if, itpp::Vec< Num_T >::length(), and itpp::poly2rc().

vec itpp::poly2lsf const vec pc  ) 
 

poly2lsf - Prediction polynomial to line spectral frequencies conversion.

Definition at line 245 of file lpcfunc.cpp.

References itpp::pi.

vec itpp::poly2rc const vec a  ) 
 

poly2rc - Prediction polynomial to reflection coefficients conversion.

Definition at line 159 of file lpcfunc.cpp.

References itpp::any().

Referenced by itpp::poly2ac().

vec itpp::poly2cepstrum const vec a  ) 
 

poly2cepstrum - Prediction polynomial to cepstrum conversion.

Definition at line 397 of file lpcfunc.cpp.

Referenced by itpp::sd().

vec itpp::poly2cepstrum const vec a,
int  num
 

poly2cepstrum - Prediction polynomial to cepstrum conversion, to the specified order.

Definition at line 410 of file lpcfunc.cpp.

References it_error_if.

vec itpp::cepstrum2poly const vec c  ) 
 

cepstrum2poly - Cepstrum to prediction polynomial conversion.

Definition at line 431 of file lpcfunc.cpp.

vec itpp::rc2ac const vec rc  ) 
 

rc2ac - Reflection coefficients to autocorrelation sequence conversion.

vec itpp::rc2is const vec rc  ) 
 

rc2is - Reflection coefficients to inverse sine parameters conversion.

vec itpp::rc2lar const vec k  ) 
 

rc2lar - Reflection coefficients to log area ratios conversion.

Definition at line 197 of file lpcfunc.cpp.

References itpp::log().

vec itpp::rc2poly const vec k  ) 
 

rc2poly - Reflection coefficients to prediction polynomial conversion.

Definition at line 180 of file lpcfunc.cpp.

References itpp::any().

SourceForge Logo

Generated on Thu Apr 19 14:19:59 2007 for IT++ by Doxygen 1.4.6