marytts.signalproc.analysis

Class LpcAnalyser.LpCoeffs

java.lang.Object

marytts.signalproc.analysis.LpcAnalyser.LpCoeffs

Enclosing class:

LpcAnalyser

public static class LpcAnalyser.LpCoeffs
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected double	gain
protected double[]	lpcc
protected double[]	lprefc
protected double[]	lsf
protected double[]	oneMinusA

Constructor Summary

Constructors

Constructor and Description
LpcAnalyser.LpCoeffs(double[] oneMinusA, double gain) Create a set of LPC coefficients
LpcAnalyser.LpCoeffs(LpcAnalyser.LpCoeffs existing)

Method Summary

Methods

Modifier and Type	Method and Description
double[]	getA()
double	getA(int i)
double	getGain() Get the gain, i.e.
double[]	getLPCC(int cepstrumOrder) Convert these LPC coefficients into LPC-Cesptrum coefficients.
double[]	getLPRefc() Convert these LPC coefficients into reflection coefficients.
double[]	getLSF() Convert these LPC coefficients into Line spectral frequencies.
double[]	getOneMinusA() Return a clone of the internal representation of the LPC coefficients.
double	getOneMinusA(int i)
int	getOrder()
boolean	isStable() Check for the stability of the LPC filter.
void	setA(double[] a)
void	setA(int i, double value)
void	setGain(double gain)
void	setLPCC(double[] someLpcc, int LPCOrder) Convert some LPC-Cepstrum coefficients into these LPC coefficients.
void	setLPRefc(double[] someLprefc) Convert some reflection coefficients into these LPC coefficients.
void	setLSF(double[] someLsf)
void	setOneMinusA(double[] oneMinusA)
void	setOneMinusA(int i, double value)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

oneMinusA

protected double[] oneMinusA

gain

protected double gain

lsf

protected double[] lsf

lpcc

protected double[] lpcc

lprefc

protected double[] lprefc

Constructor Detail

LpcAnalyser.LpCoeffs

public LpcAnalyser.LpCoeffs(double[] oneMinusA,
                    double gain)

Create a set of LPC coefficients

Parameters:

oneMinusA - the coefficients, a = [1, -a_1, -a_2, ... -a_p], where p = prediction order

gain - the gain factor, i.e. the square root of the total energy or the prediction error.

LpcAnalyser.LpCoeffs

public LpcAnalyser.LpCoeffs(LpcAnalyser.LpCoeffs existing)

Method Detail

getOneMinusA

public double[] getOneMinusA()

Return a clone of the internal representation of the LPC coefficients.

Returns:

clone of oneMinusA

setOneMinusA

public void setOneMinusA(double[] oneMinusA)

getOneMinusA

public final double getOneMinusA(int i)

getA

public double getA(int i)

setOneMinusA

public void setOneMinusA(int i,
                double value)

setA

public void setA(int i,
        double value)

getGain

public double getGain()

Get the gain, i.e. the square root of the total energy of the prediction error.

Returns:

the gain

setGain

public void setGain(double gain)

getOrder

public int getOrder()

getA

public double[] getA()

setA

public void setA(double[] a)

getLSF

public double[] getLSF()

Convert these LPC coefficients into Line spectral frequencies.

Returns:

the LSFs.

setLSF

public void setLSF(double[] someLsf)

getLPCC

public double[] getLPCC(int cepstrumOrder)

Convert these LPC coefficients into LPC-Cesptrum coefficients.

Parameters:

cepstrumOrder - The cepstrum order (i.e., the index of the last cepstrum coefficient).

Returns:

the LPCCs. c[0] is set to log(gain).

setLPCC

public void setLPCC(double[] someLpcc,
           int LPCOrder)

Convert some LPC-Cepstrum coefficients into these LPC coefficients.

Parameters:

someLpcc - some Lpcc

LPCOrder - The LPC order (i.e., the index of the last LPC coefficient). The gain is set to exp(c[0]) and the LPCs are represented in the oneMinusA format [1 -a_1 -a_2 ... -a_p].

getLPRefc

public double[] getLPRefc()

Convert these LPC coefficients into reflection coefficients.

Returns:

the reflection coefficients.

setLPRefc

public void setLPRefc(double[] someLprefc)

Convert some reflection coefficients into these LPC coefficients.

Parameters:

someLprefc - some Lprefc

isStable

public boolean isStable()

Check for the stability of the LPC filter.

Returns:

true if the filter is stable, false otherwise.