marytts.signalproc.analysis

Class CepstrumSpeechAnalyser

java.lang.Object

marytts.signalproc.analysis.CepstrumSpeechAnalyser

public class CepstrumSpeechAnalyser
extends Object

Author:

Marc Schröder, oytun.turk Computes real and complex cepstrum directly from speech spectrum Note that this is different than LP cepstrum which is implemented in CepstrumLPCAnalyser

Constructor Summary

Constructors

Constructor and Description
CepstrumSpeechAnalyser()

Method Summary

Methods

Modifier and Type	Method and Description
static double[]	cepstralSmoothedSpectrumInNeper(double[] x, int fs)
static double[]	cepstralSmoothedSpectrumInNeper(double[] x, int fftSize, int lifterOrder)
static ComplexArray	complexCepstrum(double[] frame, int fftSize)
static double[]	filterLowPass(double[] realCepstrum, int cutoffIndex)
static ComplexArray	minimumPhaseResponse(double[] systemAmpsInNeper)
static double[]	minimumPhaseResponseInRadians(double[] systemAmpsInNeper)
static double[]	realCepstrum(double[] frame)
static double[]	realCepstrum(double[] frame, int fftSize)
static double[]	systemPhaseResponse(double[] x, int fs)
static double[]	systemPhaseResponse(double[] x, int fftSize, int lifterOrder)

Methods inherited from class java.lang.Object

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

Constructor Detail

CepstrumSpeechAnalyser

public CepstrumSpeechAnalyser()

Method Detail

realCepstrum

public static double[] realCepstrum(double[] frame)

realCepstrum

public static double[] realCepstrum(double[] frame,
                    int fftSize)

complexCepstrum

public static ComplexArray complexCepstrum(double[] frame,
                           int fftSize)

filterLowPass

public static double[] filterLowPass(double[] realCepstrum,
                     int cutoffIndex)

systemPhaseResponse

public static double[] systemPhaseResponse(double[] x,
                           int fftSize,
                           int lifterOrder)

systemPhaseResponse

public static double[] systemPhaseResponse(double[] x,
                           int fs)

minimumPhaseResponseInRadians

public static double[] minimumPhaseResponseInRadians(double[] systemAmpsInNeper)

minimumPhaseResponse

public static ComplexArray minimumPhaseResponse(double[] systemAmpsInNeper)

cepstralSmoothedSpectrumInNeper

public static double[] cepstralSmoothedSpectrumInNeper(double[] x,
                                       int fs)

cepstralSmoothedSpectrumInNeper

public static double[] cepstralSmoothedSpectrumInNeper(double[] x,
                                       int fftSize,
                                       int lifterOrder)