org.tritonus.lowlevel.dsp
Class FilterDesign

java.lang.Object
  org.tritonus.lowlevel.dsp.FilterDesign

public class FilterDesign
extends java.lang.Object

Several methods to design digital filters. This is a design method for FIR filters.

Field Summary

static int	WINDOW_HAMMING
static int	WINDOW_RECTANGULAR
static int	WINDOW_UNKNOWN

Constructor Summary

FilterDesign()

Method Summary

static double[]	designFrequencySampling(double[] adFrequencyResponse) Filter design by frequency sampling.
static double[]	designRectangularBandPass(int nOrder, double dCornerOmega1, double dCornerOmega2) nOrder should be odd.
static double[]	designRectangularBandStop(int nOrder, double dCornerOmega1, double dCornerOmega2) nOrder should be odd.
static double[]	designRectangularHighPass(int nOrder, double dCornerOmega) nOrder should be odd.
static double[]	designRectangularLowPass(int nOrder, double dCornerOmega) nOrder should be odd.
static double[]	designWindowBandPass(int nOrder, double dCornerOmega1, double dCornerOmega2, int nWindow)
static double[]	designWindowBandPass(int nOrder, double dCornerOmega1, double dCornerOmega2, Window window)
static double[]	designWindowBandStop(int nOrder, double dCornerOmega1, double dCornerOmega2, int nWindow)
static double[]	designWindowBandStop(int nOrder, double dCornerOmega1, double dCornerOmega2, Window window)
static double[]	designWindowHighPass(int nOrder, double dCornerOmega, int nWindow)
static double[]	designWindowHighPass(int nOrder, double dCornerOmega, Window window)
static double[]	designWindowLowPass(int nOrder, double dCornerOmega, int nWindow)
static double[]	designWindowLowPass(int nOrder, double dCornerOmega, Window window)

Methods inherited from class java.lang.Object

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

Field Detail

WINDOW_UNKNOWN

public static final int WINDOW_UNKNOWN

See Also:

Constant Field Values

WINDOW_RECTANGULAR

public static final int WINDOW_RECTANGULAR

See Also:

Constant Field Values

WINDOW_HAMMING

public static final int WINDOW_HAMMING

See Also:

Constant Field Values

Constructor Detail

FilterDesign

public FilterDesign()

Method Detail

designFrequencySampling

public static double[] designFrequencySampling(double[] adFrequencyResponse)

Filter design by frequency sampling. This is a design method for FIR filters. It allows to design filters with arbitrary frequency response.

designRectangularLowPass

public static double[] designRectangularLowPass(int nOrder,
                                                double dCornerOmega)

nOrder should be odd.

designRectangularHighPass

public static double[] designRectangularHighPass(int nOrder,
                                                 double dCornerOmega)

nOrder should be odd.

designRectangularBandPass

public static double[] designRectangularBandPass(int nOrder,
                                                 double dCornerOmega1,
                                                 double dCornerOmega2)

nOrder should be odd. o1 < o2 required

designRectangularBandStop

public static double[] designRectangularBandStop(int nOrder,
                                                 double dCornerOmega1,
                                                 double dCornerOmega2)

nOrder should be odd.

designWindowLowPass

public static double[] designWindowLowPass(int nOrder,
                                           double dCornerOmega,
                                           int nWindow)

designWindowHighPass

public static double[] designWindowHighPass(int nOrder,
                                            double dCornerOmega,
                                            int nWindow)

designWindowBandPass

public static double[] designWindowBandPass(int nOrder,
                                            double dCornerOmega1,
                                            double dCornerOmega2,
                                            int nWindow)

designWindowBandStop

public static double[] designWindowBandStop(int nOrder,
                                            double dCornerOmega1,
                                            double dCornerOmega2,
                                            int nWindow)

designWindowLowPass

public static double[] designWindowLowPass(int nOrder,
                                           double dCornerOmega,
                                           Window window)

designWindowHighPass

public static double[] designWindowHighPass(int nOrder,
                                            double dCornerOmega,
                                            Window window)

designWindowBandPass

public static double[] designWindowBandPass(int nOrder,
                                            double dCornerOmega1,
                                            double dCornerOmega2,
                                            Window window)

designWindowBandStop

public static double[] designWindowBandStop(int nOrder,
                                            double dCornerOmega1,
                                            double dCornerOmega2,
                                            Window window)