jass.generators
Class KellyLochbaumFilter

java.lang.Object
  jass.generators.KellyLochbaumFilter

All Implemented Interfaces:

Filter

Direct Known Subclasses:

TubeFilter

public class KellyLochbaumFilter
extends java.lang.Object
implements Filter

Kelly-Lochbaum filter. Follow sample code from http://people.ee.ethz.ch/~jniederh/VocSynth/

Author:

Kees van den Doel (kvdoel@cs.ubc.ca)

Field Summary

protected double[]	cylRadius Radii of the segments
protected double	dampingCoeff How much damping in system (1 == no damping)
protected double[]	gi State of filter.
protected double[]	go State of filter.
protected double[]	kCoeff Filter coefficients derived form cylinder radii
protected double[]	li State of filter.
protected double[]	lo State of filter.
protected int	nTubeSections This many cylinder segments
protected float	srate Sampling rate in Hertz.

Constructor Summary

KellyLochbaumFilter()

KellyLochbaumFilter(float srate, int nTubeSections)
Create and initialize.

Method Summary

protected void	computeKCoeff() Compute low level filter values from geometry
void	filter(float[] output, float[] input, int nsamples, int inputOffset) Proces input (may be same as output).
void	resetFilter() Clear filter of past history
void	setAllCylinderRadii(double[] r) Set all radii
void	setCylinderRadius(int k, double r) Set an individual segment radius
void	setDampingCoeff(double val) Set damping coeff.
void	setGlottalReflectionCoeff(double val) Set the glottal reflection coeff.

Methods inherited from class java.lang.Object

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

Field Detail

dampingCoeff

protected double dampingCoeff

How much damping in system (1 == no damping)

srate

protected float srate

Sampling rate in Hertz.

li

protected double[] li

State of filter.

lo

protected double[] lo

State of filter.

gi

protected double[] gi

State of filter.

go

protected double[] go

State of filter.

nTubeSections

protected int nTubeSections

This many cylinder segments

cylRadius

protected double[] cylRadius

Radii of the segments

kCoeff

protected double[] kCoeff

Filter coefficients derived form cylinder radii

Constructor Detail

KellyLochbaumFilter

public KellyLochbaumFilter(float srate,
                           int nTubeSections)

Create and initialize.

Parameters:

srate - sampling rate in Hertz.

nTubeSection - number of sections

KellyLochbaumFilter

public KellyLochbaumFilter()

Method Detail

computeKCoeff

protected void computeKCoeff()

Compute low level filter values from geometry

setCylinderRadius

public void setCylinderRadius(int k,
                              double r)

Set an individual segment radius

Parameters:

k - index of segment (0,...)

r - radius to set

setAllCylinderRadii

public void setAllCylinderRadii(double[] r)

Set all radii

Parameters:

array - of r radii

setDampingCoeff

public void setDampingCoeff(double val)

Set damping coeff. (1 == no damping)

Parameters:

val - damping coefficient

resetFilter

public void resetFilter()

Clear filter of past history

setGlottalReflectionCoeff

public void setGlottalReflectionCoeff(double val)

Set the glottal reflection coeff.

Parameters:

val - glottal reflection coefficient

filter

public void filter(float[] output,
                   float[] input,
                   int nsamples,
                   int inputOffset)

Proces input (may be same as output). Implements Filter interface

Specified by:

filter in interface Filter

Parameters:

output - user provided buffer for returned result.

input - user provided input buffer.

nsamples - number of samples written to output buffer.

inputOffset - where to start in circular buffer input.