jass.generators
Class KellyLochbaumFilterOld

java.lang.Object
  jass.generators.KellyLochbaumFilterOld

All Implemented Interfaces:

Filter

public class KellyLochbaumFilterOld
extends java.lang.Object
implements Filter

Kelly-Lochbaum filter. Follow notation of MATLAB sample code from www.cs.tut.fi/sgn/arg/8003051 and associated writeup therein

Author:

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

Field Summary

protected double[]	B0 State of filter.
protected double[]	B0old Scratch variables
protected double[]	B1 State of filter.
protected double[]	B1old Scratch variables
protected double[]	cylRadius Radii of the segments
protected double	dampingCoeff How much damping in system (1 == no damping)
protected double[]	F0 State of filter.
protected double[]	F0old Scratch variables
protected double[]	F1 State of filter.
protected double[]	F1old Scratch variables
protected double	glottalReflectionCoeff How much is reflected back at glottis
protected double[]	kCoeff Filter coefficients derived form cylinder radii
protected int	nJunctions This many junctions (above -1)
protected int	nTubeSections This many cylinder segments
protected float	srate Sampling rate in Hertz.

Constructor Summary

KellyLochbaumFilterOld()

KellyLochbaumFilterOld(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

srate

protected float srate

Sampling rate in Hertz.

F0

protected double[] F0

State of filter.

F1

protected double[] F1

State of filter.

B0

protected double[] B0

State of filter.

B1

protected double[] B1

State of filter.

glottalReflectionCoeff

protected double glottalReflectionCoeff

How much is reflected back at glottis

dampingCoeff

protected double dampingCoeff

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

F0old

protected double[] F0old

Scratch variables

F1old

protected double[] F1old

Scratch variables

B0old

protected double[] B0old

Scratch variables

B1old

protected double[] B1old

Scratch variables

nTubeSections

protected int nTubeSections

This many cylinder segments

nJunctions

protected int nJunctions

This many junctions (above -1)

cylRadius

protected double[] cylRadius

Radii of the segments

kCoeff

protected double[] kCoeff

Filter coefficients derived form cylinder radii

Constructor Detail

KellyLochbaumFilterOld

public KellyLochbaumFilterOld(float srate,
                              int nTubeSections)

Create and initialize.

Parameters:

srate - sampling rate in Hertz.

nTubeSection - number of sections

KellyLochbaumFilterOld

public KellyLochbaumFilterOld()

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

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

setDampingCoeff

public void setDampingCoeff(double val)

Set damping coeff. (1 == no damping)

Parameters:

val - damping 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.