edu.gtts.sautrela.sp
Class Preemphasis

java.lang.Object
  edu.gtts.sautrela.engine.AbstractDataProcessor
      edu.gtts.sautrela.sp.Preemphasis

All Implemented Interfaces:

DataProcessor, java.beans.BeanInfo, java.io.Serializable

public class Preemphasis
extends AbstractDataProcessor

Implements a high-pass filter that compensates for attenuation in the audio data.

The used formulae, Y[i] = X[i] - (X[i-1] * factor) , is equivalent to the transfer function p(z) = 1 - factor * Z^(-1) and the frecuency response 1 - factor * exp(-jTw) .

See Also:

Serialized Form

Field Summary

static double

DEFAULT_FACTOR default preemphasis factor == 0.97

Fields inherited from interface java.beans.BeanInfo

ICON_COLOR_16x16, ICON_COLOR_32x32, ICON_MONO_16x16, ICON_MONO_32x32

Constructor Summary

Preemphasis()
Creates a new Preemphasis DataProcessor using the default factor

Method Summary

void	editBeanInfo(java.beans.BeanInfo info)
double	getFactor() Gets the pre-emphasis factor
static void	main(java.lang.String[] args)
void	process(Buffer in, Buffer out) Applies pre-emphasis filter to the given Data.
void	setFactor(double factor) Sets the pre-emphasis factor

Methods inherited from class edu.gtts.sautrela.engine.AbstractDataProcessor

getAdditionalBeanInfo, getBeanDescriptor, getDefaultEventIndex, getDefaultPropertyIndex, getEventSetDescriptors, getIcon, getMethodDescriptors, getName, getPropertyDescriptors, toString

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_FACTOR

public static final double DEFAULT_FACTOR

default preemphasis factor == 0.97

See Also:

Constant Field Values

Constructor Detail

Preemphasis

public Preemphasis()

Creates a new Preemphasis DataProcessor using the default factor

Method Detail

getFactor

public double getFactor()

Gets the pre-emphasis factor

Returns:

The pre-emphasis factor

setFactor

public void setFactor(double factor)

Sets the pre-emphasis factor

Parameters:

factor - pre-emphasis factor

process

public void process(Buffer in,
                    Buffer out)
             throws DataProcessorException

Applies pre-emphasis filter to the given Data. First value of a Data Stream is not affected. Both IntData and DoubleData are supported.

Parameters:

in - Input Buffer

out - Output Buffer

Throws:

DataProcessorException

editBeanInfo

public void editBeanInfo(java.beans.BeanInfo info)

Overrides:

editBeanInfo in class AbstractDataProcessor

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception