edu.gtts.sautrela.sp
Class LiveFeaturelNormalization

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

All Implemented Interfaces:

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

public class LiveFeaturelNormalization
extends AbstractDataProcessor

Real Time Feature Normalization. It is based on an exponential high-pass firter:

H(z) = (1-α) · (1-z^-1) / (1-(1-α)·z^-1)

Equivalently:

y_t = x_t - μ_t
μ_t = (1-α) · μ_t-1 + α · x_t

For a time constant of τ (the value for wich the output is cut in half) and sampling freq F, α = log(2) / (τ·F).

See Also:

Serialized Form

Field Summary

static int

DEFAULT_TIMEFREQCONSTANT default value for τ·F = 500 (F = 100Hz and τ = 5sg)

Fields inherited from interface java.beans.BeanInfo

ICON_COLOR_16x16, ICON_COLOR_32x32, ICON_MONO_16x16, ICON_MONO_32x32

Constructor Summary

LiveFeaturelNormalization()
Creates a new LiveCepstralNormalization

Method Summary

void	editBeanInfo(java.beans.BeanInfo info)
int	getTimeFreqConstant() Getter for property timeFreqConstant.
static void	main(java.lang.String[] args)
void	process(Buffer in, Buffer out) Processes the input Data.
void	setTimeFreqConstant(int timeFreqConstant) Setter for property timeFreqConstant.

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_TIMEFREQCONSTANT

public static final int DEFAULT_TIMEFREQCONSTANT

default value for τ·F = 500 (F = 100Hz and τ = 5sg)

See Also:

Constant Field Values

Constructor Detail

LiveFeaturelNormalization

public LiveFeaturelNormalization()

Creates a new LiveCepstralNormalization

Method Detail

getTimeFreqConstant

public int getTimeFreqConstant()

Getter for property timeFreqConstant.

Returns:

Value of property timeFreqConstant.

setTimeFreqConstant

public void setTimeFreqConstant(int timeFreqConstant)

Setter for property timeFreqConstant.

Parameters:

timeFreqConstant - The number of samples for which the output is cut in half (τ·F).

process

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

Processes the input Data. Input data is treated as multidimensional data and therefore all processed vectors MUST have the same length.

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