marytts.signalproc.filter

Class RecursiveFilter

java.lang.Object

marytts.signalproc.filter.RecursiveFilter

public class RecursiveFilter
extends Object

Author:

Marc Schröder A purely recursive filter, following the equation: x[n] = e[n] + a[1]*x[n-1] + a[2]*x[n-2] + ... + a[p]*x[n-p]

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RecursiveFilter.Processor

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	a The prediction coefficients, as in * x[n] = e[n] + a[1]*x[n-1] + a[2]*x[n-2] + ...

Constructor Summary

Constructors

Constructor and Description
RecursiveFilter(double[] a) Create a new recursive filter.

Method Summary

Methods

Modifier and Type	Method and Description
double[]	apply(double[] signal) Apply this filter to the given input signal.
DoubleDataSource	apply(DoubleDataSource signal) Apply this filter to the given input signal.

Methods inherited from class java.lang.Object

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

Field Detail

a

protected final double[] a

The prediction coefficients, as in * x[n] = e[n] + a[1]*x[n-1] + a[2]*x[n-2] + ... + a[p]*x[n-p]

Constructor Detail

RecursiveFilter

public RecursiveFilter(double[] a)

Create a new recursive filter.

Parameters:

a - the recursive prediction coefficients

Method Detail

apply

public DoubleDataSource apply(DoubleDataSource signal)

Apply this filter to the given input signal. The input signal is filtered piece by piece, as it is read from the data source returned by this method. This is the recommended way to filter longer signals.

Parameters:

signal - the signal to which this filter should be applied

Returns:

a DoubleDataSource from which the data can be read.

apply

public double[] apply(double[] signal)

Apply this filter to the given input signal. This method filters the entire signal, and returns the entire filtered signal. For long signals, it is better to use apply(DoubleDataSource).

Parameters:

signal - the signal to which this filter should be applied

Returns:

the filtered signal.