org.mobicents.media.server.component.audio

Class GoertzelFilter

java.lang.Object

org.mobicents.media.server.component.audio.GoertzelFilter

public class GoertzelFilter
extends Object

Author:

kulikov

Constructor Summary

Constructors

Constructor and Description
GoertzelFilter() Creates a new instance of the Goertzel Filter.
GoertzelFilter(int f, int N, double len) Creates a new instance of the Goertzel Filter for predefined frequency of the signal.

Method Summary

Methods

Modifier and Type	Method and Description
double	getPower(double[] signal, int offset) Calculates power of the specified frequence of the specified signal.
double	getPower(double f, double[] signal, int offset, int len, double scale) Calculates power of the specified frequence of the specified signal.

Methods inherited from class java.lang.Object

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

Constructor Detail

GoertzelFilter

public GoertzelFilter()

Creates a new instance of the Goertzel Filter.

GoertzelFilter

public GoertzelFilter(int f,
              int N,
              double len)

Creates a new instance of the Goertzel Filter for predefined frequency of the signal.

Parameters:

the - length of this signal is samples.

len - the length of the signal is seconds.

the - frequency of the signal.

Method Detail

getPower

public double getPower(double f,
              double[] signal,
              int offset,
              int len,
              double scale)

Calculates power of the specified frequence of the specified signal.

Parameters:

f - the frequence value.

signal - sampled signal.

offset - index of the first sample of the signal.

len - the length of signal in samples

scale - the length of signal in seconds

Returns:

the power of the specified frequency

getPower

public double getPower(double[] signal,
              int offset)

Calculates power of the specified frequence of the specified signal.

Parameters:

signal - sampled signal.

offset - index of the first sample of the signal.

Returns:

the power of the specified frequency