clipgenerator.localisation

Class SpectrogramCorrelator

java.lang.Object

clipgenerator.localisation.SpectrogramCorrelator

public class SpectrogramCorrelator
extends java.lang.Object

Class with some functions for calculating cross correlations between lumps of spectrogram.

Author:

Doug Gillespie

Constructor Summary

Constructors

Constructor and Description
SpectrogramCorrelator()

Method Summary

Methods

Modifier and Type	Method and Description
double[]	getDelay(Complex[][] specData1, Complex[][] specData2) Find the maxima in the cross correlation function from two lumps of spectrogram data.
double[]	getDelay(Complex[][] specData1, Complex[][] specData2, double maxDelay) Find the maxima in the cross correlation function from two lumps of spectrogram data.
double[]	getDelay(Complex[][] specData1, Complex[][] specData2, double maxDelay, int[] analBins) Find the maxima in the cross correlation function from two lumps of spectrogram data.

Methods inherited from class java.lang.Object

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

Constructor Detail

SpectrogramCorrelator

public SpectrogramCorrelator()

Method Detail

getDelay

public double[] getDelay(Complex[][] specData1,
                Complex[][] specData2)

Find the maxima in the cross correlation function from two lumps of spectrogram data. Note that the spectrogram data will only go to half the original FFT length.

Parameters:

specData1 - block of complex spectrogram data

specData2 - second block of complex spectrogram data

Returns:

cross correlation position and value.

getDelay

public double[] getDelay(Complex[][] specData1,
                Complex[][] specData2,
                double maxDelay)

Find the maxima in the cross correlation function from two lumps of spectrogram data. Note that the spectrogram data will only go to half the original FFT length.

Parameters:

specData1 - block of complex spectrogram data

specData2 - second block of complex spectrogram data

max - possible delay maximum possible delay between channels.

Returns:

cross correlation position and value.

getDelay

public double[] getDelay(Complex[][] specData1,
                Complex[][] specData2,
                double maxDelay,
                int[] analBins)

Find the maxima in the cross correlation function from two lumps of spectrogram data. Note that the spectrogram data will only go to half the original FFT length.

Parameters:

specData1 - block of complex spectrogram data

specData2 - second block of complex spectrogram data

analBins - frequency bin range for the analysis

max - possible delay maximum possible delay between channels.

Returns:

cross correlation position and value.