at.tuwien.ifs.feature.extraction.audio.spectrum
Class Spectrogram

java.lang.Object
  at.tuwien.ifs.feature.extraction.audio.spectrum.Spectrogram

public class Spectrogram
extends java.lang.Object

Copyright Vienna University of Technology

Version:

$Id: Spectrogram.java 163 2010-06-16 17:01:53Z mayer $

Author:

Thomas Lidy

Constructor Summary

Spectrogram()

Method Summary

static double[][]

computeSpectrogram(double[] wavedata, int fft_window_length, int fft_window_inc, java.lang.String window_type)

Methods inherited from class java.lang.Object

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

Constructor Detail

Spectrogram

public Spectrogram()

Method Detail

computeSpectrogram

public static double[][] computeSpectrogram(double[] wavedata,
                                            int fft_window_length,
                                            int fft_window_inc,
                                            java.lang.String window_type)

Parameters:

wavedata - audio signal provided as double array

fft_window_length - size of fft window for spectrogram calculation

fft_window_inc - increment for fft window (e.g. fft_window_length/2 means 50 % overlap)

window_type - type of applied window: a constant from Window class

Returns:

double matrix containing the spectrogram