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Class: Fast Fourier Transform

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  Classes of Michele Andreoli  >  Fast Fourier Transform  >  Download .tar.gz .zip  >  Support forum Support forum  >  Blog Blog  >  RSS 1.0 feed RSS 2.0 feed Latest changes  
Name: Fast Fourier Transform
Support forum Support forum
Base name: fft
Description: Compute the Fast Fourier Transform of sampled data
Related classes: , , , , , ,
Version: 0.1
PHP version: 5
License: GNU General Public License (GPL)
All time users: 519 users
All time rank: 4421
Week users: 4 users
Week rank: 930
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Author: Michele Andreoli is available for providing paid consulting. Contact Michele Andreoli .
Packages: 6 Browse this author's classes Browse this author's classes
Country: Italy Italy - PHP jobs in Italy
Age: 26
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Innovation award
Innovation award
Nominee: 3x


  Detailed description  
This class can be used to compute the Fast Fourier Transform (FFT) of sampled data, as well the inverse Fast Fourier transform.

It takes an array of sample data values and calculates the respective Fast Fourier Transform. The result is returned as an array of complex values.

The class can also do the opposite, i.e. compute the inverse Fast Fourier transform .

 

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  Innovation Award  
PHP Programming Innovation award nominee
May 2010
Number 5
 Fast Fourier transform is an algorithm that can be used to compute the spectrum of frequencies of a sound sample or any other type of sampled signal.

This class can be used to compute the Fast Fourier transform of a given sample, as well the inverse operation, rebuild the original signal from its frequency spectrum.

Manuel Lemos

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  Packages that need this class  
Class Dependency Why it is needed
Probability distribution
Required
 To perform the Fast Fourier Transform and applying the filters at the signal

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Plain text file Complex.class.php Class Complex class
Plain text file FFT.class.php Class FFT class
Plain text file index.php Example Index
HTML file output.html Output Output

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