Spectrum Class Reference

Compute the complex spectrum of input window. More...

#include <Spectrum.h>

Inherits MarSystem.

Public Member Functions
MarSystem *	clone () const
void	myProcess (realvec &in, realvec &out)
	Processes data.
	Spectrum (std::string name)
	Spectrum (const Spectrum &)
	~Spectrum ()

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Detailed Description

Compute the complex spectrum of input window.

Computes the complex spectrum (N/2+1 points) of the input window using the Fast Fourier Transform (FFT). The output is a N-sized column vector (where N is the size of the input audio vector), using the following format:

[Re(0), Re(N/2), Re(1), Im(1), Re(2), Im(2), ..., Re(N/2-1), Im(N/2-1)]

Note that the DC and Nyquist frequencies only have real part, and are output as the two first coefficients in the vector. Overall, the output spectrum has N/2+1 unique points, corresponding to the positive half of the complex spectrum.

Note:

Only the first observation input channel is processed, the rest (if any) is ignored.

See also:

PowerSpectrum, fft

Definition at line 50 of file Spectrum.h.

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Constructor & Destructor Documentation

Spectrum

(

std::string

name

)

Definition at line 34 of file Spectrum.cpp.

Spectrum

(

const Spectrum &

a

)

Definition at line 51 of file Spectrum.cpp.

~Spectrum

(

)

Definition at line 47 of file Spectrum.cpp.

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Member Function Documentation

MarSystem * clone

(

)

const [virtual]

Implements MarSystem.

Definition at line 75 of file Spectrum.cpp.

void myProcess	(	realvec &	in,
		realvec &	out
	)		[virtual]

Processes data.

Parameters:

in	Input data to read.
out	Output data to write.

Implement this method in subclass to define specific data processing.

Implements MarSystem.

Definition at line 150 of file Spectrum.cpp.

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The documentation for this class was generated from the following files:

• /usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Spectrum.h
• /usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Spectrum.cpp