Spectrum Class Reference
[Analysis]

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

#include <Spectrum.h>

Inherits Marsyas::MarSystem.

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

• /home/marsyas/marsyas/src/marsyas/Spectrum.h
• /home/marsyas/marsyas/src/marsyas/Spectrum.cpp