what is the difference?

Forum for software developers to discuss BCI2000 software development
Locked
Aswnvenu
Posts: 5
Joined: 18 Oct 2013, 07:52

what is the difference?

Post by Aswnvenu » 01 Jan 2014, 01:44

sir,

what is the difference between ARsignal processing and spectral signal processing modules in bci2000. In my basic inspection both of the
filtering tools are seems to be same. Can any one tell me the difference between these?

thank you

Aswin

boulay
Posts: 382
Joined: 25 Dec 2011, 21:14

Re: what is the difference?

Post by boulay » 04 Jan 2014, 09:46

From the filter pipe definition for AR:

Code: Select all

#include "SpatialFilter.h"
#include "ARFilter.h"
#include "LinearClassifier.h"
#include "LPFilter.h"
#include "ExpressionFilter.h"
#include "Normalizer.h"

Filter( SpatialFilter, 2.B );
Filter( ARFilter, 2.C );
Filter( LinearClassifier, 2.D );
Filter( LPFilter, 2.D1 );
Filter( ExpressionFilter, 2.D2 );
Filter( Normalizer, 2.E );
From pipe definition for Spectral:

Code: Select all

#include "SpatialFilter.h"
#include "SpectralEstimator.h"
#include "LinearClassifier.h"
#include "LPFilter.h"
#include "ExpressionFilter.h"
#include "Normalizer.h"

Filter( SpatialFilter, 2.B );
Filter( SpectralEstimator, 2.C );
Filter( LinearClassifier, 2.D );
Filter( LPFilter, 2.D1 );
Filter( ExpressionFilter, 2.D2 );
Filter( Normalizer, 2.E );
So as you can see, the only difference is one includes ARFilter.h and the other includes SpectralEstimator.h

If you look at SpectralEstimator.h, then you'll see that all it does is let you choose from 3 filters, including IdentityFilter, ARSpectrum, and FFTSpectrum.

In other words, the SpectralSignalProcessing module includes ARSignalProcessing entirely with the addition of the option to use FFT instead of AR for spectral estimation. There is no reason for you to use ARSignalProcessing. It is included only for backwards compatibility. SpectralSignalProcessing supersedes it in every way.

Locked

Who is online

Users browsing this forum: No registered users and 1 guest