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PostPosted: Sat Jan 16, 2016 3:41 pm 
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Joined: Tue Mar 17, 2015 4:19 pm
Posts: 8
Hello, What are the methods used to obtain the Butterworth and Chebyshev filters of temporal filter box?

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PostPosted: Tue Jan 19, 2016 3:38 pm 
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Joined: Fri Nov 14, 2014 1:06 pm
Posts: 40
Hello
The computation of the coefficients of these filters is implemented in openvibe/contrib/plugins/processing/signal-processing/src/algorithms/ovpCComputeTemporalFilterCoefficients.cpp
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PostPosted: Wed Mar 01, 2017 3:09 pm 
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Joined: Sat Feb 18, 2017 8:25 pm
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Hi,

are there any explanations for those functions/methods used in the temporal filter calculation?


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PostPosted: Thu Mar 02, 2017 8:51 am 
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Joined: Tue Dec 04, 2012 3:53 pm
Posts: 601
Location: INRIA Rennes, FRANCE
Hi,

the temporal filter box and the coefficient computations are components contributed by Guillaume Gibert at INSERM/U821 very very long time ago (before my time, at least 5+ years). There are some comments in the code and I presume that with some signal processing knowledge related to filter construction it would be relatively easily to spot the used approaches. Unfortunately however we don't have more documentation about it than the small box documentation and the code itself. If you can catch the original author he might remember the materials he used.

For convenience, here are the links to the implementation,

https://scm.gforge.inria.fr/anonscm/git ... 47;hb=HEAD
https://scm.gforge.inria.fr/anonscm/git ... 1e;hb=HEAD
https://scm.gforge.inria.fr/anonscm/git ... af;hb=HEAD
https://scm.gforge.inria.fr/anonscm/git ... 91;hb=HEAD

If you find out any answers, we'd appericiate sharing with the forum!


Best,
Jussi


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