Search found 645 matches
- Mon Jan 30, 2012 1:58 pm
- Forum: Tutorial scenarios
- Topic: design a scenario
- Replies: 3
- Views: 12403
Re: design a scenario
Dear mana, the Lua stimulator box can be used to generate appropriate stimulation codes. Lua is a very simple programming language. The box will let you program a stimulation sequence that will be sent to later boxes. The documentation includes HOWTO samples to show you haw to use such box. Once you...
- Mon Jan 30, 2012 1:52 pm
- Forum: Boxes
- Topic: Box behaving differently in different situations
- Replies: 17
- Views: 18598
Re: Box behaving differently in different situations
Dear karthiks,
do you mean when the sampling frequency / sample count per block ratio changes ?
If this is what you mean, you would probably be interested in re-epoching the signal stream with a Time Based Epoching box.
Hope this helps,
Yann
do you mean when the sampling frequency / sample count per block ratio changes ?
If this is what you mean, you would probably be interested in re-epoching the signal stream with a Time Based Epoching box.
Hope this helps,
Yann
- Sun Jan 29, 2012 7:56 pm
- Forum: Acquisition server and drivers
- Topic: Brain Products actiChamp supported ?
- Replies: 4
- Views: 7308
Re: Brain Products actiChamp supported ?
Dear sebihoefle,
as far as I know, the RDA protocol has been specified by BrainProducts themselves. It would be weird that the Pycorder software behaves differently than the BrainVision Recorder (btw, weird does not mean imposible ).
Keep us posted,
Regards,
Yann
as far as I know, the RDA protocol has been specified by BrainProducts themselves. It would be weird that the Pycorder software behaves differently than the BrainVision Recorder (btw, weird does not mean imposible ).
Keep us posted,
Regards,
Yann
- Sun Jan 29, 2012 7:43 pm
- Forum: Boxes
- Topic: Box behaving differently in different situations
- Replies: 17
- Views: 18598
Re: Box behaving differently in different situations
Dear karthiks, as Laurent stated, the EBML Stream Spy box will probably help in sorting this out. This box is designed to dump the stream structure in the console log. Using this, we can easily observe bad chunk dating, abnormal number of chunks per scheduler steps etc. Please put such box in your s...
- Sun Jan 29, 2012 7:36 pm
- Forum: Tutorial scenarios
- Topic: design a scenario
- Replies: 3
- Views: 12403
Re: design a scenario
Dear Mana,
you'd better generate a stimulation sequence with a Lua Stimulator box and connect two Sound Player boxes to this stim generator.
Hope this helps,
Regards,
Yann
you'd better generate a stimulation sequence with a Lua Stimulator box and connect two Sound Player boxes to this stim generator.
Hope this helps,
Regards,
Yann
- Sun Jan 29, 2012 7:34 pm
- Forum: Discussion about BCI and related topics
- Topic: Emotiv Hardware
- Replies: 10
- Views: 31843
Re: Emotiv Hardware
Dear Stefan thank you for your very insightful post. I suspect the problems most people complain about with the emotiv device (qualified as noise ) is actually electrode contact loss. This happens quite usually with my device at locations such as T7/T8 for instance, when swallowing or even moving he...
- Thu Jan 26, 2012 12:51 pm
- Forum: Help for building the software
- Topic: [Arch Linux| Installation
- Replies: 2
- Views: 6535
Re: [Arch Linux| Installation
Chears,
I just wrote a new blog post about how to compile OpenViBE on a new Linux distro.
I hope this helps future contributors !
Regards,
Yann
I just wrote a new blog post about how to compile OpenViBE on a new Linux distro.
I hope this helps future contributors !
Regards,
Yann
- Sun Jan 22, 2012 6:24 pm
- Forum: Discussion about OpenViBE
- Topic: OpenVibe Visual Studio 2010 solution
- Replies: 7
- Views: 8016
Re: OpenVibe Visual Studio 2010 solution
Could you try with latest SVN revision ? I saw a recent commit from Laurent Bonnet that should fix this problem !
Regards,
Yann
Regards,
Yann
- Sat Jan 21, 2012 2:49 pm
- Forum: Discussion about OpenViBE
- Topic: OpenVibe Visual Studio 2010 solution
- Replies: 7
- Views: 8016
Re: OpenVibe Visual Studio 2010 solution
Dear anton,
why don't you use the provided win32-generate-vc-proj.cmd script ?
Regards,
Yann
why don't you use the provided win32-generate-vc-proj.cmd script ?
Regards,
Yann
- Thu Jan 19, 2012 8:23 pm
- Forum: Discussion about OpenViBE
- Topic: 2d and 3d visualisation
- Replies: 4
- Views: 4970
Re: 2d and 3d visualisation
Hello everyone, your are actually referring to bug #34 Forget the 0, the color scale is representing low values with blue color and high values with red color, no matter if 0 is between these two min / max values ; also, the data scale is refreshed for each input value to fit the color scale. You sh...
- Thu Dec 22, 2011 9:41 am
- Forum: Designer
- Topic: Urgent help, please
- Replies: 6
- Views: 9852
Re: Urgent help, please
I also have some questions about the available EEG samples on openvibe (for the P300 speller and the magic card). Can you please provide me with detailed information about them, e.g. which EEG recording system was used to collect the data? How many training sessions were done before the data collec...
- Tue Dec 20, 2011 2:25 pm
- Forum: Scenarios and BCI design
- Topic: P300 speller and LDA accuracy
- Replies: 20
- Views: 25875
Re: P300 speller and LDA accuracy
Hello guys, sorry I'm taking the discussion very late as I got the notification of this evolution in the SVN commit mailing list. I'd like to point out two issues and propose one alternative solution here : Computing TP/FP supposes 2-class classifiers. Even if OpenViBE does not come with multi class...
- Tue Oct 25, 2011 8:31 am
- Forum: Scenarios and BCI design
- Topic: day 1: which headset to start experimenting?
- Replies: 5
- Views: 6684
Re: day 1: which headset to start experimenting?
Dear Dieter, dear Alessiof, OpenEEG is actually up to 6 channels. It is cheap as well but this is a do it yourself device ; you'll need basic skills in electronic montage to set this up, or you can buy pre-built cards from Olimex. Still, there will be no case for the cards and you'll have to build t...
- Mon Oct 10, 2011 7:43 pm
- Forum: Driver development
- Topic: QDS Driver
- Replies: 3
- Views: 9953
Re: QDS Driver
Dear bernat, dear Laurent, OpenViBE actually does not handle a physical unit with acquired data so far. Each driver is free to use whatever matches its needs. The Brain Products Brainamp driver for instance, has a scaling parameter included in its configuration dialog. By the way, you can use the fu...
- Tue Sep 27, 2011 1:58 pm
- Forum: Box and application development
- Topic: stimulation based epoching
- Replies: 8
- Views: 11741
Re: stimulation based epoching
Dear Nicolas, I suspect that you have an "early" stimulation and that l_ui64OffsetSampleCount would be less than zero (being unsigned, that results in so called crazy value :) ). That may be a bug but can you confirm that this is happening in your case (see line 222 of ovpCBoxAlgorithmStimultionBase...