[Eeglablist] How to create a buffer in MATLAB for real time EEG data acquisition?

[Alejandro Ojeda]

Hi Norman,

Perhaps the easiest way to accomplish what you want (with maximum control
of your codebase) is to use a Matlab timer
<https://www.mathworks.com/help/matlab/ref/timer-class.html> and read from
the RDA client frequently, then you can pass the chunk of samples to a
function implementing your pipeline.

Another option is to use BCILAB
<https://sccn.ucsd.edu/wiki/BCILAB#Using_existing_external_interfaces>.

If Simulink is an option, you could have a look at SimBSI
<https://bitbucket.org/neatlabs/simbsi/wiki/Home> (Simulink for Brain
Signal Interfaces). The package is still in beta version so some things may
change down the road, but it is fully functional and actively used at the
moment. SimBSI leverages many existing functions in Simulink for signal
processing and machine learning with flexible data acquisition interfaces
(LSL, TCP/IP, UDP, among others) with online-capable brain imaging
functions. If you need to write your own processing block, check Matlab's
doc's pages
<https://www.mathworks.com/help/simulink/ug/create-your-own-simulink-block.html>
and
you can find also many tutorials on Youtube.

Whatever you do, beware that the processing time needs to be less than the
acquisition time for a chunk of data, otherwise, samples will accumulate
and the pipeline won't be real-time.

I hope this helps, best,
Alejandro

On Wed, Sep 12, 2018 at 9:49 AM Norman Sinnigen <
norman.sinnigen at student.uni-tuebingen.de> wrote:

> Is there a function or software package, suitable for Matlab, (except
> Fieldtrip) enabling to create a buffer for real-time EEG data and perform
> calculations?
>
> The processing pipeline is the following: EEG data is recorded using
> BrainVision Recorder and sent via TCP/IP (RDA client) to Matlab. The
> incoming EEG data’s point size is 63x10. Performing calculation on the
> incoming EEG data takes time, which is why I am looking for a way of
> creating a buffer enabling to perform calculation on a specific window of
> incoming EEG data packages, while further incoming EEG data packages are
> stored in a buffer, waiting to be further used for calculation.
>
>
>
> Fieldtrip offers this service, but converting data from EEG to Fieldtrip
> and back requires too much time. I found MatRiver, but couldn’t find a way
> to download it, since download is not offered and the given email doesn’t
> work.
>
>
>
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-- 
Alejandro Ojeda
Neural Engineering Lead at NEATLabs

Ph.D. candidate in the Electrical & Computer Engineering Department,
University of California San Diego, USA

ResearchGate <https://www.researchgate.net/profile/Alejandro_Ojeda>
GitHub <https://github.com/aojeda>
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