[Eeglablist] EEG AC and DC record problem

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Tue Jul 7 15:15:27 PDT 2015

Dear Booer,

If data are recorded in what you call 'AC mode', you can't recover 'DC
mode' data. It's like this:

DC mode data = AC mode data + infraslow signal + DC difference

I believe when you record data with 'AC mode' the recorder should use
high-pass filter that removes infraslow signal and DC.


On Mon, Jul 6, 2015 at 4:18 AM, bjj2909102003 <bjj2909102003 at 163.com> wrote:

> Hi, everyone.
> Recently, I recorded my EEG data in AC mode. And I made the model based on
> AC mode data (range centred around zero). Now I want to analyze on-line
> EEG data by my previous model. But the online data is acquired in DC mode
> (value is big and not centred around zero) by access SDK. I don't know
> how to convert DC mode data into AC mode data so that I can apply the
> previous model into the data?
> Thank you.
> Booer
> ------------------------------
> bjj2909102003
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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