[Eeglablist] Should I use linear DC-detrend after a high pass filter?

[Makoto Miyakoshi]

Dear Mengyan,

One of the problems of a filter is that it causes 'ringing'.
http://en.wikipedia.org/wiki/Ringing_artifacts

If you ask me whether the piecewise detrending can substitute high-pass
filter-I don't know. That seems a good question. Let's ask Tim Mullen.

Makoto


2014-03-22 7:25 GMT-07:00 诸梦妍 <bj12116 at gmail.com>:

> Dear eeglablist,
>
> I‘m confused about the relationship between DC-detrend and high-pass
> filter.
>
> According to
> http://sccn.ucsd.edu/wiki/Chapter_6.5._Preprocessing
> DC-detrend is an alternative to high-pass filter, as they both could
> remove drifts.
>
> Is this mean I needn't use DC-detrend after a 0.1Hz high-pass filter?
>
> My recordings were amplified through BrainAmp DC amplifiers with a
> bandpass filter of 0.016–100 Hz, digitized on-line with a sampling
> frequency of 1000 Hz. Then the data was processed and segmented to -200 to
> 800ms epochs.
>
> Any suggestions are welcome.
> Thank you in advance!
>
> Mengyan Zhu
>
>
>
> --
> Mengyan Zhu
> Psychology department, Peking University
> Dormitory 2061, Building 48,No.5 Yiheyuan Road, Haidian District, Beijing
> 100871, China
>  E-mail: bj12116 at gmail.com
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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