<html><div style='background-color:'><DIV class=RTE>Dear all,</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>I am doing my research in the area of Ocular artifact removal in EEG signals. I am currently using the eeg data downloaded from the net. But I have a set of eeg files (.eeg) got from the hospital, which is recorded using Superspec EEG recorder. I have requested the company people to convert that .eeg file to text file. They have converted at a sampling rate of 256 samples/sec. The problems I face in using that data are as follows:</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>1) <STRONG>The sampled data is shown as below:</STRONG></DIV>
<DIV class=RTE><STRONG></STRONG> </DIV>
<DIV class=RTE>Channel3 - (first 1 second)<BR> -518 -520 -518 -518 -516 -518 -520 -518 -518 -522 -518 -514 -518 -516 -520 -514 -518 -518 -516 -518 -512 -514 -512 -514 -514 -518 -512 -514 -516 -514 -514 -512 -520 -522 -516 -516 -518 -518 -518 -516 -518 -518 -518 -516 -518 -518 -516 -518 -514 -520 -516 -518 -514 -516 -514 -514 -516 -512 -514 -514 -518 -512 -514 -514 -520 -518 -516 -516 -520 -516 -518 -518 -518 -516 -516 -518 -518 -518 -514 -520 -516 -518 -516 -516 -516 -514 -516 -514 -516 -512 -514 -514 -516 -514 -514 -518 -518 -516 -518 -516 -520 -518 -518 -520 -518 -516 -514 -520 -516 -516 -516 -516 -518 -516 -516 -516 -516 -512 -518 -516 -516 -514 -514 -514 -512 -516 -514 -518 -518 -516 -516 -520 -518 -520 -518 -522 -518 -516 -516 -520 -516 -514 -520 -516 -516 -516 -518 -518 -514 -514 -516 -514 -514 -516 -514 -514 -512 -516 -514 -514 -518 -520 -516 -518 -516 -520 -520 -520
-516 -516 -518 -516 -518 -516 -520 -516 -514 -516 -518 -516 -514 -516 -514 -514 -512 -516 -514 -512 -514 -516 -516 -510 -516 -520 -518 -518 -514 -518 -520 -516 -520 -516 -520 -514 -516 -518 -516 -516 -514 -516 -516 -516 -514 -518 -514 -514 -514 -516 -516 -512 -514 -516 -516 -512 -518 -518 -520 -516 -516 -518 -520 -516 -522 -518 -516 -516 -516 -520 -514 -518 -514 -516 -516 -514 -514 -516 -514 -514 -518 -514 -516 -512 -514 -516 -514 -514</DIV>
<DIV class=RTE>Channel4 ( (first 1 second)<BR><BR> -510 -456 -492 -454 -472 -458 -456 -456 -438 -480 -430 -498 -444 -480 -464 -482 -468 -448 -482 -458 -476 -438 -490 -448 -462 -456 -456 -476 -466 -480 -438 -476 -500 -478 -472 -482 -452 -478 -444 -470 -432 -474 -444 -484 -468 -462 -490 -460 -486 -432 -486 -450 -470 -452 -472 -474 -444 -480 -436 -488 -454 -474 -446 -460 -476 -506 -446 -494 -436 -472 -446 -462 -458 -452 -476 -456 -490 -450 -496 -456 -472 -452 -464 -468 -454 -482 -444 -484 -432 -470 -442 -468 -476 -460 -482 -440 -454 -502 -438 -478 -454 -460 -470 -438 -484 -438 -478 -446 -484 -466 -482 -480 -450 -480 -446 -480 -442 -482 -438 -472 -454 -454 -472 -448 -494 -446 -482 -440 -470 -488 -470 -460 -484 -448 -476 -424 -476 -448 -462 -470 -460 -498 -458 -494 -434 -478 -452 -472 -468 -464 -466 -448 -484 -446 -482 -442 -482 -456 -456 -468 -496 -472 -490 -456 -480 -456 -462 -450
-456 -478 -438 -486 -436 -496 -456 -484 -448 -462 -478 -452 -484 -446 -474 -436 -476 -454 -466 -464 -462 -482 -434 -482 -486 -468 -476 -472 -460 -482 -444 -468 -434 -482 -432 -474 -458 -478 -490 -462 -474 -440 -486 -440 -464 -456 -456 -462 -450 -472 -440 -486 -446 -478 -434 -470 -468 -490 -454 -482 -442 -476 -438 -456 -448 -454 -474 -454 -488 -460 -502 -448 -470 -446 -476 -460 -448 -486 -442 -478 -436 -472 -438 -484 -462 -458 -462 -452</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>If I plot this using plot command in Matlab or eegplot command using EEGLAB toolbox, the waveform I am getting doesn't look like eeg signal.</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE> Is the sampling rate correct ? To what accuracy (how many decimal places) the data need to be converted. As shown above the digital data is in integer format. Is it correct ? Is this the problem. </DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>If we have the data in analog format, how to convert to digital format, so that it can be used by the EEGLAB toolbox. (Because this toolbox is very useful for my work)</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>If anyone can help me in this regard, it will be highly appreciated.</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>Thanks in advance,</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>with regard,</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE>Mrs Krishnaveni, Dept. of ECE, PSG Tech, Coimbatore - 4</DIV>
<DIV class=RTE> </DIV>
<DIV class=RTE> </DIV>
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