erd schema version 9

[jezdip1]

hello,

Im dealing with a new system from Natus in our lab. I have found your repository that seemed to be working with the ERD / ETC / STC ... whatever data consisting of EEG records.

Ive tried your ERD header fetching but succeed only in the generic part. It seems I have the scheme type 9 , but Im not able to get correctly the sampling frequency, neither number of channels. ehich is a bit crucial for another parsing

where did u get the info about ERD filetype? could you plese provide it? or would you have any hint for me?

[brandtd]

I've reached out to my former advisor (here's hoping he's not filtering e-mails from 10 years ago) to see if he has any ideas. I searched through the copies of notes and code that I've got and came up blank. There's enough detail in there that I must have had a reference, but sorry, I can't for the life of me remember what it was, and all I can find online is people asking about the format.

[jezdip1]

Well. Thanks for the answer. Ive found the trouble in my format. There were two more bytes to read before the sampling frequency. So now Im allright with most of the header and trying to parse the data.

This format seems to be crazy - baseline + increment decrement value for next sample. I left my lab today and continue tmorrow. If u have anything that could help it would be more than welcome. If not I hope Ill make it somehow using your codes as an inspiration

Thanks

Peter

Dne po, 18. 6. 2018 17:22 uživatel brandtd notifications@github.com napsal:

I've reached out to my former advisor (here's hoping he's not filtering e-mails from 10 years ago) to see if he has any ideas. I searched through the copies of notes and code that I've got and came up blank. There's enough detail in there that I must have had a reference, but sorry, I can't for the life of me remember what it was, and all I can find online is people asking about the format.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/brandtd/eyeblink/issues/1#issuecomment-398092215, or mute the thread https://github.com/notifications/unsubscribe-auth/AmfPsLCdOOuFrUZ8hwnxmiWGnquNVMtfks5t98WfgaJpZM4UrnTk .

[brandtd]

Looking at the code, they appear to be using a form of delta coding for the signals. I’m not an expert, so instead I’ll just link to things that look like they were written by people that understand:

http://paulbourke.net/dataformats/compress/ https://en.m.wikipedia.org/wiki/Delta_encoding

[dbpgithub]

Hi Dan,

It took a bit to recognize your name and the topic. I’ll take a look, but I have been doing a lot of admin and negotiating for the last 8 or 9 years, so I’m not sure if those neurons have atrophied or not.

Thanks,

Dan

From: brandtd notifications@github.com Reply-To: brandtd/eyeblink reply@reply.github.com Date: Monday, June 18, 2018 at 12:01 PM To: brandtd/eyeblink eyeblink@noreply.github.com Cc: Subscribed subscribed@noreply.github.com Subject: Re: [brandtd/eyeblink] erd schema version 9 (#1)

Looking at the code, they appear to be using a form of delta coding for the signals. I’m not an expert, so instead I’ll just link to things that look like they were written by people that understand:

http://paulbourke.net/dataformats/compress/ https://en.m.wikipedia.org/wiki/Delta_encoding

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHubhttps://github.com/brandtd/eyeblink/issues/1#issuecomment-398105587, or mute the threadhttps://github.com/notifications/unsubscribe-auth/ADpLl6pIznK0DkpnbIbg9OSgLsozK2XYks5t986-gaJpZM4UrnTk.

[brandtd]

@jezdip1

If it helps, I'm fairly certain the xltek code worked on some datasets that we had, but I couldn't tell you which schema they were following. The code was used to access some data in studies conducted by a student around 2007 (converting that data to .csv files for easier processing). I suspect we had access to something outlining the data format, but I fear it's been lost to time.