BDF structure

[Chanel]

Hi,

I'm working on the Biosemi BDF files and I'd like to know how many
samples there is in a BDF record. I found that there is 1024 for the files
I recorded from the Biosemi software. Is it a fixed number or is it linked to
the sampling frequency ? Can I find this information in the file ?

thanks

Guillaume Chanel

[Coen]

ActiView writes BDF file with 1 second record length. So, the number of samples in a record is equal to the sampling rate. The number of samples per record is always listed in the file header, see http://www.biosemi.com/faq/file_format.htm

Best regards, Coen (BioSemi)

[Nurhi]

Hi;

I am working with Biosemi BDF files and would like to transfer them into MATLAB, I use the free downloadable bdfreader routinesb from Biosemi website. I make a recording with 512 Hz for 10 seconds, but when I transfer them with .bdf reader, only one second is visible. The rest of the data can not be seen.
I would like to analyze the 10 second data, how can I change the duration?
Any help would be appreciated.

Thanks..