The European
Data Format (EDF) is described in the article
by
Bob Kemp, Alpo Värri, Agostinho C. Rosa, Kim D.
Nielsen and John Gade
"A simple format for exchange of digitized polygraphic
recordings"
Electroencephalography and Clinical Neurophysiology,
82 (1992) 391-393.
SystemPLUS software by Micromed
Validation of EDF compatibility, Bob Kemp,
18-FEB-2004
Note that this is about EDF and not about EDF+
Disclaimer and copyright
My colleagues and I are good at EDF, but
we can make mistakes for which we do not have any insurance. Our
understanding
of the validated software and systems is limited. Of course, any
obvious
mistakes will be corrected when brought to our attention. And I want to
provide objective and trustworthy information about EDF. But we cannot
accept any liability related to this validation. This is not an
official
certification body. So any damages related to this validation or
publication
are the risk of the company mentioned above.
This report, or parts of it, may only be
published
by myself through my EDF webpages.
SOFTWARE USED TO MAKE THE VALIDATED FILES
| Manufacturer | Contact person | Software name and version |
| Name: Micromed s.r.l. State/Country: Italy URL: www.micromed-it.com |
Name: Cristiano Rizzo State/Country: Italy Email: cristiano.rizzo@micromed-it.com |
SystemPLUS version 1.02.995 |
REPORT
The files contained EEG,
EOG,
EMG, Sound, Respiration, Body movement, Marker, ECG and related
parameters,
and SpO2. Tests were done using our EDF
header checker. An EDF expert has further checked the header for
internal
consistency.
| Recording1 | Recording2 | Recording3 | |
| Date/time of recording | 21-FEB-2002 22.08.54 |
13-MAR-2000 22.39.45 |
22-Feb-2002 22.11.13 |
| Recorded signals | 35 | 35 | 35 |
| Duration of recording | 78s | 51s | 61s |
| EDF file name | Test_1.edf | Test_2.edf | Test_3.edf |
| Errors reported automatically | None | None | None |
Errors found by the expert: none.
Warnings (not formal EDF errors):
- Non-electrode signals, such as respiration and body movement,
are defined and calibrated at the electrical output of the sensor
('physical
dimension' uV) rather than at their physiological input ('physical
dimension'
volume/time or displacement/time).
- 'Transducer type' needs to be specified by the user, rather than
being specified automatically by the hardware.
