riff2eep - EEP 2.0 Format Export
Synopsis
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EEP 3.1 Max-Planck-Institute of Cognitive Neuroscience 1996-99
riff2eep 3.8 (OSF1 V4.0 alpha) Wed Sep 15 13:30:11 1999
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riff2eep <source cnt> [<dest cnt>]
files:
foo.cnt -> fooc.cnt
foo.rej
Description
riff2eep converts compressed EEP data to the uncompressed EEP
2.0 format. The separate rejection data of EEP 3.x are mangled into the
destination file.
The compressed file data blocks are transformed as follows:
- archived NeuroScan/EEP 2.0 header
- if present, copied from source to destination; the current EEP 3.0
header informations are written over this (maybe invalid) header
- signal
- is decompressed; the control informations (trigger, rejections) are
mangled into the signal data
- trigger
- The trigger codes from the <evt > chunk of the source file
which are coded as integer numbers from 1..255, "Rs" (DC-reset) or "__"
(discontinuity) are converted. All other triggers cannot be stored in the
EEP 2.0 files.
Some informations cannot be stored in EEP 2.0 files:
- signal data bits 16..31
- are completely lost
- non-integer sampling rates
- are rounded to the next integer, all external control files become invalid
- channel units
- are completely lost, everything in a EEP 2.0 file is assumed to be a
voltage