EEP - cntreref

cntreref - Raw Data Rereferencing

Synopsis


-----------------------------------------------------------------------------
EEP 3.1  Max-Planck-Institute of Cognitive Neuroscience 1996-99
cntreref 3.2   (OSF1 V4.0 alpha)              Wed Sep 15 13:30:21 1999
-----------------------------------------------------------------------------
  cntreref <source cnt> <cfg> [<dest cnt>]

files:
  foo.cnt  ->  foor.cnt

Configuration File

; example configuration file for avrreref/cntreref

; rule for virtual reference calculation
[reference calculation]
CZ             ; the CZ channel is the new reference

;CZ, FZ, PZ    ; the mean of the listed channels is the new reference (CZ+FZ+PZ)/3

;CZ * 0.5      ; CZ * 0.5 is the new reference

;all, -CZ      ; the mean of all channels, except of CZ, is the new reference


; list of channels for rereferencing
[reference subtraction]
all, -eogv, -eogh   ; the virtual reference is subtracted from all channels,
                    ; except of EOGV, EOGH

;F1, F2, F3         ; the virtual reference is subtracted from the listed
                    ; channels only

; create a new channel in the output file which stores the virtual reference
;[reference insertion]
;REF                 ; label of the new channel

Description

cntreref computes a virtual reference channel from other channels and substracts this signal. Note that you could perform the rereferencing also "on the fly" in xcnt or later with the ERP's (xavr, avrreref). Thus, cntreref is mostly used to repair/unify raw data records with different reference settings, not for playing around with the reference effects.