VTX
NAME
vtx - convert lx to tx by Voiscope method
SYNOPSIS
vtx
(-i item) (-H high-pass) (-L low-pass) (-C time-const) (-T threshold) (-o) file
DESCRIPTION
vtx
estimates the location of pitch periods from a Layngograph waveform by the
method employed in the Voiscope. This consists of: (i) filtering, (ii) agc, and
(iii) peak following. Configuration of the filtering and the time constant of the
peak following can be set by program options.
Options
and their meanings are:
-I
Identify program and exit.
-i item
Select input item number.
-H high-pass
Set high-pass frequency edge. Default=80Hz.
-L high-pass
Set low-pass frequency edge. Default=2000Hz.
-C time-const
Set time-constant of peak follower. Default=0.0025s.
-T Peak detection threshold
Set threshold for peak detection. Default=750.
-o
Output glottal opening points. Default: closings.
INPUT ITEMS
2.xx
Laryngograph waveform.
OUTPUT ITEMS
3
Voiscope tx
VERSION/AUTHOR
2.0 - Mark Huckvale.
BUGS
Works best if Lx is right way up (up = more current flow).
SEE ALSO
HQtx
Wed Jul 17 22:31:35 2013