The external subtitler configuration panel – Grass Valley iTX System v.2.6 User Manual
Page 178
Configuring channel plug-ins
The External Subtitler Configuration panel
You set up iTX to work with an external subtitler in the External Subtitler Configuration panel:
You select the communications protocol for the external subtitler in the Available Protocols
box; the protocol name appears in the text box at the top of the panel.
You enter the i.p. address of the subtitler in the Location box. For a Polistream system, the
entry should be the short name of the Polistream Channel Server (which you can check in the
Polistream Config Client tool).
In the Port box, you enter the number of the port used for communications between iTX and
the subtitling system. For a Polistream system, the required number is the one that the
Polistream Name Exporter uses when communicating with the Name Maintainer on the Output
Server; Screen Subtitling Systems Ltd provide this number. For Cavena, the port number is
4703.
If the Cavena protocol has been selected, a Service ID number must be configured. This is a
number that identifies the STC output to which the STU for the particular iTX channel is
connected.
For a system that has main and back-up Output Server machines, two hardware configurations
are possible:
•
The master-slave pair of channels may share an external subtitler. For this
configuration, you select Shared Device; only the main Output Server then controls
the subtitler.
•
The master and slave channels may have separate subtitlers. You then need to ensure
Shared Device is not selected; each Output Server controls its own subtitler, with the
main output being routed into the transmission path.
Note:
•
An external subtitler requires timecode to be present in the video signal it receives
from the Output Server. If any video clips that iTX is to play out do not contain
timecode, you need to set up iTX to generate it.
•
For a Polistream system, the network should allow bi-directional UDP
communications.
March 2015
System Administrator Guide
Page 178 of 404