Common Applications
Caption Bridging
Caption bridging copies captions in either direct from/to the source video (AUX) from/to the master video output.
This happens automatically when you have a captioned video input connected to one input and a video with no
caption data to the other. The front panel LCD screen will indicate when the encoder is in Bridging mode.
Dual Encoding (Two Video Paths)
The HD492 can caption to two independent video channels, embedding the same closed captions in both
channels. Any two supported video standards can be combined on the inputs to produce closed-captioned video
on the respective outputs. For example, if 1080i60 HD-SDI is present on the Master input and NTSC SD-SDI is
present on the AUX input, the Master output will be closed-captioned 1080i60 HD-SDI and the AUX output will be
closed-captioned NTSC SD-SDI.
GPI Relocation
GPI Relocation allows on-command placement control of closed captions on your output to avoid blocking
essential action such as screen crawls and emergency information. You can control this feature by accessing the
Main section of the side menu of the encoder web interface and scrolling down to the GPI settings at the bottom.
The screen is mapped into 15 regions from top to bottom that can be protected with the use of GPI settings. If
you are creating a GPI switch and require a diagram of the GPIO Pinout – see the GPIO pinout / wiring detail
found in the Hardware Reference section of the manual
Figure 9: GPI Settings Found in “Main” Section of the Encoder Web Interface
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