GUIDE TO INSTALLATION AND OPERATION
16
| ADX-1901
GPI Status:
The GPI Content icon shows the presence of GPI information in the embedded timecode at the SDI input
The two GPI status icons show the status of the two GPI outputs on the rear-panel RJ45 connector.
GPI De-embedding:
Set up the de-embedding of GPI data from the input data streams.
•
SD Extract Line:
Use the pulldown to specify the line number from which to extract a time code (SD only).
[AUTO, 10 to 20 (SD525), 7 to 22 (SD625)]
In AUTO mode the ADX-1901 extracts the GPI from the first timecode encountered in the vertical blanking
interval. For example, if timecode is present on lines 12 and 14, the line 12 timecode will be extracted.
•
GPI Latch Mode:
When no valid time code with embedded GPI data has been detected, the user has the
option of releasing the GPI outputs (Latch mode OFF), or holding the last valid de-embedded values (Latch
Mode ON).
For each of the two GPIs:
•
Mode:
Use the pulldown list to select the operating mode for this GPI:
o
OFF – the GPI output state is inactive.
o
De-embed – the GPI data located on a pre-defined user bit within timecode in the incoming SDI signal is
de-embedded.
When De-embed is selected, use the Bit pulldown list to set which of the user bits (1-16) will be
selected to de-embed the GPI data. The default is: GPI 1 on bit 1; GPI 2 on bit 2.
5.3.2 Audio tab
This tab provides resources to configure the input and output
selections and processing of audio metadata for the ADX-1901
card.
VANC Metadata Extractor
The card can extract an audio metadata stream from the VANC
interval.
•
The icon flags the presence of the audio metadata
•
Extraction is controlled by the SDID selected by the
pulldown:
(range = 01 to 09).
Delay
Use the two sliders – coarse (ms), and fine (samples) – to adjust
the delay of the extracted audio metadata by up to 2.7 seconds
to account for video/audio timing differences.
Output Serial Stream
The de-embedded metadata can be output as an RS-422
datastream on the RJ45 rear panel connector. Select the RS-
422 status as OFF or Metadata using the pulldown.
The SDID is used to specify the relationship between the VANC
metadata stream and the first channel of its associated audio program.
Figure 5-5 Metadata – Audio tab
