Cobalt Digital Inc 3G Fusion 9931-EMDE Product Manual page 14

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9931-EMDE Functional Description
Frame Sync Function
This function provides for frame sync control using either one of two external
reference signals distributed with the card frame, or the
FRAME REF IN (1,2)
input video as a frame sync reference.
This function also allows horizontal and/or vertical offset to be added
between the output video and the frame sync reference.
Frame sync can select from either of two card frame reference sources, input
vdeo, or free-run (internal clock) video sync. Selectable failover allows
alternate reference selection should the initial reference source become
unavailable or invalid. In the event of input video loss of signal, the output
can be set to disable video, go to black, go to an internal test signal generator
pattern, or freeze to the last intact frame (last frame having valid SAV and
EAV codes).
An internal test signal generator provides a selection of 10 standard patterns
such as color bars, sweep patterns, and other technical patterns. The generator
output can be invoked upon loss of program video input, or applied to the
program video output via user controls.
Timecode Processor
(See Figure 1-3.) This function uses extracted timecode data from the input
video (waveform or ATC), reference VITC waveform, or internal (free run)
and in turn re-inserts selected timecode data into the program video signal.
The function can monitor video input and reference input for supported
timecode formats, and then select and prioritize among SDI VITC waveform,
SDI ATC_VITC, and SDI ATC_LTC timecode sources. If the preferred
format is detected, the preferred format is used by the card; if the preferred
format is not detected, the card uses other formats (where available) as
desired.
The function also provides conversion between various timecode formats and
provides independent insertion and line number controls for each SDI
timecode output format.
When licensed with option , this function also can
+LTC
receive, send and translate between audio/RS-485 LTC timecode formats and
®
the VBI formats described above. Refer to catalog or Fusion3G manual
supplement OPT-F3GLTC-MS for more information.
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9931-EMDE PRODUCT MANUAL 9931-EMDE-OM (V1.17)