LC2000/LC2000-IQ/LC4000/LC4000-IQ
RollCall Control Panel Channel Operation Screens
Issue 1 Rev 6
Page 148
© 2015 SAM
11.9.1 Source
The Source controls enable you to choose a timecode format for HD and SD input video: LTC
or VITC for HD, and VITC, ATC LTC, or ATC VITC for SD.
11.9.1.1
Source HD
For HD video standards, the supported input timecode format is ATC. This means that
timecode data formatted as LTC, VITC, or both will be detected at the input; however, only
one format can be selected.
•
LTC:
Select ATC LTC only if detected when video input is HD.
•
VTIC:
Select ATC VITC only if detected when video input is HD.
If the selected format is not detected at the input, no timecode processing will be available.
11.9.1.2
Source (SD)
For SD video standards, the supported input timecode formats are VITC and ATC. As with
HD, ATC can mean that timecode data formatted as LTC, VITC, or both will be detected at the
input; however, only one format can be selected.
•
VITC:
Select VITC only if detected when video input is SD.
•
ATC LTC:
Select ATC LTC only if detected when video input is SD.
•
ATC VTIC:
Select ATC VITC only if detected when video input is SD.
If the selected format is not detected at the input, no timecode processing will be available.
11.9.1.3
Status
The Status box reports which type of embedded timecode is detected within the video input to
this processing channel. If no valid timecode is detected, “None” is displayed.
11.9.2 Processing
The processing controls enable you to select a mode of operation for timecode processing.
11.9.2.1
Mode
Three modes are available for timecode processing.
•
Follow Input:
The input timecode is read every frame and the actual time elapsed
since timecode 00:00:00:00 is calculated. This elapsed time is then converted into an
output timecode that matches the output video frame, and inserted into the output.
There is an additional and complicated process to compensate for clock offset
between in and out, which will generate repeated or skipped timecodes as necessary,
just as happens when synchronizing at the same standard. If the output is
clock-locked to the input, this process has no effect.
•
Generate:
The unit generates the output timecode internally to match the output
video standard. You can specify a start time in the Timecode Entry box. See “Section
11.9.2.4 Generator” below.
•
Input Trigger:
The unit generates the output timecode from a specified input
timecode trigger. You can specify a trigger and start time in the Input Trigger Entry
and Output Timecode Entry fields. See “Trigger Config” on page 149.
