Ross OpenGear HDC-8223A, Руководство пользователя

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1–4 • Introduction HDC-8223A(-S) User Manual (Iss. 03)
Frame sync can select from either of two card frame reference sources, or free-run input video
sync. 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.
Closed Captioning Processor
This function provides support for closed captioning setup. When receiving HD-SDI, both
CEA 608 and CEA 708 are supported, with CEA 608 and CEA 708 (containing CEA 608
packets) converted to line 21 closed captioning on outputs down-converted to SD.
Timecode Processor
As illustrated in Figure 1.1 , this function provides for extraction of timecode data from the input
video, and in turn re-insertion of timecode data into the output SDI or analog composite. In this
manner, timecode data can be preserved, even after format conversion. The function can monitor
the SDI video input of the card for supported timecode formats and convert the timecode to either
or both ATC_VITC or VITC waveform (with selectable odd/even field line number control).
ATC_VITC and VITC waveform outputs are available on SD-SDI outputs; VITC waveform only
is available on CVBS outputs.
Figure 1.1 Timecode Processor
3G/HD/SD-SDI
PRIORITY /
SELECT
SDI VITC
DETECT/EXTRACT
SDI ATC_VITC
DETECT/EXTRACT
SDI ATC_LTC
DETECT/EXTRACT
SDI
VIDEO
IN
INSERT
CONTROL
LINE NUMBER
CONTROL
VITC WAVEFORM
TIMECODE
PROC / EMBED
ATC_VITC TIMECODE
PROC / EMBED
VIDEO OUTPUT
(TO SDI DA
AND VIDEO DAC)
BUFFER /
FORMAT