Crystal Vision
Appendix A
RGB and YUV Proc amps
Timecode and closed caption
The timecode and closed caption tab contains the AFD/ATC, VITC and CC line select
menu.
GPI alarm configuration
The Q-Down-ATG 3G can deal with both (ATC) ancillary data timecode (SMPTE
12M) and (D-VITC) vertical interval timecode (SMPTE 266M). ATC is particularly
useful when down converting progressive High Definition video to an interlaced High
Definition output. When outputting Standard Definition, Q-Down-ATG 3G will also
convert the ancillary timecode to vertical interval timecode. VITC code is always
repeated on two adjacent video lines, one in each field. The line pairs used are also
selectable to allow extra data to be encoded. If the ATC output is disabled, the
AFD/ATC line number will still select the line number, on which AFD will appear for
down-converted SD outputs. When using the Q-Down-ATG 3G to convert 1080p to
1080i output, the ATC and AFD are inserted in lines 9+571 and 11+547 respectively.
DTVCC, digital television closed caption (CEA-708) is down converted by Q-Down-
ATG 3G to 525i closed caption (CEA-608) which would normally be inserted onto line
21. Q-Down-ATG 3G allows this closed caption information to be inserted onto any of
line 12 to line 21. This includes extended data service (XDS).
The disabled LED will be illuminated when not down converting and TC and CC
control will be inactive.
Note
:
The ATC lock control is only active when a progressive video input is
present. When disabled the field sequence of the interlaced output will
free-run.
Q-Down-AG 3G/ATG 3G User Manual R2.1
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11 July 2019