Installation & Operation Manual TCC70XS
Page 103
ATC: LTC/VITC
Mark for Deletion
Checking this box will mark all ATC data packets for deletion. The
data packets are still present and at the same location, but the data
content will not be evaluated anymore. The ATC reader of this module
receives the data packets independent from this set
–
up, i.e. this
function has an effect on the video output only. The Ancillary Data
Generator is able to insert new ATC data packets into this modified
data stream.
Only in HD Video
This module can detect SD and HD video formats automatically. If
you
don’t want to generate ATC data packets in SD video, check this
box. In this case, the ATC generator will be switched off automatically
if SD video is detected.
*1
SMPTE 12M
–
2 and ITU
–
R BT.1366
–
2 standards define the transmission of ancillary time
code packets.
ATC Packet Transmission Rate
VITC
(vertical interval time code) is defined as VITC#1 (ATC_VITC1) and VITC#2
(ATC_VITC2). This will be denoted as ATC_VITC for the user. VITC addresses each video
field by nature, so it is inserted field
–
wise and inclu
des a field mark flag (“F”).
LTC
(linear time code) is defined as ATC_LTC. LTC addresses each video picture by
nature (frame rate = picture rate), but ATC packets can be treated as a kind of video
time code and can be inserted field
–wise. Using the “
All Fields
“ set–
up, the transmission
rate of ATC_LTC can be selected: field
–
wise or frame
–
wise.
The following transmission rates are provided depending on video formats:
Interlaced and segmented frames formats, as well as progressive formats with
frame rates > 30. In the latter case, pairs of frames are regarded.
10:00:00:00.0
10:00:00:00.1
VITC#1, F = 0
VITC#2, F = 1
LTC
LTC
LTC
ATC_VITC
ATC_LTC: "All Fields" unchecked
ATC_LTC: "All Fields" checked
Frame Pair
Field 1
Field 2
1st Frame
2nd Frame
Picture
segmented frames
interlaced or
frame rate > 30
progressive with
Progressive formats with frame rates
≤
30:
10:00:00:00.0
VITC#1, F = 0
LTC
ATC_VITC
ATC_LTC: no matter of "All Fields"
Picture
