HD1492 HD Encoder Frame Card
for secondary language captioning. When 608 data is up-converted to
create 708 data, CC1 data is assigned to Service 1, and CC3 data is
assigned to Service 2. Text and XDS data is preserved in 608 down-
compatibility bytes, but is not up-converted.
The Local Entry Modes described in this section are used for local in-
sertion of data into caption channels only; see the next section of the
manual for XDS insertion mode.
3.4.2
Regeneration Mode
Upstream regeneration is used when no other local entry mode is en-
abled for a caption channel. The Encoder’s default action is to regener-
ate the caption data recovered from the HD video input. If no upstream
HD captioning is present, data from the SD input will be used instead.
The default Regeneration response is configurable by using the com-
mands listed in this section, and also by setting the Block 608 Upcon-
version GPI switch.
Regenerate Upstream VANC:
<CTRL+A>! [ON/OFF] <ENTER>
Instructs the Encoder to either detect and potentially regenerate (de-
fault) or ignore incoming VANC data from the HD video input. If the
encoder is set to ignore upstream VANC data, output signals will in-
clude only caption data recovered and regenerated from the SD video
input. Use OFF to ignore upstream VANC caption data, and ON to re-
sume detecting upstream VANC caption data.
Ignore Upstream L21 Channel:
<CTRL+A>6 Channel <ENTER>
Return Upstream L21 Channel:
<CTRL+A>7 Channel <ENTER>
Instructs the Encoder to ignore incoming Line 21 data from the SD video
input in the specified caption channel. When Line 21 data in a channel
is ignored, output signals will not contain any caption data recovered
from the SD video input in that channel, even if there are no other data
sources available.
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