EEG DE285 HD Product Manual page 34

Hd caption decoder/vanc monitor
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Caption Error
Unexpected
DTVCC
continue
Valid DTV data after
filler
Caption
channel
packet sequence error
Truncated
caption
channel packet
Invalid
null
service
block
Multi-packet
service
block
Not defining window
X: too many rows
Caption text overflow
Copyright ©2009-2011 EEG Enterprises, Inc.
DE285 HD Caption Decoder/VANC Monitor
Description
DTV pairs marked 0xFE should only appear
after an 0xFF pair. (See "Bad DTV triplet" for
definitions.)
If a 708 service block doesn't fill the caption
data section, the remaining bytes should be
marked as filler.
Caption channel packets have a two-bit se-
quence counter; this means that there was a
skip. This will usually happen at the same
time as CDP sequence mismatches; it's un-
likely that one would skip and the other
wouldn't.
Caption channel packets aren't allowed to
span multiple VANC packets.
A service block had service number zero but
non-zero length.
A service block was too long to fit in one
VANC packet.
The FCC requires that decoders be capable
of displaying at least four rows. This effec-
tively means that any captioning with more
than four rows is not guaranteed to work on
all decoders. This message can be triggered
by a single window with more than four rows
or multiple windows whose rows add up to
more than four.
The caption text can't fit in the current row;
some of it was dropped. This may happen if
certain commands(e.g., create a new window,
move to the next row) are lost.
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33

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