Product manual

DE285 HD Caption Decoder/VANC Monitor
Caption Error Description
Unexpected DTVCC
continue
DTV pairs marked 0xFE should only appear
after an 0xFF pair. (See "Bad DTV triplet" for
definitions.)
Valid DTV data after
filler
If a 708 service block doesn’t fill the caption
data section, the remaining bytes should be
marked as filler.
Caption channel
packet sequence error
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.
Truncated caption
channel packet
Caption channel packets aren’t allowed to
span multiple VANC packets.
Invalid null service
block
A service block had service number zero but
non-zero length.
Multi-packet service
block
A service block was too long to fit in one
VANC packet.
Not defining window
X: too many rows
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.
Caption text overflow 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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