IQUDC30/IQUDC31/IQUDC32/IQUDC33
Operation Using the RollCall Control Panel
Issue 1 Rev 4
Page 81
© 2016 SAM
5.13 Metadata-Ch1 and Ch2
The Metadata-Ch1 and Ch2 screens enable you to control a set of closed captions and
teletext subtitle information.
5.13.1 Closed Captions
Closed Captions covers CEA-608 and CEA-708 specified captioning. Although these
specifications support captioning in multiple video standards, CEA-608 is only supported in
525 input or output as a line 21 signal. CEA-708 is only supported in 59 Hz HD video
standards as a VANC packet with a Caption Distribution Packet (CDP) payload.
Closed Caption pass-through is possible if a valid input closed caption is present and input
and output video standards are the same.
Closed Caption transcoding is supported from CEA-608 to CEA-708 by taking the decoded
bytes from the line 21 signal and inserting them into the compatibility byte within the CDP.
Transcoding from CEA-708 to CEA-608 is possible if the CDP contains compatibility bytes,
which are extracted and encoded as an output line 21 signal.
Closed captions are automatically detected in the input video, and the detected format shown
in the Status window. For closed captions to be embedded in the output video, they must be
enabled. User control for on which line to embed CEA-708 is provided, but CEA-608 is always
fixed at line 21.
Note:
The Metadata-Ch2 screen is only applicable to the IQUDC31 and IQUDC33.
