AJA FS2 - Manual (Page 109)

1
109 FS2 Installation and Operation Manual — VIDEO 1 and VIDEO 2 Menu Groups
Association standard, CEA-608. This is traditionally called “line 21", “SD”, or “608”
captioning, and is used for analog composite, analog component, and serial digital
(SDI) video.
In high definition video, closed captioning is encoded and sent as Vertical Ancillary
(VANC) packets in SDI video, using a format defined by the Consumer Electronics
Association standard CEA-708 (there is no equivalent for analog HD video). This is
traditionally called “HD,” “DTV,” or “708” captioning. The data formatting and
encoding for 708 captions is very different from the data contained in 608 (SD)
captioning, reflecting the added features and capabilities available with the CEA-708
standard.
When the Caption Translator is on, the FS2 UpConverter automatically translates
incoming line 21 captions to CEA-708 format and inserts the VANC packets into the
converted HD video stream. This is a complete translation from CEA-608 format to
CEA-708 format (including the embedded SD captions).
The FS2 DownConverters automatically intercept and reformat the SD caption data in
the incoming CEA-708 VANC packets, and output it on line 21 of the standard
definition outputs.
19 Input Scan
Format This parameter determines how the Deinterlacer handles interlaced vs. pSf inputs.
Normally, this control will only be used to indicate that a 1080PsF25 input is PsF and
not interlaced.
If Auto is selected, the system will look for clues in the source's SMPTE 352 (Payload ID)
data and respond accordingly. If there is no SMPTE 352 information, the system will
assume that 23.98/24 fps sources are PsF, and 25/29.97/30 fps sources are interlaced.
If Progressive is selected, the system will assume that all sources are PsF (even if there
is SMPTE 352 data to the contrary).
If Interlaced is selected, the system will assume that all sources are interlaced (even if
there is SMPTE 352 data to the contrary).
19 Scan Format Selections Selection Descriptions
Auto (default)
Progressive
Interlaced
Deinterlacer detects input source payload ID data and sets the
processing format accordingly.
Assumes all input sources are progressive.
Assumes all input sources are interlaced.