FS1-X v1.1
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17.3 Downcvt AFD Dflt
This parameter selects how the Video Processor will operate when parameter 7
Downconvert Mode has been set to Auto AFD and no AFD codes are detected at the
selected input source (that is, this menu selects the default Downconversion to use when
AFD is absent). This parameter is in effect only when the input is HD (720p, 1080i, or
1080p) and the selected output format is SD (525i or 625i).
Closed Captioning
This parameter translates closed captioning from the SD CEA-608 format on line 21 to the
HD CEA-708 format and inserts it into the HD output video stream.
NOTE:
This parameter interacts with parameter 20 SD Line 21 Blanking; see the explanation for that
parameter also.
18 Caption Xlator
In standard definition video (525i59.94), closed captioning data is encoded and sent on
line 21 of both fields, using a format defined by the Consumer Electronics 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 FS1-X 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).
Hold Last (default)
Use the last detected AFD code and continue to use its aspect
ratio until a new AFD code is detected again in the SDI
metadata.
Crop
When AFD code is absent, switch the Downconverter mode to
Crop.
Anamorphic
When AFD code is absent, switch the Downconverter mode to
Anamorphic.
14:9
When AFD code is absent, switch the Downconverter mode to
14x9.
Letterbox
When AFD code is absent, switch the Downconverter mode to
Letterbox.
On (Upconverter)
When set to On and using the Upconverter, the FS1-X will
automatically translate incoming line 21 captions to CEA-708
format and insert 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).
On (Downconverter)
When set to On and using the Downconverters, the FS1-X will
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.
Off (default)
When Off, caption translation is not performed.
