FS-HDR Frame Synchronizer/Converter/HDR-WCG Processor v1.0r1 76 www.aja.com
1.3 Downconvert AFD dflt
This parameter selects what occurs when the Downconvert Mode parameter
has been set to “Auto AFD” (see
"8 Downconvert Mode" on page 83
and no AFD
codes are detected at the selected input source.
Hold Last (default)
Crop
Anamorphic
14x9
Letterbox
Hold the last setting.
Image is cropped to fit new screen size.
HD image is converted to full-screen SD with a 16x9 aspect ratio
(anamorphic).
Image is reduced slightly with aspect ratio preserved. Black is added
top and bottom, and the left and right sides are cropped.
Image is reduced with black top and bottom added to image area,
with the aspect ratio preserved.
2 Caption Xlator
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 output video stream.
Off (default)
When Off, caption translation is not performed.
On
When set to On, the FS-HDR will automatically translate incoming line
21 captions to CEA-708 format and insert the VANC packets into
the converted video stream. This is a complete translation from
CEA-608 format to CEA-708 format (including the embedded SD
captions).
NOTE: This parameter interacts with parameter SD Line 21 Blanking, see below.
In standard definition video (525i59.94 or 625i50), 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 FS-HDR 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).
3 SD Line 21 Blanking
This parameter determines whether the FS-HDR blanks line 21 closed captioning
data prior to video processing of an SD 525i video input. (Line 21 normally
occurs at the top of the raster in the overscan area of video, so the presence of
captioning data or blanking does not interfere with the visible SD or Upconverted
video.)
Blank (default)
Pass
Auto blank
This setting copies caption data and blanks 525i input video Line 21
caption data before conversion, and may or may not include that
data (see above).
Passes input video unaltered to the converter and to the outputs.
Automatically detects caption data on SD input, passing unaltered
video if no line 21 caption is present, and reinserting caption data if
18 Caption Xlator is On.
