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3–46 • Operating Instructions LDP-8242 User Manual (Iss. 03)
Metadata Routing and Embedding
Provides input and output support of Dolby metadata routing between the
Dolby decoder/encoder and serial/video interfaces.
Note : After familiarizing yourself with the controls described here, see the following page for an example showing interrelated use
of these controls.
Serial Port Selectors For serial ports 1 and 2, selects the source for metadata to be exported
(outputed) from the card over a port as shown from the choices listed to
the left and shown below. ( None selection frees the port to be used as an
input.)
Note : If settings here and described below attempt to set a given port as
both an output and an input, Serial Ports Conflicts status display
indicates conflict (e.g., “Port A configured as both input and output”.))
VBI SMPTE 2020 Embedding Source
Selector
For VBI embedding at the card SDI output, selects the source of metadata
to be exported (outputed) from the card from the choices listed to the left
and shown below.)
SDI Input VBI Metadata Status Display Indicates if Dolby metadata is present on input SDI VBI, as well as VBI
line number. (If no metadata present, displays “Not Present”.)
Metadata Embedding Embedded Metadata Output enables SMPTE 2020-1 metadata
embedding in the SDI video output, as selected using controls described
above.
Embedded Output Line allows selection of SMPTE 2020-1 metadata line
location within the VANC space for re-inserted Dolby® metadata.
(Range is 9 thru 41)
Note : Although the output line drop-down will allow any choice
within the 9 thru 41 range, the actual range is automatically
clamped (limited to) certain ranges to prevent inadvertent conflict
with active picture area depending on video format. See Ancillary
Data Line Number Locations and Ranges (p. 3-9) for more
information.
The card does not check for conflicts on a given line number. Make
certain the selected line is available and carrying no other data
unless existing metadata is to be intentionally overwritten.
Typically, when encoding is active it is recommended that whatever
metadata source the encoder is using (e.g., input video SMPTE
2020, decoder, or serial) be also applied to metadata output
embedding, and also that the line number be set to overwrite
obsolete input VBI metadata. This avoids any ambiguity of having
different metadata packets on multiple lines.
Port 1
as output
Dolby®
Decoder
Dolby® Decoder
Input Video (VBI metadata)
(Input)
Output SMPTE
2020 VBI
metadata
embedding
Dolby®
Decoder
Dolby® Decoder
Serial Port 2
None
Serial Port 1
Input Video (VBI metadata)