Junger Audio C8405 - SDI (3G/HD/SD) - Manual (Page 9)

digital audio
modular
processing system
C8000
3G/HD/SD SDI 16ch embedder/de-embedder
with video delay and VANC Dolby Metadata
C8405
Jünger Audio-Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany phone: +49-30-677721-0
fax:
+49-30-677721-46
[email protected]
www.junger-audio.com
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VANC Metadata
The C8405 may receive, decode and insert VANC Dolby Metadata into the c8k Metadata
distribution system for use by other modules inside a frame.
The transport of Dolby Metadata embedded into the Vertical Ancilliary data space of an SDI signal is
defined by SMPTE 2020 suite of standards. For details pls refer to such documents.
In general the mechanism may provide up to eight independent Dolby Metadata Streams. The
format of the streams is asynchronous data like one will find on the Dolby 9-pin serial Metadata
Interface of the Dolby decoders and encoders as well as the C8601 Dolby E/D decoder, the C8611
Dolby E encoder and the C8612 Dolby D/D+ encoder from Junger Audio.
The streams are identified by a DID Data Identifier (value 0x45). Each individual stream is identified
by its Secondary Data Identifier SDID. The SDIDs range from 1 to 9.
SDID 2 – 9 are used to identify the streams associated with a respective program. The SDID
number also tells which embedded audio signal pair (e.g. G1-1/2) carries the first pair of audio
channels for that program. The rule is that further audio channels belonging to the same program
must be embedded in consecutive order.
SDID 0x01 identifies a Dolby Metadata stream that is not associated with an audio channel pair and
may be used if only one VANC stream is embedded.
The Junger Audio system allows to de-embed up to two independent VANC Dolby Metadata
streams named A and B. You can select the respective SDID for the de-embedder.
The table at the bottom of the DE-EMBEDDER page shows the VANC streams found in an
embedded signal :
Via the VANC de-embedder routing you may link the respective Metadata to their audio channels.
The Junger Audio Metadata system inside the c8k frame makes use of the ASE User Bits to move
Metadata to other modules. If you disable the VANC routing these User Bits are transparent again
and carry the information from their source somewhere upstream.
The status panel at the left hand side in the GUI shows if the pre selected stream carries valid
Metadata (green) or not (red) :