SEL-1FS1/SEL-2FS1 and SEL-1XD1/SEL-2XD1
Installation and Operation Manual
Installation, Operation, and Specifications
© 2015 Imagine Communications Corp.
Proprietary and Confidential.
Version 2.8 | Page 67
Example
Dolby E is present in input processing channel 1, embedded audio channels 2A and 2B (or, Group 1 Pair
2). To pass this audio pair through the system while maintaining synchronization with video, set the
EMB 1 Grp 1 Pair 2 Embed Control
parameter to
Disable
. This will leave the original embedded audio in
this pair intact and not overwritten. Set the
EMB 1 ADS Clean
parameter to
No
. For an XD1 module, set
the
Proc Ch 1 Out Format
to
Proc Bypass.
Audio Embedding Control
The FS1 and XD1 makes it possible to embed audio on a pair-by-pair basis. Each embedder has four
groups, with two pairs in each group. Using the
EMB x Grp x Pair x Embed Control
parameters, you can
embed a single pair of audio at any one time.
Audio Embedding Modes
The audio embedder component in the FS1 and XD1 is composed of several smaller subcomponent
blocks:
•
One ancillary data stripper (ADS)
•
Four audio embedding subcomponents
The first subcomponent is an ancillary data stripper (ADS). This block removes all ancillary data packets
in the input SDI stream, prior to embedding.
Following the ADS block are four separate audio-embedding subcomponents. Each subcomponent has
the ability to operate on only one audio group, either appending or overwriting a predetermined group
onto the SDI stream.
The table below briefly describes the
Append, OverWrite, and Auto
options available from each of the
embedding modes.
Table 7:
Embedding Mode Options
Options
Description
Append
Attempts to insert the audio data and control packets immediately
following the last existing audio data/control packet in the horizontal
ancillary region (see Append Embedding (on page 68))
OverWrite
Attempts to overwrite existing audio data and control packets of the
same group number with the new audio data (see Overwrite
Embedding (on page 70))
Auto
Attempts first to overwrite existing audio data and control packets of
the same audio group number; failing that, it appends the new audio
data and control packets immediately following the last existing
audio data/control packet.
