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P VD 5840 Reference Manual. Rev 3.0
DolbyE Guardband Alignment: The AES path delay for DolbyE encoded
streams will make sure that the DolbyE bitstream is embedded into an SDI
stream with correct timing alignment of the Dolby Guardband.
DolbyE Guardband alignment can only be achieved for one SDI embedder per
internal audio path. I.e. if one internal audio path carries a DolbyE stream, and if
this DolbyE stream is embedded into more than one SDI output, then the
Guardband Alignment is adjusted for that one SDI stream that had been
connected first. The DolbyE Guardband Alignment can then potentially be
inaccurate for the other SDI output. In this case, the input crossbar should be
used to route that one DolbyE stream over two independent internal audio
streams. Each of these internal audio streams can then achieve the correct
Guardband Alignment for its own SDI embedder.
NOTE: see here for more information on DolbyE Guardband Alignment:
http://www.dolby.com/us/en/technologies/dolby-e-preferredalignment.html
NOTE: Internal Parameters AudioDolbyETiming* can be used to take manual
influence on the SDI channel that shall control the Guardband Alignment
position. See 67 for info on the Parameters-Tab.
Audio Crossbars
After going through the audio processing stage, each internal audio stream is
delivered to the output audio crossbar. Here, each of the possible audio
destinations (embedder and external outputs) can select from all of the available
signals.
The APPolo Control software offers two different types of audio cross bar
controls. The type of control can be determined in the “view” menu of the APPolo
Control software.
Matrix Control
With this control mode activated, hovering over
the audio crossbars will show a checkered
matrix field.
The switching principal is identical to a
traditional matrix. Move the mouse pointer to
the cross point where the desired input and
output cross and press the left mouse button.
The switched cross points are indicated by a
blue frame around the cross point
Figure 40: Audio Matrix
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