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9932EMDE-OM (V1.4) 9932-EMDE PRODUCT MANUAL
1-15
Introduction
9932-EMDE Functional Description
•
If the upmixer detects signal level above a selected threshold on any
of the three selected channels designated as
C
,
Ls
, and
Rs
, this
indicates to the upmixer that the channel(s) are already carrying
viable 5.1 content. In this case, the upmixer is bypassed and the
channels fed to the upmixer pass unaffected to the upmixer outputs.
The examples in Figure 1-6 show the automatic enable/disable upmixing
function applied to example selected channels
Bus Ch 1
thru
Bus Ch 6
. As
shown and described, the processing is contingent upon the signal levels of
the channels selected to carry the new 5.1 upmix relative to the selected
threshold (in this example, -60 dBFS).
Figure 1-6 Upmixing Auto Enable/Bypass with Example Sources
Bus Ch 1 – Ch 16
>
From
Internal
Bus
Bus Ch 1
Bus Ch 2
Bus Ch 3
Bus Ch 4
Bus Ch 5
Bus Ch 6
L
R
(C)
(LFE)
(Ls)
(Rs)
With all detected signal levels on
Bus Ch 3, 5 and 6 below
threshold, upmixer is active and
generates new 5.1 content.
Threshold
Detect
5.1 Upmix
Bus Ch 1 – Ch 16
>
Bus Ch 1
Bus Ch 2
Bus Ch 3
Bus Ch 4
Bus Ch 5
Bus Ch 6
L
R
(C)
(LFE)
(Ls)
(Rs)
Threshold
Detect
Because the selected
channels are already carrying
viable content, upmixing is
bypassed, allowing the six
original Bus Ch 1 – Ch 6 to
pass through upmix outputs
Upmix L thru Upmix Rs
unmodified.
With any detected signal levels
on Bus Ch 3, 5 or 6 above
threshold, upmixer is bypassed.
- 20 dBFS
- 60 dBFS
Above Threshold
(Bypass)
C Ls Rs
- 20 dBFS
- 60 dBFS
Below Threshold
(Overwrite)
C Ls Rs
From
Internal
Bus
Upmix L
Upmix R
Upmix C
LFE
Upmix Ls
Upmix Rs
Upmix outputs
consist of new
upmix content