Cobalt Digital Inc 9305 Product Manual page 13

Introduction
From Audio Routing/Gain Control
From Audio Routing/Gain Control
Note: In either case shown here,
the unselected channels
(in this example, Emb Ch
7 thru Ch 16) are not
involved in this process
and always pass
unaffected.
9305-OM (V4.1)
•
If a signal level below a selected threshold on all four of the selected
channels designated as
that these channels are not carrying 5.1. In this case, the upmixer
overwrites all six selected channels with the new 5.1 content.
•
If a signal level above a selected threshold on any of the four selected
channels designated as
channel(s) are already carrying viable 5.1 content. In this case,
upmixing is bypassed, allowing the original channels to pass
unaffected.
The examples in Figure 1-4 show the automatic enable/disable up-mixing
function applied to example selected channels
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). Note also that this function is applied
after the Audio Delay and Audio Routing/Gain Control functions.
Emb Ch 1 – Ch 16
>
With all detected signal levels on
Emb Ch 3 – Ch 6 below
threshold, upmixer is active and
overwrites with new 5.1.
- 20 dBFS
- 60 dBFS
Below Threshold
Emb Ch 1 – Ch 16
>
With any detected signal levels
on Emb Ch 3 – Ch 6 above
threshold, upmixer is bypassed.
- 20 dBFS
Above Threshold
- 60 dBFS
Figure 1-3 Up Mix Auto Enable/Bypass with Example Sources
9305 PRODUCT MANUAL
,
C LFE
,
C LFE
Emb Ch 1
Emb Ch 2
Emb Ch 3
Emb Ch 4
Emb Ch 5
Emb Ch 6
(Overwrite)
To Audio Embed
Emb Ch 1
Emb Ch 2
Emb Ch 3
Emb Ch 4
Emb Ch 5
Emb Ch 6
(Bypass)
X
To Audio
Embed
9305 Functional Description
, , and is present, this indicates
Ls Rs
, , and , this indicates that the
Ls Rs
thru
Emb Ch 1 Emb Ch 6
5.1 Up Mix
Threshold
Detect
L – Emb Ch 1
R – Emb Ch 2
L
C – Emb Ch 3
R
LFE – Emb Ch 4
(C)
Ls – Emb Ch 5
(LFE)
Rs – Emb Ch 6
(Ls)
(Rs)
Selected channels Emb Ch 1 – Ch 6
are overwritten with the new 5.1
upmix content.
Threshold 5.1 Up Mix
Detect
X
L
X
R
(C)
(LFE)
(Ls)
(Rs)
Because the selected channels are
already carrying viable content,
upmixing is bypassed, allowing the
six original Emb Ch 1 – Ch 6 to pass
unaffected.
. As
1-9