Cobalt Digital FUSION 3G 9921-FS 3G_HD_SD Frame Sync - Manual (Page 100)

3
9921-FS Function Submenu List and Descriptions
3-48 9921-FS PRODUCT MANUAL 9921-FS-OM (V1.15)
(continued)
• 5.1 Detection Threshold Control Adjusts the threshold at which selected channels designated as C, LFE, Ls,
and Rs are considered to have viable content, or at which signal levels can
be considered insignificant when upmixer enable is set to Auto. Setting
affects automatic enable/bypass of 5.1 upmix function as follows:
• If detected signal level on all three of the selected channels designated as
Center, Left Surround, and Right Surround are below the level threshold
set using the 5.1 Detection Threshold control, upmixer allows overwrite
of all six selected channels with the new 5.1 signal complement.
• If detected signal level on any of the three of the selected channels
designated as Center, Left Surround, and Right Surround is above the
level threshold set using the 5.1 Detection Threshold control, upmixer is
bypassed, thereby releasing the selected six channels and allowing the
original channels to pass unaffected.
(Range is -150 dB to 0 dB in 0.1dB steps;
0 dB equivalent to +24 dBu=> 0 dBFS)
• Center Width Control Adjusts center channel content (in terms of percentage) applied to L and R
channels.
• Minimum setting keeps all L+R (mono) content confined to center (C)
channel, with any center channel content removed from L and R channels.
• Higher settings progressively blend respective L and R mono content back
into L and R channels, with 100% setting resulting in center channel level
going to zero and L/R channels becoming normal L/R channels containing
some mono content.
(0% to 100% range in 0.1% steps; default = 0%)
• Surround Depth Control Adjusts surround channel content (in terms of percentage) applied to Ls and
Rs channels.
• Maximum setting results in greatest surround channel levels.
• Lower settings progressively diminish surround channel levels, with 0%
setting resulting in no Ls or Rs level, with Ls and Rs content progressively
folded back into L and R, respectively.
(0% to 100% range in 0.1% steps; default = 100%)
Table 3-2 9921-FS Function Submenu List — continued
Typically, the 5.1 Detection Threshold control should be set to provide
a usable threshold that maintains a threshold at which valid levels large
enough over the threshold disable the auto upmix (
, left), while
nuisance levels
considerably below the
threshold (
, left) are
rejected, allowing the
upmixer to stay locked in
the enabled mode and
overwrite these signals
with the new signals.
Optimum setting is
dependent on program
material general overall
levels. A -60 dB setting is
recommended for material closely adhering to the SMPTE -20 dBFS
Alignment level for normal material such as dialog.
A
B
- 20 dBFS
- 60 dBFS
Above Threshold
(Bypass)
Below Threshold
(Overwrite)
A B
C Ls Rs C Ls Rs