Cobalt Digital Inc 3G Fusion 9921-FS, Руководство по эксплуатации продукта

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9921-FS-OM (V1.18) 9921-FS PRODUCT MANUAL
3-47
Operating Instructions
9921-FS Function Menu List and Descriptions
Provides upmixing of any normal PCM stereo pair into 5.1
surround sound audio. (Option +UM)
Upmixing
Note: • For any six channels selected for this function, the Left and Right channel selections always serve as the stereo input pair.
• Upmixing induces a 6 msec delay into the audio. This delay can be removed by setting either the bulk or channel Audio/Video
Delay controls to introduce a -6 msec advance. See Audio Bus Input Routing/Controls (p. 3-32).
• Up Mixer Mode Control Enables or bypasses upmixer as follows:
• Auto: 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 (described
below), upmixer produces new 5.1 content generated by the upmixer.
• 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,
upmixing is bypassed and the channels fed to the upmixer pass
unaffected to the upmixer outputs.
• Always Upmix: Manual enable turns on upmixer and overwrites content
on all six selected channels with new 5.1 content generated by the upmixer
regardless of original signal level or content.
• Bypass: Manual disable bypasses the upmixer. When bypassed, the six
input audio channels pass unaffected to the upmixer output.
• Upmixer Input Channel Selection Separate drop-down lists for Left, Right, Center, LFE, Left Surround, and
Right Surround allow a stereo pair to be upmixed to 5.1-channel.
The example here shows selection of bus channels 1 and 2 as the received
stereo source (Bus Ch1 and Ch 2 for Left and Right drop-down list
selections in the Upmixer Selection tool).
Using the setup shown in the example, when upmix is active (either forced
upmix or auto-enabled) the Upmix L thru Upmix Rs channels comprise a
5.1-channel upmix of the input stereo pair. If any content is present on the
monitored C, LFE, Ls, or Rs input channels whose is above a user-defined
level threshold (Bus Ch 3 thru Ch 6 in this example), all six inputs channels
pass through the upmixer, with upmixing bypassed.
Upmixer output channels Upmix L thru Upmix Rs are available as sources
for the card audio output routing.
Table 3-2 9921-FS Function Menu List — continued
•
•
•
Selects the audio input source to be
directed to the corresponding upmixer input
from the choices listed below.
• Bus Ch 1 thru Bus Ch 16
• LP L thru LP Rs (multiple if equipped with
multiple loudness processing)
•Tone 1 thru Tone 8
• Silence
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)
Upmix L
Upmix R
Upmix C
LFE
Upmix Ls
Upmix Rs
Upmix outputs
(available as
sources for
audio output
routing)