Cobalt Digital FUSION 3G 9985 3G_HD_SD Loudness Processor - Manual (Page 24)

1
9985 Functional Description
1-20 9985 PRODUCT MANUAL 9985-OM (V1.18)
The example in Figure 1-9 shows routing of embedded output channels Emb
Out Ch 1 thru Ch 6 fed through the loudness processor. A master output gain
control is provided which allows fine adjustment of the overall output level.
Figure 1-9 5.1-Channel Loudness Processor with Example Sources
Tone Generators. The 9985 contains eight built-in tone generators of
frequencies from 50 Hz to 16 kHz. Each of the eight tone generators can be
routed to the upmixer or directly to card audio outputs.
(Default output is -20 dBFS.)
DashBoard Dual Audio Loudness Meter Description
Note: This function provides DashBoard loudness metering and is furnished stan-
dard with the card. OGCP-9000 Loudness Meter Option (+LM) is an
OGCP-9000 Control Panel option that provides advanced loudness metering
functions such as graphing and statistics. +LM option is separate and inde-
pendent of this function; refer to catalog or website for more information.
This function allows two independent 5.1-channel PCM groups to be routed
to two independent DashBoard loudness meters that provide short-term
loudness measurement in accordance with ITU-R BS.1770-1 – ATSC A/85.
The function can monitor any combination of channels on the card internal
bus, or audio DSP output channels such as upmixed and loudness-processed
channels (channel routing to the meters is independent of any other card
routing and does not affect the channels in any way). The two loudness meters
readily allow pre and post-processed loudness processing comparison when
loudness processing is being performed by the card.
The function provides a configurable short term window for tailoring the
measurement to suit various program material conditions.
Bus Ch 1– Ch 6
> From Internal Bus
Bus Ch 1
Bus Ch 3
Bus Ch 4
Bus Ch 5
Bus Ch 6
L
R
(C)
(LFE)
(Ls)
(Rs)
To Output Audio
Routing/Controls
Loudness
Processing
Loudness processor provides loudness-processed outputs LP51 - L thru LP51 - Rs,
which are available as source selections for card audio output routing.
Processing
Preset
Select
Master
Output
Gain
Control
L
R
(C)
(LFE)
(Ls)
(Rs)
Input/Output
Select
Bus Ch 2
LP51-L
LP51-C
LP51-LFE
LP51-Ls
LP51-Rs
LP51-R