Cobalt Digital Inc BBG-1034-AUD-PRO Product Manual page 17

Introduction
Figure 1-5 Audio Down Mix Functional Block Diagram with Example Sources
BBG-1034-AUDPRO-OM (V1.1)
Audio Down Mix Function
(See Figure 1-5.) The Audio Down Mixer function provides for the selection
of any five embedded channels serving as Left (
Surround ( ), and Right Surround (
Ls
into stereo pair Down Mix Left (
resulting stereo pair
DM-L
audio pair as desired (or de-embedded to an AES or analog audio output).
Embed Ch 1 - Ch 16
Emb Ch 1 L
R
Emb Ch 2
C
Emb Ch 3
Emb Ch 5 Ls
Rs
Emb Ch 6
Flex Buses
For both input and output nodes before and after the internal buses, flex buses
provide flexible-structure mixer in which any of 16 summing nodes (
thru
Bus A Flex Mix Bus P
allowing several customizable mixing schemes. Similarly, any of the 16
internal bus signals can be applied to an output flex bus mixer.
Audio DSP Function
The Audio DSP Function provides a DSP-based platform that supports
multiple audio DSP options. When optioned with various diverse audio
processing options, the DSP-based processing core (which supports numerous
simultaneous processing engines) uses license "credits" which allows flexible
tailoring of multiple proc function instances. Audio proc options include
®
Dolby Real-Time Loudness Leveling automatic loudness processing,
®
Dolby D/D+ encode/decode, and Linear Acoustic
upmixing.
(See Figure 1-6) The Audio DSP block is positioned between all device audio
inputs (input mixer positioning) as well as audio outputs (output mixer
positioning). Actual audio DSP proc functions are facilitated using licenses
for these options. When any audio option is licensed (activated), the
processing can be positioned at the input or output mixer as desired.
path positioning locates the DSP pipeline to receive basic
Input Mixer
•
external inputs coming into the device, and then allows DSP
processed output channels to be directed to the internal Audio Bus
channels by selecting Audio DSP channels as sources for destination
Audio Bus channels via the Input Audio Routing/Controls
BBG-1034-AUD-PRO PRODUCT MANUAL
BBG-1034-AUD-PRO Functional Description
), Right (
L
) individual signals to be multiplexed
Rs
) and Down Mix Right (
DM-L
and can in turn be routed to any embedded
DM-R
DM-L
DM-R
) can receive any device audio input, thereby
), Center ( ), Left
R C
). The
DM-R
Flex Mix
®
UPMAX™ automatic
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