Cobalt Digital Inc BBG-1034-AUD-PRO, Руководство по эксплуатации продукта, Страница: 17 / 114

BBG-1034-AUDPRO-OM (V1.1) BBG-1034-AUD-PRO PRODUCT MANUAL
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Introduction
BBG-1034-AUD-PRO Functional Description
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 (
L
), Right (
R
), Center (
C
), Left
Surround (
Ls
), and Right Surround (
Rs
) individual signals to be multiplexed
into stereo pair Down Mix Left (
DM-L
) and Down Mix Right (
DM-R
). The
resulting stereo pair
DM-L
and
DM-R
can in turn be routed to any embedded
audio pair as desired (or de-embedded to an AES or analog audio output).
Figure 1-5 Audio Down Mix Functional Block Diagram with Example Sources
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 (
Flex Mix
Bus A
thru
Flex Mix Bus P
) can receive any device audio input, thereby
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
®
UPMAX™ automatic
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.
•
Input Mixer
path positioning locates the DSP pipeline to receive basic
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
DM-L
L
R
C
Ls
Rs
DM-R
Emb Ch 1
Emb Ch 2
Emb Ch 3
Emb Ch 5
Emb Ch 6
Embed Ch 1 - Ch 16