Cobalt Digital Inc 9902-2UDX Product Manual page 16

1
De-Embed IN 1-16
(from Program
Video De-Embed)
AES
AES IN
Rx/SRC
Analog
AN-AUD
Audio
IN
ADC
Figure 1-4 Audio Down Mix Functional Block Diagram with Example Sources
1-12
An Input Audio Status display shows the presence and peak level of each
input audio channel received by the card. In addition to SDI embedded audio
channel sources, analog and coaxial AES inputs are available as input audio
choices. For AES audio inputs, payload is identified (PCM or data such as
®
Dolby Digital or E). Each AES input pair has independent sample rate
converters to align each input pair with video timing to accommodate cases
where AES audio is not synchronous with input video (SRC automatically
bypassed for non-PCM payloads). As such, the audio subsection provides a
full crosspoint between all supported audio inputs and output types.
The audio output crosspoint for each path's embedded output allows
embedded channel selection from the respective path's own channels, or
channels from the alternate processing path.
Input Routing
Routing/Gain/
Internal
Mute/Invert
Bus
Controls
Audio
Meters
Figure 1-3 Basic Audio Processing Block Diagram
Audio Down Mix Function
(See Figure 1-4.) The Audio Down Mixer function provides for the selection
of any five embedded channels serving as Left (
Surround (
into stereo pair Down Mix Left (
resulting stereo pair
audio pair as desired (or de-embedded to an AES or analog audio output).
Emb Ch 1
Emb Ch 2
Emb Ch 3
Emb Ch 5
Emb Ch 6
9902-2UDX PRODUCT MANUAL
Internal Bus Controls
Audio Dolby E
Alignment
Delay
Control
Offset
Control
Ref
), and Right Surround (
Ls
DM-L
and
DM-L DM-R
Embed Ch 1 - Ch 16
L
DM-L
R
C
DM-R
Ls
Rs
9902-2UDX Functional Description
Output Routing
Embed 1-16
(to Program Video
Embed)
Routing/Gain/
Mute/Invert
Controls
AES
Tx
Audio
Meters
Downmix
Analog
Audio
DAC
), Right ( ), Center (
L R
) individual signals to be multiplexed
Rs
) and Down Mix Right (
can in turn be routed to any embedded
AES OUT
AN-AUD
OUT
9902AUD V1.0LB89
), Left
C
). The
DM-R
9902-2UDX-OM (V1.0)