Cobalt Digital Inc 9934-AUD-PRO Product Manual page 17

Introduction
De-Embed IN 1-16
Input Routing
(from Program
Video De-Embed)
AES
AES IN
Rx/SRC
Analog
AN-AUD
Audio
IN
ADC
9934-AUDPRO-OM (V1.1)
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.
Routing/Gain/
Internal
Mute/Invert
Bus
Controls
Audio
Meters
Figure 1-4 Basic Audio Processing Block Diagram
selection to be changed from one source to another while ducking audio
during controlled input video switching transitions to provide silence between
input switches. The cross-fade is queued for the next available RP168 switch
line following the switch command.
Note: • Clean audio switching is assured only for intentional, controlled switches via
user control. Clean audio switching cannot be assured for failover switches.
• Clean switching requires that both SDI signals (switch from and switch to)
be stable and present, and of the same SDI format and rate.
• Clean audio switching function is designed for PCM audio. This function
does not assure clean decoded audio when switching from/to Dolby or other
non-PCM audio.
1. Discrete audio I/O channel count is dependent on rear I/O module used. Not all rear I/O modules
may not support maximum number of available discrete channels.
9934-AUD-PRO PRODUCT MANUAL
9934-AUD-PRO Functional Description
Internal Bus Controls
Dolby E
Audio
Delay Alignment
Control
Offset
Control
Ref
Clean and Quiet Switching option
Output Routing
Embed 1-16
(to Program Video
Embed)
Routing/Gain/
Mute/Invert
Controls
AES
Tx
Audio
Meters
Downmix
Analog
Audio
DAC
allows SDI input
+CQS
AES OUT
AN-AUD
OUT
9902AUD V1.0LB89
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