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BBG-1034-AUD-PRO Functional Description
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BBG-1034-AUD-PRO PRODUCT MANUAL
BBG-1034-AUDPRO-OM (V1.1)
An Input Audio Status display shows the presence and peak level of each
input audio channel received by the device. 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.
Figure 1-4 Basic Audio Processing Block Diagram
Clean and Quiet Switching option
+CQS
allows SDI input
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.
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Video De-Embed)
AES
Rx/SRC
Input Routing
Internal
Bus
Routing/Gain/
Mute/Invert
Controls
Analog
Audio
ADC
Audio
Meters
AES IN
AN-AUD
IN
Audio
Delay
Offset
Control
Internal Bus Controls
Ref
Dolby E
Alignment
Control
Output Routing
Routing/Gain/
Mute/Invert
Controls
Audio
Meters
AES
Tx
Analog
Audio
DAC
AES OUT
AN-AUD
OUT
Embed 1-16
(to Program Video
Embed)
9902AUD V1.0LB89
Downmix