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BBG-1040-ACO Functional Description
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BBG-1040-ACO PRODUCT MANUAL
BBG1040ACO-OM (V1.4)
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 (
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.
Figure 1-4 Audio Down Mix Functional Block Diagram with Example Sources
Audio Silence Events Detect Function
An
Audio Silence Events
user interface and an
Event Triggers
user interface
provide for setting audio level screening and thresholds for audio silence
event alerts. When a silence events occur, the event(s) can be used by the
Presets function to invoke input routing or other changes.
An Audio Failover Threshold control allows setting the level at which
channel content is considered to be silent, and correspondingly also a
transition back to an untriggered condition with resumption of audio for the
selected embedded channels. Trigger holdoff sets the period of time in which
selected channel silence must occur before an Audio Silence Event trigger
goes true. Release holdoff sets the time in which the trigger is revoked upon
an event false condition. The
Event Triggers
user interface allows instructing
the device as to the action to take upon an event (such as go to a changed
signal routing, activate a GPO, send an automated email, or go to a
user-defined preset).
Alarm Function
The device can be set to monitor input video/audio for input errors such as
input LOS, frozen or black frame, loss of reference, closed captioning
ancillary data loss, and/or per-channel audio absences. These alarms can be
propagated as a card general error or warning message, and can be
downloaded as basic .txt logs or via a Syslog function.
User setup tables configure the alarm severity escalation as well as trigger
holdoff/release and other thresholds as applicable.
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