BBG-1034-AUDPRO-OM (V1.1)
BBG-1034-AUD-PRO PRODUCT MANUAL
1-7
Introduction
BBG-1034-AUD-PRO Functional Description
Video Processor Description
The BBG-1034-AUD-PRO video subsystem provides the functions described
below.
Input Video Select/Quality Check Functions
A GUI-based control allows the device to select from up to four 3G/HD/
SD-SDI inputs, and a SD CVBS analog video input. For analog inputs,
waveform-based ancillary data is preserved for extraction and usage later in
the device processing chain.
The input can be selected using DashBoard manual control, set to failover to
an alternate input upon loss of the target input, and can be externally selected
via a GPIO interface. An input
Allowed Rasters
and
Allowed Frame Rates
filter
allows inputs to be filtered (screened) for only user-allowed raster sizes and
frame rates, with unallowed raster/rates being rejected as an input (input
unlock). Reclocked copies of any SDI input can be outputted by the device
when selected as a choice on the output crosspoint.
(Option
+QC)
. Quality Check allows criteria such as black/
frozen frame events to propagate an event alert. This alert can be used by the
Presets function to invoke video routing changes, GPO, and other actions.
Auto-Changeover Function
(See Figure 1-2.) This function allows the device logic assert of input select
and routing to the
RLY BYP B
device processed output under normal
conditions, while providing latching relays at both the input and output nodes
to provide input failover to select an alternate input, and also provides output
failover which can passively relay-route the currently selected input directly
to the output if the device loses power or is removed from the frame.
The
RLY BYP B
SDI output retains selected routing regardless of whether a
selection was manually invoked or by a unit-detected failover (such as loss of
power). For example, prior to a power loss event if a changeover from
SDI IN A
to
SDI IN B
was active at the time, this selection is retained by the
latching relays. In a power-loss event,
SDI IN B
would be directly routed to
output
RLY BYP B
, and the device automatically removed from the signal path
until normal operation again commences. In normal operation, the output
relay always maintains routing from the device processed output to output
RLY BYP B
.
Note:
• The device also provides active (DA-driven) outputs
RCK/PROC 1
thru
RCK/PROC 4
. These outputs are independent of the relay failover function
and will lose signal in the event of a power loss.
• The above failover uses basic signal presence as failover criteria and is
limited to inputs A and B. Failover using active assessments (Quality
Check) can be set to provide failovers using frozen/black frame and other
criteria. See Video Quality Events Detect Function (p. 1-11) for more
information.