Studio Technologies 5154 - Manual (Page 22)

Issue 3, September 2013 Model 5154 User Guide
Page 22 Studio Technologies, Inc.
Model 5154
Video Generator/Audio De-Embedder Module
Output Format and Rate
When a valid signal is connected to the
selected SDI input it will be routed to the
SDI output at the identical format and rate
of the source. When the SDI input is no
longer present the internally-generated
signal will become active and be routed to
the SDI output. The format and rate of the
internally-generated SDI signal will depend
on parameters that are stored within the
Model 5154. Whether these parameters
can change depends on the configuration
of the module’s SDI output image format/
rate mode. Typically, the mode will be set
for Auto Select which allows the Model
5154 to revise its parameters by following
the format and rate of the connected SDI
signal. This ensures that the Model 5154
can generate an SDI signal that matches
the requirements of a facility or event.
For the module to “learn” a new format
and rate simply requires the momentary
connection of an SDI signal that has the
desired format and rate. As long as the
signal is present on the selected SDI input
for a minimum of five seconds the Model
5154 will store the “new” format and rate
parameters in nonvolatile memory. The
module will then use those parameters
whenever the internal generator is active.
The only caveat for the module to “learn” a
new format/rate combination is that it must
be a compatible combination. Refer to the
Specifications section of this guide for a
complete list.
There are some applications that will bene-
fit from the internally-generated SDI output
signal always having a specific format and
rate. In this case the SDI output image
format/rate mode can be set for Locked.
No matter what the format and rate of
a connected SDI signal, the stored
parameters will not change. Changing
the stored parameters would require the
format/rate mode to be changed to Auto
Select, an SDI signal with the desired for-
mat and rate be connected for a minimum
of five seconds, and then the format/rate
mode changed back to Locked.
Moving Image Overlay
The Model 5154 has the ability to overlay
a moving image on top of the stored “720”
and “1080” images. A configuration setting
selects whether the moving image overlay
will be active. The moving image, a box
that’s red in color, slowly moves around
and on top of whatever stored image is
present on the SDI output. The color, size,
and rate of motion of the “box” are fixed in
the FPGA’s firmware (embedded software)
and can’t be altered.
The moving image is provided specifically
so that users who are “downstream” from
the Model 5154’s SDI output are assured
that the “720” or “1080” image they are
viewing is active. And, just to clarify, if
a signal is present on the Model 5154’s
selected SDI input it will be passed on to
the coaxial (BNC) and, if present, optical
SDI outputs. The moving image will never
overlay an input signal—it can only overlay
on top of the stored image.
Audio De-Embedding
The Model 5154 will de-embed two
audio groups from the connected SDI
input signal. These groups each consist
of two stereo audio pairs providing a total
of eight audio channels. Exactly how the
module de-embeds audio depends on
how the module has been configured.
There are eight configuration choices.