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Section 1 — System Overview
Functional Description
Overview
Figure 1-6 shows the video flow in a typical Model 3000 switching
system.
Video and key signals enter the Input Section of the Model 3000,
which consists of analog, parallel digital, and/or serial digital
modules. The analog signals are converted to digital format, and
all inputs are timed and conditioned.
The digital signals are then passed to the Video and Effects Section
where keying and mixing take place. This section also provides
effect modifications, such as wipes, that can be applied to selected
inputs.
In the Output Section, digital video and key signals are converted
to any desired composite format (analog, parallel digital, or serial
digital), as predetermined by the type of output modules
installed, before leaving the Signal Processor.
Video Processing
Input video and key signal selections are made by the Crosspoint
Matrix under control of the system Controller, according to
operator assignments entered via the Control Panel.
In addition to primary (external) video, secondary (internal)
sources such as Masks, M/E re-entry video, and optional Frame
Store are available as inputs to the crosspoint matrix.
Two sets of RGB signals may be applied per optional Dual RGB
input module. These inputs are forwarded to a Dual Chroma
Keyer module.
Keyers in each Mix/Effects bank provide outputs to the Effects
Loop crosspoints for sending outside the switcher for external
processing or for routing to the M/E mixers and wipe generators.