3-25
Switcher Module Description
Analog Chroma Key Input Module (064817) (Slot C8) The Analog Chroma Key input Module allows up to two component
analog inputs to be used as chroma keys. The inputs are converted to full
bandwidth digital video and are sent to both of the chroma keyers. The
analog input formats that are supported are:
■RGB
■SIMPTE
■BETA
■MII
■EBU
Mix/Wipe Module (064803) A Mix/Wipe Module is provided for each of the two M/Es, (two total). The
Mix/Wipe Module uses the video signals, key signals and the wipe control
signals to create a video output with all the requested elements. The Mix/
Wipe Module accomplishes the following:
■Combines video signals, key signals, and the wipe solid signal to create
the program video
■Interfaces to the Wipe Mezzanine Modules (one standard, one
optional)
■Does preview processing for that M/E
■Converts output video from parallel to serial
The Mix/Wipe circuit board has connectors for two Wipe Mezzanine
Modules and one Preview Module.
The Mix/Wipe Module has its own microprocessor, program memory
(flash PROM), and dual port memory. The system processor sends
information to the dual port memory indicating what is to be done during
the next field. The Mix/Wipe processor reads this information and does the
calculations necessary to accomplish the operations and sends the
information to the rest of the module and the mezzanine modules.
The Mix/Wipe Module routes the output of each Wipe Mezzanine into the
other Wipe Mezzanine. This allows the mezzanine modules to do a mix or
a NAM (Non Additive Mix) between the outputs of the two mezzanine
modules. See Figure 3-6 for mezzanine module locations.