GRASS VALLEY 1200, Installation And Service

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3-29
Frame Modules
Key and Depth Output Processing
The Clean Key and the DSK Key (Figure 3-15) are converted from control
level signals to video level signals in the mixers. The selectors will allow
either of the key and depth inputs to be put on either or both of the key
outputs. The encoder multiplexes the key and depth signals into one signal.
Figure 3-15. Key and Depth Output Processing
MIXER
MIXER
KEY A
SELECT
KEY B
SELECT
D1
ENCODER
TX
RECLOCK
DEPTH
A
SELECT
DEPTH
B
SELECT
D1
ENCODER
TX
RECLOCK
Clean
Key
CPU
Data
DSK
Key
Clean
Depth
DSK
Depth
Key Sel A
Key Sel B
Key Sel A
Key Sel B
Key Out A
Key Out B