Abekas Dveous/MX-Key Signal Paths
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Note: In one channel HD mode the processing is the same as above just without the Video B
input.
Video+Key Mode
The Video+Key mode differs from the Video+Video mode
only in that the board processes the B input as the key signal, with additional
clip, gain and H phase adjustments. Note that the "chroma" part of the B cir-
cuitry is not used since key signals are monochrome.
The A/B Combiner's key output is a transformed version of the input, and not
the raster-based signal seen in the Video+Video mode. The B key transform is
independent of the A video transform.
Video A
Input
Texture A
Input
Texture B
Input
Texture A
Input
Luma
Luma
Luma
Luma
A Luma
B Luma
Chroma
Chroma
Chroma
Chroma
A Chroma
B Chroma
Input A
Light
Source
Combine
Input B
Light
Source
Combine
Light
Source
Generator
Light
Source
Generator
Xform
Ctl A
Xform
Ctl B
Proc &
Transform
Proc &
Transform
Proc &
Transform
Proc &
Transform
A Edge Key
B Edge Key
A/B
Combiner
Key
Processor
Graphics
Generator
Video
Out
Key
Out
Graphics
Out
