Accom ASWR8150, Техническое руководство

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in Figure 1-6. Dual patch mode discriminates and combines two phase
vectors; each patch has controls for adjusting the chroma key settings
precisely.
Luminance Key Extraction
Advanced clip and gain controls support fully linear luminance key
extraction. The
Low Clip and Low Gain pushknobs are like the Clip and
Gain controls in a traditional keyer, letting you change the key signal
low level clip point and slope. The
High Clip and High Gain pushknobs,
however, let you change the key signal high level clip point and slope.
Key Modifiers
Masking
The 8150 supports both internal and external masking. Internal box
mask controls include position, size, and rotation angle. You can select
external mask sources from the internal crosspoint matrix. You can use
the mask to hide parts of the key or to expose additional parts of the key.
Key Signal Transformations
Extracted key adjustments include size, position, and defocus in both
the horizontal and vertical dimensions.
Border Processing
Keys can have the following types of borders: full surround, outline
only, embossed, extruded, trailing, and drop shadow. You can soften
any border type. You can also soften extruded, trailing/decaying, and
drop shadow borders independently of the original key signal.
Color Matte Generators [5]
Three full field color matte generators can provide key matte, key
border, or wipe border fills. Two color matte generators are dedicated
to the Mix/Effects processor; one is dedicated to the PGM/PST/DSK
processor.
Super Matte Generator [6]
The SuperMatte generator can create three-color washes in a variety of
patterns, using a dedicated wipe pattern generator. The SuperMatte
generator feeds the internal crosspoint matrix for video source
assignment in the 8150.
Black Generator [7]
The black generator feeds the fade-to-black circuitry in the
PGM/PST/DSK processor, and the internal crosspoint matrix as system
black.
Video Processing Functional Description 8150 Technical Guide
1-14
Introduction
9100-0212-04 - May 2000