Grass Valley M-2100 - Manual (Page 59)

MMCP Installation/Operation Manual 2-35
Keyer Controls and Operation
Using SqueezeBack and Crop
SqueezeBack and Crop are special key-type effects used in the television
broadcast industry. Broadcasters typically use SqueezeBack/Crop effects
to issue sports scores or current weather conditions on-air without inter-
rupting the current on-air programming. In general, the SqueezeBack func-
tion acts like a keyer. The SqueezeBack effect can be cut on/off-air, just like
a key.
SqueezeBack squeezes the foreground and opens up a background area for
other program material (
Figure 2-12 ). Crop cuts a portion of the foreground
image, exposing the background. The background material for both Squee-
zeBack and Crop comes from a separate SqueezeBack Background input
BNC on the rear of the SD and HD processing frames.
Note The Standard Definition system can crop only from the bottom portion of the
image.
To use the SqueezeBack function, the software enabled option must be pur-
chased and enabled. You must also have an input signal connected to the
SqueezeBack input on the rear of the processor frame.
Figure 2-12. SqueezeBack Parameters Definitions
Defining SqueezeBack and Crop Effects
You can use the factory-built SqueezeBack effects, or the SqueezeBack
effects that have been previously programmed by your system engineering
staff. SqueezeBack parameters are configured in the Configuration
Manager
MCP form under the Sqeezeback Parameters tab. Refer to the Instal-
lation and Service Manual.
The entire television viewing area
The squeezed
Horiz.Start %
Vert.Start %
Vert.Size %
Horiz.Size %
The background
f oreground