Miranda NV5100MC Master Control, Справочное руководство

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NV5100MC Master Control • Reference Man ual 69
4. MCPMs
MCPM Architecture
size or vice versa — in the transition period. The scaling rate is not constant, however, but
“S-shaped.” The scaling starts slow, gets faster, and slows down at the end of the period.
Enhanced Squeezeback
Enhanced squeezeback is basic squeezeback with an additional video input and its audio (selected
from the
main sources ) that can be scaled and placed on program output.
The additional squeeze image can be placed in the program output 3 ways:
• Under the first squeeze background. (It will be invisible although its audio might be audible.)
• Under the primary squeeze image (partially obscured by the primary squeeze image).
• Over the primary squeeze image (partially obscuring the primary squeeze image).
Enhanced squeezeback also allows the main source’s audio (possibly Dolby E encoded) to be asso-
ciated with the squeeze function. The operator (or automation) may select the audio as a special
audio over on one of the audio over buttons. The MCPM configuration software supports these
enhanced squeeze parameters:
• Squeezeback audio level (as a percentage).
• Which over button(s) can be used for enhanced squeezeback.
• Opacity, position, and size of the secondary image. The minimum size is 30%.
S
The secondary image follows the squeeze or crop behavior of the primary image.
S
The secondary image cuts on or cuts off. It does not shrink or grow as does the primary image.
S
The secondary image can also have borders as does the primary image.
Squeeze Borders
Squeeze effects allow borders. Although squeezed images cannot be clipped to the video frame,
borders are clipped.
Border thickness can be adjusted from 0.0% to 5.0% of the screen size, relative to the height of the
screen. The border thickness is always the same on all four sides of the squeezed image.
A border thickness of 2% uses 9.6 (i.e., 10) pixels on a 480-line image. Horizontally, the border
would also be 10 pixels).
Border color is a configurable parameter.
Squeeze Transitions
There are 4 squeezeback transition types, similar to, but not quite the same as, the basic transition
types for effects:
1 Cut On — scales the image to final (reduced) size in 2 frames.
2 Cut Off — scales the image back to full size in 2 frames.
3 Mix On — scales the image to final (reduced) size over the full transition period.
4 Mix Off — scales the image back to full size over the full transition period.
(Squeeze changes occur at the switch point of vertical blanking.) Opacity is not involved.
FTB Transitions
FTB stands for “fade to black/silence.” The fade actually transitions to the defined matte color,
which is not necessarily black. Audio also fades to silence. The FTB transition rate is independent
of the preset/program transition rate.