Projector Variables: Electronic And Anamorphic Resizing; Theatre Variables: Masking; Typical Method For Achieving “Scope”; Top Masking For Scope - Christie CP2000 User Manual

LIT MAN USR CP2000
020-100032-04 Rev. 1 (03/14)

Projector Variables: Electronic and Anamorphic Resizing

Because the native resolution/format of the CP projector closely matches the flat
aspect ratio (the native resolution being only slightly wider, at 1.89), the projector
can essentially show incoming "flat" images through its standard zoom lens. "Scope"
source material, however, is typically "squeezed" electronically—that is, it is
distorted into a narrow image (characterized by unusually thin people!), and then its
pixels are stretched horizontally through the anamorphic lens so that the full 2.39
image width appears on screen. The image becomes wider but not taller. See Figure 4.3.
Figure 4.3. Typical Method for Achieving "Scope"
If the incoming material has not been "pre-squeezed" by the distributor, you can
squeeze it by using a source file in which the combined settings for 1) incoming
source resolution and 2) desired aspect ratio define the necessary compression. The
incoming material will then be squeezed into a narrower area on the projector's DMD
panels, with the final aspect ratio setting determining the actual degree of
compression. See 3.5, Using the Touch Panel Controller for more information about
choosing Source menu settings.

Theatre Variables: Masking

In order to present either type of
feature on a single screen, a theatre
typically uses masking to conceal
any unused edge(s) of the screen.
These movable panels or curtains
are most commonly installed along
the top edge of the screen, changing
the height of the screen but not its
width. The screen shown in Figure
4.4 at right also has a bottom mask.
•
Add masks for "scope"
•
Open masks for "flat"
CINEMA OPERATION
Figure 4.4. Top Masking for Scope
4-3