Glossary

GLOSSARY
2:2 pull-down
Theprocess of transferring 24-frames/sec film format into video by repeating each frame (used for PAL DVD’s) as two video fields.
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3:2 pull-down
Method used to map the 24 fps of film onto the 30 fps (60 fields) or 25 fps (50 fields), so that one film frame occupies three video
fields, the next two, etc. It means the two fields of every other video frame come from different film frames making operations
such as rotoscoping impossible, and requiring care in editing. Some sophisticated equipment can unravel the 3:2 sequence to
allowframe-by-frame treatment and subsequently re-compose 3:2. The3:2 sequence repeats every five video frames and four film
frames, the latter identified as A-D. Only film frame A is fully on a video frame and so exists at one time code only,making it th e
editable point of the video sequence.
AGC
AutomaticGain Contro l: allows an automatic amplitude (gain) control of the incoming video signal
ANSI 73.11
Americanpow er plugto connect the power cord to the wall outlet.
Artefacts
Undesirable elements or defects in a video picture. These may occur naturally in the video process and must be eliminated in
orderto achieve a high-quality picture. Mostc ommon inanalog are crosscolor and cross luminance. Mostcommon in digital are
macroblocks, which resemble pixelationof the video image.
CEE7
European power plug to connectthe power cord to the wall outlet.
Chrominance
Thecolor co mponent of a video signal that includes information about tint and saturation.
Colorspace
Acolor space is a mathematical representation for a color. Forexample, the RGB color space is based on a Cartesian coordinate
system.
Common address
Defaultaddress. Projectorwill always execute the command coming from a RCU programmed with that common address.
Component Video
InComponent Video the term component describes a number (3) of elements that are needed to make up the video picture, these
componentsare R-Y/Y/B-Y. A composite video signal on the other hand contains all the information needed for the color picture in
a single channel of information
DMD
Digital Micromirror Device
DVI
DigitalVisual Interface is a display interface developed in response to the proliferation of digital flat panel displays.
Thedigital video connectivity standard that was developed by DDWG (Digital Display Work Group). Thisconnection standard offers
two different connectors: one with 24 pins that handles digital video signals only, and one with 29 pins that handles both digital
andanalog video. Thisstandard uses TMDS (Transition Minimized Differential Signal) from Silicon Image and DDC (Display Data
Channel) from VESA (Video Electronics Standards Association).
DVI can be single or dual link.
Luminance
The component of a videosignal that includes information about its brightness.
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