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Digital Projection INSIGHT 4K Dual LED & Quad Series
APPENDIX E: GLOSSARY OF TERMS
Primary colors
Notes
Three colors any two of which cannot be mixed to produce the third. In additive color television systems the primary colors are red, green and
blue.
Progressive scanning
A method of updating the image in which the lines of each
frame
are drawn in a sequence, without interlacing.
Pulldown
The process of converting a 24 fps film footage to a video
frame rate
(25 fps for PAL/SECAM, 30 fps for NTSC) by adding extra frames. DP
projectors automatically carry out reverse pulldown whenever possible.
Resolution
The number of
pixels
in an image, usually represented by the number of pixels per line and the number of lines (for example, 1920 x 1200).
Scope
An
aspect ratio
of 2.35:1.
Synchronization
A timing signal used to coordinate an action.
Test pattern
A still image specially prepared for testing a projection system. It may contain various combinations of colors, lines and geometric shapes.
Throw distance
The distance between the screen and the projector.
Throw ratio
The ratio of the
throw distance
to the screen width.
Reference Guide
Rev B June 2016
page 71
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