Appendix F: Glossary of terms
Digital Projection E-Vision 4000 Series
Lumen
A photometric unit of radiant power. For projectors, it is normally used to specify the total amount of emitted visible light.
Luminance
Also known as ‘Y’, this is the part of a Component Video signal which affects the brightness, i.e. the black and white part.
N
Noise
Electrical interference displayed on the screen.
NTSC (National Television Standards Committee)
The United States standard for television - 525 lines transmitted at 60 interlaced fields per second
O
OSD (on-screen display)
The projector menus allowing you to adjust various settings.
Overlapping region
The area of the image that is to overlap with another image in an edge blend setup. Sometimes called overlapping region.
P
PAL (Phase Alternate Line)
The television system used in the UK, Australia and other countries - 625 lines transmitted at 50 interlaced fields per second.
Pillarboxing
Black margins at the left and right of the image. Pillarboxing appears when a narrower image is packed into a wider frame without changing the aspect
ratio.
Pixel
Short for Picture Element. The most basic unit of an image. Pixels are arranged in lines and columns. Each pixel corresponds to a micromirror within the
DMD™; resolutions reflect the number of pixels per line by the number of lines. For example, a 1080p projector contains 1080 lines, each consisting of
1920 pixels.
Pond of mirrors
Area around the periphery of the DMD™ containing inactive mirrors. The pond of mirrors may cause artifacts, for example during the edge blending
process.
Reference Guide
Rev A December 2021
page 79
Notes
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