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66 InFocus Corporation — Introduction Guide - DLP Multimedia Projector
Term Description
VGA out A 15-pin D-sub output on the projector that allows you to connect additional monitors or projectors
to display the same image. Also known as monitor loop-through or RGB out.
Video Mirroring An output connector on the projector that allows a monitor or another projector to share the same
video source.
Volt A measurement of electrical pressure.
Watt A unit of power. Volts multiplied by amperage equals watts.
White Level The signal level that corresponds to the maximum picture brightness. The white level is set by the
contrast control.
Wi-Fi

Wi-Fi

is Wireless Fidelity, and is a type of wireless network used to connect digital devices without
the need for cables. It is mostly used for wireless broadband access and inexpensive consumer
wireless antennas are available at electronics stores.
Widescreen Any aspect ratio that is wider than 4:3. Widescreen televisions are 16 units wide and 9 units tall.
Common widescreen film aspect ratios are 1.66:1, 1.85:1 and 2:35:1.
WMA Windows Media Audio. Similar to MP3 but considered a more efficient compressor allowing for
smaller file sizes for a given quality.
WSXGA WSXGA defines a class of SXGA displays with a width resolution sufficient to create an aspect ratio
of 16:9. A WSXGA display has 1920 to 1600 pixels horizontally and 1080 to 900 pixels vertically.
WXGA WXGA defines a class of XGA displays with a width resolution sufficient to create an aspect ratio of
16:9. A WXGA display has 1366 to 1280 pixels horizontally and 768 to 720 pixels vertically.
XGA XGA is a display resolution measuring 1024 pixels horizontally and 768 pixels vertically giving a total
display resolution of 786,432 individual pixels. XGA has a 4:3 aspect ratio.
XLR Balanced connection for audio components and used professionally.
XviD A free and open source MPEG-4 video codec that was created by a group of volunteer programmers
trying to overcome the closed source and platform limitations of DivX (XviD spelled backwards).
Y/C Denotes a separated luminance/chrominance signal. Also called S-video. Offers higher resolutions
and no cross interference between colour and black and white (luminance) signals which shows
itself as dot crawl.
Y/Cb/Cr Digital component video. Y stands for the luma signal itself and Cb is the blue signal subtracted from
luma and finally, Cr equals the red signal subtracted from the luma signal.
Y/Pb/Pr Analog component video. Y stands for the luma signal itself and Pb is the blue signal subtracted from
luma and finally, Pr equals the red signal subtracted from the luma signal.
Zoom Lens A lens with a variable focal length providing the ability to adjust the size of a projected image without
moving the projector or provide a range of projector placements that can produce the same size
image. See Zoom Ratio.
Zoom Ratio Zoom ratio is the ratio between the smallest and largest image a lens can projector from a fixed
distance. For example, a 1.4:1 zoom lens ratio means that a 10 foot image without zoom would be a
14 foot image with full zoom. Conversely, a 10 foot diagonal image at 15 feet with no zoom would still
be a 10 image at 21 feet at maximum zoom (15 x 1.4 = 21 feet). A zoom lens is "not as bright" as a fixed
lens, and the higher the ratio, the less light output.
Glossary