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Glossary
This glossary provides brief explanations of terms which are used in this
manual but are not explained in the text or difficult to understand. For details,
refer to other available publications.
Term Description
A/V Mute Refers to temporary stoppage of audio and video. Your projector
provides this function when the A/V Mute button is pressed. When
the A/V Mute button is pressed again or audio volume is adjusted,
this function is released.
Aspect ratio The ratio between an image's length and its height. HDTV images
have an aspect ratio of 16:9 and appear elongated. The aspect ratio
for standard images is 4:3.
Color
difference
signal
(component)
A type of video signal output by video equipment which actually
consists of three separate signals: a red + luminance signal (R-Y), a
luminance signal (Y) and a blue + luminance signal (B-Y). Each
signal is transmitted along a separate cable. Color difference
signals generally result in a better image than composite signals (in
which the red, green and blue signals and the luminance signal are
all transmitted along a single cable).
Color
temperature
The temperature of an object which is emitting light. If the color
temperature is high, the colors tend to take on a bluish tinge. If the
color temperature is lower, the colors tend to take on a reddish tinge.
Contrast The enhancing or weakening of differences in color lightness and
darkness that provides a sharper or softer view of characters and
images. This adjustment is referred to as contrast adjustment.
Cool-Down After the Power button is pressed and the lamp goes out, lamp
cooling is continued. After the lamp goes out, a cooling fan spins,
and operational buttons become inactive.
Cool-down time takes about 2 minutes.
Gamma During image display, the difference of display colors depending on
the device used is compensated.
SVGA Refers to a 800-pixel (Pix) horizontal x 600-pixel (Pix) vertical
display signal for an IBM PC/AT-compatible (DOS/V) computer.
SXGA Refers to a 1280-pixel (Pix) horizontal x 1024-pixel (Pix) vertical
display signal for an IBM PC/AT-compatible (DOS/V) computer.
Sync
(synchronization)
Signals output by a computer are output at a certain predetermined
frequency.
If the frequency of your projector cannot match that frequency, a
clear image cannot be obtained. Matching of signal phases (peak
offset) is referred to as synchronization (synch).
If synchronization is not achieved, a projected image displays jitters,
blurring, and horizontal noise.
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