Glossary - Epson EMP-TW100 User Manual

Glossary

Following is an explanation of some of the terms used in this guide which may be unfamiliar or which were
not explained in the manual itself. Further information can be obtained by referring to other commercially-
available publications.
3-2 pull-down
function
Aspect ratio
Black & white
extension function
Color
difference
signal
(component)
Color
temperature
Component video
Composite video
Contrast
Cool-down
DCDi function
DFP
Dolby Digital
DVI
Film judgment
function
Gain
Gamma
This function directly converts image sources that have been recorded in the same 24-frame
format used for movies into 60-frame progressive signals. This allows data such as DVD
software that has been recorded in 24-frame format to be played back on large screens with
more natural and accurate reproduction, without any loss of image quality from the original
movie.
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.
A function that accentuates differences in color gradations (darkness an lightness of colors)
even for images that are very dark or very bright, to make them easier to view.
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).
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.
Video signals which have the video brightness signals and color signals separated, in order to
provide better image quality.
In high-definition TV (HDTV), it refers to images which consist of three independent signals:
Y (luminance signal), and Pb and Pr (color difference signals).
Video signals which have the video brightness signals and color signals mixed together. The
type of signals commonly used by household video equipment (NTSC format).
The signals consist of the carrier signal Y (luminance signal) and the chroma (color) signal
which are contained in the color bar signal.
The relative brightness of the light and dark areas of an image can be increased or decreased
in order to make text and graphics stand out more clearly, or to make them appear softer.
The cooling process for the projector lamp continues even after the [Power] button on either
the remote control or the projector's control panel has been pressed to turn off the projector.
All button operations for the emote control and the projector's control panel are disabled
while the cooling fan is operating at this time. The length of time that this is happening is
called the "cool-down period". The cool-down period lasts for about 2 minutes. The actual
time will vary depending on the external air temperature.
An abbreviation for Directional Correlational Deinterlacing. Refers to a high-resolution
image circuit function developed by Faroudja. It incorporates the latest in edge cutting
technology to smooth the jaggedness from the edges of images that have been converted from
interlaced to progressive video, in order to provide more natural images.
Abbreviation for Digital Flat Panel. Refers to a standard method for digital transmission of
video signals.
A proprietary sound format developed by Dolby Laboratories. Normal stereo is a 2-channel
format that uses two speakers. Dolby Digital is a 6-channel (5.1 channel) format that adds to
this a center speaker, two rear speakers and a sub-woofer.
Abbreviation for Digital Visual Interface. Refers to a standard method for digital transmission
of video signals.
DVI is a standard which has also been applied to digital household electronic equipment other
than computers. It allows images to be transmitted at higher resolutions than for DFP.
This function determines whether or not the video source is a 24 Hz progressive film source.
The adjustment of minute changes in color that occur as result of factors such as differences
in the equipment used to display images. It adjusts the coloration in brighter ranges separately
for R, G and B components.
The adjustment of minute changes in color that occur as result of factors such as differences
in the equipment used to display images. It adjusts the coloration in intermediate ranges
separately for R, G and B components.
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