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Epson EMP-TW100 Seite 63

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Appendices
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
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.
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
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.
Component video 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).
Composite video Video signals which have the video brightness signals and color signals mixed together.
The type of signals commonly used by household video equipment (NTSC, PAL and
SECAM formats).
Video signals which consist of a carrier signal Y (luminance signal) within the color bar
signal, and a chroma or color signal (CbCr).
Contrast 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.
Cool-down This is the process by which the projector's lamp is cooled down after it has become hot
through use. It is carried out automatically when the [Power] button on either the remote
control or the projector's control panel has been pressed to turn off the projector. Do not
disconnect the power cord while cool-down is in progress, otherwise the cool-down process
will not work properly. If the cool-down period is not allowed to finish normally, the
projector's lamp and internal components will remain at high temperatures, and this may
shorten the useful life of the lamp or cause problems with the operation of the projector.
The cool-down period lasts for about 5 minutes. The actual time will vary depending on the
external air temperature.
DCDi function 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.
DFP Abbreviation for Digital Flat Panel. Refers to a standard method for digital transmission of
video signals.
Dolby Digital 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.
DVI 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.
Film judgment
function
This function determines whether or not the video source is a 24 Hz progressive film
source.
Gain 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.
Gamma 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.
… 63 …

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