Epson EMP-TW100 Installation Guide download pdf (Page 61)

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.

Black & white

extension function

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.

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.

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 format).

The signals consist of the carrier signal Y (luminance signal) and the chroma (color) signal

which are contained in the color bar signal.

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 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.

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.

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Epson EMP-TW100 Installation Guide Page 61

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