Epson ELPLP29 User Manual download pdf (Page 64)

Glossary

Complex terms used in this book, or terms not explained in the body of

the text, will be briefly explained here. For further explanation, please

consult commercially available reference texts.

5BNC A type of connector used to input analog video

signals.

Aspect ratio The ratio between an image's length and its height.

Images which have an aspect ratio of 16:9 are called

Widescreen. The aspect ratio for standard images is

4:3.

Color

Temperature

The temperature of an object which is emitting light.

When the colour temperature is high, colours tend to

take on a bluish tinge; when the colour temperature

is low, colours tend to take on a reddish tinge.

Component

Video

A type of video signal which has the video

brightness and colour signal information 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 (colour difference signals).

Composite Video The standard home video signal (NTSC, PAL,

SECAM) which has the video brightness and colour

signal information mixed together. Composite video

consists of the carrier signal Y (luminance signal)

and the chroma (colour) signal, combined within the

colour 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, or appear softer.

Adjusting this particular property of an image is

called "contrast adjustment".

Cool-down The process used to cool down a projector lamp that

is hot from use. Cool-down happens automatically

when the [Power] button is pressed on the projector

or on the remote control to turn the projector off. Do

not unplug the projector power cable whilst it is

cooling down. If cool-down is interrupted, heat from

the lamp gets trapped inside the projector, potentially

shortening the life of the lamp and causing projector

failure.

Dolby

digital

An audio format developed by Dolby Laboratories.

Normal stereo is a 2-channel format which uses two

speakers, whereas Dolby Digital is a 6-channel (5.1-

channel) system which adds a centre speaker, two

rear speakers and a sub-woofer.

HDTV An abbreviation for High-Definition Television, it

refers to high definition systems which satisfy the

following conditions.

• Vertical resolution of 750p or 1125i or greater

(p=Progressive scanningg, i=Interlaced scanningg)

• Screen aspect ratio of 16:9

• Dolby digitalgl audio reception and playback (or

output)

Interlaced

scanning

Each screen is divided into fine horizontal lines

which are displayed in sequence starting from left to

right and then from top to bottom. This method of

image scanning, whereby even numbered lines and

odd numbered lines are displayed alternately, is

called Interlaced scanning.

Progressive

scanning

A method of image scanning whereby the image data

from a single image is scanned sequentially from top

to bottom to create a single image.

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Epson ELPLP29 User Manual Page 64

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