Bedienungsanleitung Epson emp tw10h lcd projector (Seite 26 von 100) (Englisch)

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24-Glossary

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.

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 scanning

g, i=Interlaced scanningg)

• Screen aspect ratio of 16:9

• Dolby digital

gl 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.

Refresh Rate The light-emitting element of a display maintains the same luminosity and colour for an

extremely short time. For this reason, the image must be scanned many times per second in

order to refresh the light-emitting element. The number of refresh operations per second is

called the "refresh rate", and is expressed in hertz (Hz).

RGB-Video A term used to describe a video signal most commonly output to computer monitors. RGB

video is made up of electrical pulses representing the intensities of the three primary colours

of light, red, green and blue. A fourth or fifth pulse carries timing information.

SCART A 21pin rectangular shaped connector for transmitting audio and video signals between TV,

VTR and AV equipment. RGB, S-Video/Composite video and two audio channels can be

transmitted.

SDTV An abbreviation for Standard Definition Television. It refers to standard television systems

which do not satisfy the conditions for High-Definition Television.

Security lock A device consisting of a projector case with a hole in it that a commercially-available theft-

prevention cable can be passed through in order to secure the device to a table or pillar. This

projector is compatible with the Microsaver Security System manufactured by Kensington.

Squeeze mode The method of compressing 16:9 Widescreen images and recording them on video software

as 4:3 images.

When projecting with Squeeze mode on, the images will return to their original 16:9 format.

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