Epson EMP-TW100 Installation Guide download pdf (Page 62)

Glossary

HDTV An abbreviation for High-Definition Television. It refers to high-definition systems which

satisfy the following conditions.

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Vertical resolution of 750p or 1125i or greater

(p = progressive scanning, i = interlaced scanning)

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Screen aspect ratio of 16:9

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Dolby Digital audio reception and playback (or output)

Interlaced A method of image scanning whereby the signal bandwidth used is approximately half that

required for sequential scanning when images with the same still picture resolution are

broadcast.

Offset 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 darker ranges separately

for R, G and B components.

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

extremely short time. Because of this, 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).

S-Video images A video signal which has the luminance component and color component separated in order

to provide better image quality.

It refers to images which consist of two independent signals: Y (luminance signal), and C

(color signal).

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 protector 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.

sRGB An international standard for color intervals that was formulated so that colors which are

reproduced by video equipment can be handled easily by computer operating systems (OS)

and the Internet.

SVGA A type of image signal with a resolution of 800 (horizontal) x 600 (vertical) dots which is

used by IBM PC/AT-compatible computers (DOS/V computers).

SXGA A type of image signal with a resolution of 1280 (horizontal) x 1024 (vertical) dots which is

used by IBM PC/AT-compatible computers (DOS/V computers).

Synchronization

(Sync.)

The signals output from computers have a specific frequency. If the projector frequency does

not match this frequency, the resulting images will not be of a good quality. The process of

matching the phases of these signals (the relative position of the crests and troughs in the

signal) is called "synchronization". If the signals are not synchronized, problems such as

flickering, blurriness and horizontal interference can occur.

Tracking The signals output from computers have a specific frequency. If the projector frequency does

not match this frequency, the resulting images will not be of a good quality. The process of

matching the frequency of these signals (the number of crests in the signal) is called

“tracking”. If tracking is not carried out correctly, wide vertical stripes will appear in the

projected images.

Three-dimensional

Y/C separation

A term given to the reduction in fine image distortion such as stripiness and jaggedness of

image contours that can occur as a result of separate digital processing of Y (luminance) and

C (chroma) components of image signals.

UXGA A type of image signal with a resolution of 1600 (horizontal) x 1200 (vertical) dots which is

used by IBM PC/AT-compatible computers (DOS/V computers).

VGA A type of image signal with a resolution of 640 (horizontal) x 480 (vertical) dots which is

used by IBM PC/AT-compatible computers (DOS/V computers).

XGA A type of image signal with a resolution of 1,024 (horizontal) x 768 (vertical) dots which is

used by IBM PC/AT-compatible computers (DOS/V computers).

YCbCr The carrier signal which is contained in the color bar signal used in modern TV transmissions

(NTSC format). The name comes from the Y (luminance) signal and the CbCr (chroma

[color]) signals.

YPbPr The carrier signal which is contained in the color bar signal used in high-definition TV

(HDTV) transmissions. The name comes from the Y (luminance) signal and the PbPr (color

difference) signals.

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Epson EMP-TW100 Installation Guide Page 62

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