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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.
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).
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 the projector off. 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 30 seconds. 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.
HDMI An abbreviation for High Definition Multimedia Interface, and refers to a standard for digital
transmission of high-definition images and multi-channel audio signals.
HDMI is a standard that is targeted towards household digital equipment and computers that allows
digital signals to be transmitted in their original high quality without compression, and it also includes
a digital signal encryption function.
HDTV An abbreviation for High-Definition Television. It refers to high-definition systems which satisfy the
following conditions.
•
••
•
Vertical resolution of 720p or 1080i or greater
(p = progressive, i = interlaced
)
•
••
•
Screen aspect of 16:9
•
••
•
Dolby Digital audio reception and playback (or output)
Interlace 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.
NTSC An abbreviation for National Television Standards Committee, and a format for ground-based analogue
color television broadcasts. This format is used in North America, Japan, and Central and South
America.
PAL An abbreviation for Phase Alternation by Line, and a format for ground-based analogue color
television broadcasts. This format is used in Western European countries except France, and also in
Asian countries such as China and in Africa.
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 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 HDTV
.
SECAM An abbreviation for Sequential Couleur A Memoire, and a format for ground-based analogue color
television broadcasts. This format is used in France, Eastern Europe and the former Soviet Union, the
Middle East and Africa.
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) × 600 (vertical) dots which is used by IBM
PC/ AT-compatible computers.