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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.
Aspect Ratio
The ratio between an image's length and its height. Wide
screen refers to screens such as those for HDTV where
the ratio between the width and the height is 16:9.
The aspect ratio for SDTV and general computer screens
is 4:3.
Component video
A method of separating images signals into luminance
(Y), blue color difference (Cb or Pb) and red color
difference (Cr or Pr) for video transmission.
Composite video
A video transmission method conveying luminance and
chrominance signals together in a single cable.
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
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 turn off the projector. Do not turn off
the main power switch 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 projector takes about 16 seconds to cool
down. The actual time will vary depending on the
external air temperature.
HDCP
An abbreviation for High-bandwidth Digital Content
Protection, which is a type of copyright protection
technology used for preventing unauthorized copying by
encoding digital signals which are transmitted and
received via DVI and HDMI ports. The HDMI input
terminals of this projector are HDCP compatible, so that
digital images which are protected by HDCP technology
can be projected. However, if changes are made to the
HDCP standard, it may no longer be possible to project
digital images which have been protected by the new,
changed standard.
HDMI
TM
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
TM
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 = interlace )
• Screen aspect
of 16:9
• Dolby Digital audio reception and playback (or output)
Interlace
Displays an image by transmitting scan data for every
other line from top to bottom. Because one frame is
displayed in every other line, flickering may easily
become visible.
NTSC
An abbreviation for National Television Standards
Committee, and a format for ground-based analogue
color television broadcasts. This format is used in Japan,
North America 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.
Progressive
Displays an image for one frame line by line from top to
bottom all at once. Even though the scanning lines are the
same as for interlace scanning, flickering is much less
visible in images because twice as much information
transmitted per unit time.
S-Video
A method of separating images signals into luminance
(Y) and chrominance (C) for video transmission.
SDTV
An abbreviation for Standard Definition Television. It
refers to standard television systems which do not satisfy
the conditions for HDTV.