This section explains easily terms that are used with the projector and difficult terms that are not explained in the text of this guide. For details, refer
to other commercially available publications.
Aspect Ratio
(Aspect Ratio)
The ratio between an image's length and its height. HDTV images have an aspect ratio of 16:9 and appear elongated. The aspect ratio for
standard images is 4:3.
Component Vide o A Video signal which has the luminance component and color component separated to provide better image quality.
Refers to images that consist of three independent signals: Y (luminance signal), Pb and Pr (color difference signals).
Composite video Video signals that 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). The carrier signal Y (luminance signal) and chroma (color) signal that are contained in the color
bar are overlapped to form a single signal.
Contrast The relative brightness of the light and dark areas of an image can be increased or decreased to make text and graphics stand out more clearly, or
to make them appear softer. Adjusting this particular property of an image is called Contrast adjustment.
Dolby Digital A sound format developed by Dolby Laboratories. Normal stereo is a 2-channel format that uses two speakers. Dolby Digital is a 6-channel
(5.1-channel) system which adds to this a center speaker, two rear speakers, and a sub-woofer.
HDCP An abbreviation of High-bandwidth Digital Content Protection, which refers to a copyright protection technology that prevents illegal copying
by encrypting the digital signals sent and received via HDMI port. Because the HDMI input port on this projector supports HDCP, it can project
digital images protected by HDCP technology, However, if the HDCP standard changes, it may not be possible to project digital images
protected by the changed standard.
HDTV An abbreviation for High-Definition Television that refers to high-definition systems which satisfy the following conditions.
•Vertical resolution of 720p or 1080i or greater (p = Progressive
g
, i = Interlace
g
)
•Screen Aspect Ratio
g
of 16:9
Interlace A method of image scanning whereby the image data is divided into fine horizontal lines that are displayed in sequence starting from left to right
and then from top to bottom. The even-numbered lines and odd-numbered lines are displayed alternately.
Progressive 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 color for an extremely short time. Because of this, the image must be
scanned many times per second to refresh the light-emitting element. The number of refresh operations per second is called the Refresh Rate
and is expressed in hertz (Hz).
SDTV An abbreviation for Standard Definition Television that refers to standard television systems which do not satisfy the conditions for HDTV
g
High-Definition Television.
sRGB An international standard for color intervals that was formulated so that colors that are reproduced by video equipment can be handled easily by
computer operating systems (OS) and the Internet. If the connected source has an sRGB mode, set both the projector and the connected signal
source to sRGB.
SVGA A type of video signal with a resolution of 800 (horizontal) ^ 600 (vertical) dots that is used by IBM PC/AT-compatible computers.
Glossary
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