Table of Contents
Advertisement
SECAM
An abbreviation for Sequential Couleur A Memoire, and a
format for ground-based analogue colour television
broadcasts. This format is used in France, Eastern Europe
and the former Soviet Union, the Middle East and Africa.
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.
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.
Sync. (Synchronization)
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.
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.
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.
YCbCr
The carrier signal which is contained in the color bar signal
used in modern TV transmissions. 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.
Glossary
47
Advertisement
Table of Contents
