Epson EMP-30, User Manual

Page: 62 / 68

Glossary
60
sRGB
An international standard for colour intervals that was formulated so that colours which
are reproduced by video equipment can be handled easily by computer operating systems
(OS) and the Internet.
SVGA A type of video signal with a resolution of 800 (horizontal) x 600 (vertical) dots which is
used by IBM PC/AT-compatible computers.
S-Video
A video signal which has the luminance component and colour component separated in
order to provide better image quality.
It refers to images which consist of two independent signals: Y (luminance signal), and C
(colour signal).
Sync.
(Synchronisation)
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 "synchronisation". 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 video signal with a resolution of 640 (horizontal) x 480 (vertical) dots which is
used by IBM PC/AT-compatible computers.
XGA A type of video signal with a resolution of 1024 (horizontal) x 768 (vertical) dots which
is used by IBM PC/AT-compatible computers.
YCbCr
The carrier signal which is contained in the colour bar signal used in modern TV
transmissions. The name comes from the Y (luminance) signal and the CbCr (chroma
(colour)) signals.
YPbPr The carrier signal which is contained in the colour bar signal used in high-definition TV
(HDTV) transmissions. The name comes from the Y (luminance) signal and the PbPr
(colour difference) signals.