Epson PowerLite 30c User Manual page 62

Glossary
SVGA
S-Video
Sync.
(Synchronization)
Tracking
VGA
XGA
YCbCr
YPbPr
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A type of video signal with a resolution of 800 (horizontal) x 600 (vertical) dots that is
used by IBM PC/AT-compatible computers.
A video signal that has the luminance component and color component separated in
order to provide better image quality.
It refers to images that consist of two independent signals: Y (luminance signal), and C
(color signal).
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.
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 image.
A type of video signal with a resolution of 640 (horizontal) x 480 (vertical) dots that is
used by IBM PC/AT-compatible computers.
A type of video signal with a resolution of 1024 (horizontal) x 768 (vertical) dots that is
used by IBM PC/AT-compatible computers.
The carrier signal that 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.
The carrier signal that 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.