Definition of Terms,
continued
Krell Showcase DVD
3
Video Technology
VIDEO SIGNAL
OPTIONS
BUILDING THE VIDEO
PICTURE
Video Signal
A signal which includes all the information present in the video pic-
ture. There are three basic elements in a video picture: color, bright-
ness, and synchronization data.
Chrominance (C or Chroma).
The color portion of a video
signal.
Luminance (Y, Brightness, or Luma).
The monochrome
portion of a video signal.
Component Video Signal (3 Signals)
Three separate signals transmit: luma (Y), blue minus luma (B-Y),
and red minus luma (R-Y), resulting in a high quality, film-like picture.
YPbPr (or PrPbY)
. One way to designate the three signals used
in component video. Y = the luma signal, Pb = the blue minus
luma (B-Y) chroma signal, and Pr = the red minus luma (R-Y)
chroma signal.
S-Video Signal (2 Signals)
Two separate signals transmit the luma (Y) and chroma (C). S-video
signals bypass television circuitry required by composite video, and
reduces video noise as well as cross-contamination of luma and
chroma signals.
Composite Video Signa
l (1 Signal)
One signal transmits luma (Y) chroma (color), and synchronization
data.
Interlaced (standard) signals
build the video picture in two passes.
Progressive signals
build the video picture in one pass. This tech-
nology eliminates motion artifacts and produces film-quality pictures.
Both the video source and television must be equipped with progres-
sive video connections.
