Tektronix AVG1 User Manual page 141

Glossary
AVG1 Analog Video Generator User Manual
APH
Active Picture Height.
Black Burst
Also called "color black," black burst is a composite video signal consisting
of all horizontal and vertical synchronization information and burst.
Typically used as the house reference synchronization signal in television
facilities.
Burst
A small reference packet of the subcarrier sine wave sent on every line of
composite video. Since the carrier is suppressed, this phase and frequency
reference is required for synchronous demodulation of the color difference
signals in the receiver.
B-Y
One of the color difference signals used in the NTSC and PAL systems,
obtained by subtracting luminance (Y) from the blue camera signal (B).
Chrominance
Chrominance refers to the color information in a television picture.
Chrominance can be further broken down into two properties of color: hue
and saturation.
Chrominance Signal
The high-frequency portion of the video signal, obtained by quadrature
amplitude modulation of a 4.43 MHz (PAL) or 3.58 MHz (NTSC) subcarrier
with R-Y and B-Y information.
Composite Video
A single video signal containing all of the necessary information to
reproduce a color picture. Created by adding quadrature amplitude modu-
lated U and V to the luminance signal.
Frame
A frame (sometimes called a "picture") contains all the information required
for a complete picture. For interlaced scan systems, there are two fields in a
frame.
GBR
Green, Blue and Red. The three primary colors used in color television's
additive color reproduction system. These are the three color components
generated by the camera and used by the picture monitor to produce a
picture.
Glossary- 1