Appendix D
♦
Glossary
CMN-41 Series Installation and Operation Handbook
143
Copyright © 2009, Harris Corporation
Unity Gain
An electronic term indicating that a signal will be neither amplified or
attenuated. One volt of signal level in results in one volt of signal level out.
Vector
A measure that has two individual properties: magnitude and direction.
Vector Clip
A special encoded clip version that limits only the C
B
and C
R
input video
signals and does not affect (nor is it affected by) the luminance component. This
color-only clip limits the maximum vector excursions as viewed in an encoded state
and is intended for users who wish to prevent encoded vectors from ever exceeding the
perimeter circle of an encoded vector display.
VHF
Very High Frequency
VITC
Vertical Interval Time Code, a method for recording on to video tape the
timecode address for each video frame inserted in the vertical interval.
Video Payload ID
An ancillary data packet in a digital video interface for the
purpose of identifying the video payload. Formatted according to SMPTE 352M the
data includes the video format and interface transport, the picture rate and the picture
and transport scanning methods, the sampling structure, and extended aspects of the
video payload providing information about the channel assignment, dynamic range and
bit-depth of the video payload
.
Waveform
A visual representation of a signal in the shape of a wave that plots
amplitude versus time.
White Level
The brightest part of a video signal, corresponding to approximately 1.0
Volt.
White Balance
An electronic process used to calibrate the picture for accurate color
display in different lighting conditions.
Wipe
A special effect in which two pictures from different video sources are displayed
on one screen. Production switchers and special effects generators provide numerous
wipe patterns varying from simple horizontal and vertical wipes to multi-shaped, multi-
colored arrangements.
XGA
High resolution 1024×768 non-interlaced (progressive) display monitor
XVGA
Extended Video Graphics Adapter
YP
B
P
R
:
CAV format composed of luminance (Y) and two color difference signals (P
B
and P
R
)
Y/C
Also S-video. Describes the separation of video signal luminance and
chrominance components.
Zero Carrier Pulse (chopper)
In a TV demodulator, removes the carrier in the
vertical interval for a short period, enabling depth of field measurement.
