CMN-91
Appendix C
Installation and Operation Manual
Glossary
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Revision D | Page 192
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
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.
Virtual Screen A container for PIPs and SHDW programs. Up to 12 virtual screens can be defined and
swapped. The virtual screen in the foreground shows PIPs, while up to 11 other virtual screens in the
background manage groups of SHDW programs.
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.
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 Adaptor
YPbPr: CAV format composed of luminance (Y) and two color difference signals (Pb and Pr)
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.