Videotek TVM9100PKG Installation And Operation Handbook page 284

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Transport Stream-ATSC (TS) Consists of the following: (1) Packets: 188 bytes -
fixed length with descriptive data, (2) Carries several programs, (3) has a PID which
identifies the type of TS packet (video, audio, other), and (4) carries descriptive
information about the program.
UHF Ultra High Frequency
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 and C input video
B R
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 P
CAV format composed of luminance (Y) and two color difference signals (P
:
B R 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.
260 TVM Series Installation and Operation Handbook
Copyright © 2008, Harris Corporation