Specifications

Glossary
VTM-200 Installation and Operation Handbook E-9
Tally A system used to light lamps and indicate usage. Most production switchers have
an internal tally system to indicate selected functions, and which selected functions are
currently involved with Program.
TCP Transmission Control Protocol
Telecine A device used to convert film to video; movie film is digitally sampled and
converted to video frame by frame in real-time.
TCXO Temperature Compensated Crystal Oscillator
THD Total Harmonic Distortion
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
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.
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 1024x768 non-interlaced (progressive) display monitor.
YC
B
C
R
CAV format composed of luminance (Y) and two color difference signals (C
B
and C
R
).
Y/C Also S-video. Describes the separation of video signal luminance and
chrominance components.