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Appendix B, DigiSuite Glossary
synchronize video equipment and keep pictures
stable on the screen.
T
TBC
See time base corrector.
temporal redundancy reduction
See inter-
frame compression.
tile
A transition in which one image is gradually
replaced by another image that appears part-by-
part in successive squares. The squares follow a
given pattern until the entire screen is filled with
the new image.
time base corrector (TBC)
An electronic
device that, when connected to the output of a
VTR, corrects the stability and timing of the
VTR’s playback video. This is achieved by
stripping the unstable horizontal and vertical sync
pulses from the video signal, and replacing them
with new, clean sync pulses.
time code
A sequential code number assigned
to successive video frames on tape. Each frame has
its own time code, which is electronically encoded
on the tape in the form
hours:minutes:seconds:frames. See also drop-
frame time code, LTC, and VITC.
tint
An effect that replaces the chrominance
information of an image with a single color, but
keeps the luminance levels of the image intact. The
result is an image formed with shades of only one
color. This is useful for simulating “old-time”
sepia images.
U
Uncompressed-quality video
Video that has
the same image quality as uncompressed video,
but has been compressed using mathematically
lossless compression to optimize storage space.
Also called lossless video.
V
Video window
See DVE.
VITC
Vertical Interval Time Code. Time code
that is encoded onto the vertical blanking interval
of a video signal. VITC can be read by a VTR
whenever an image is displayed, but not usually
during high-speed operation. See also LTC.
Voice over
Narration added to a video segment
and mixed in louder than the original background
sounds.
W
wipe
A transition in which one image is
gradually replaced by another image that is
revealed in a given pattern. For example, the
second image could be revealed from the top of the
screen downwards until it fills the entire screen.
Y
Y/C video
A component video signal in which
the luminance (Y) and chrominance (C)
information are separate. S-VHS videocassette
recorders use the Y/C video format. Also called
S-Video.
Y, R-Y, B-Y video
An analog component video
signal comprised of three channels: Y
(luminance), R-Y (red minus luminance), and B-Y
(blue minus luminance).