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Appendix
A-6 (E)
Glossary
A/B roll editing
An edit in which two or more players are used to
create special effects such as dissolve and wipe,
and one recorder is used to record the results of the
edit.
Black burst
A video signal which has no luminance or
chrominance components, but contains all other
elements (sync and color burst) of a video signal.
Black burst is a common reference signal used for
synchronizing video equipment.
Color bar signals
Test signals displayed on the screen as vertical
stripes of different colors. Used for adjustment of
hue, saturation of a video camera and video
monitor.
Color framing
To adjust the player IN points relative to the
recorder IN points to maintain the color subcarrier
phase, one cycle of which consists of two (NTSC)/
four (PAL/SECAM) frames. However, this unit
does not modify the player IN point data. Instead it
uses the color framing servo functions of the
connected VTRs to achieve the same effect.
CTL (Control Signal)
Abbreviation of control signal. In VTRs, regular
pulses recorded in a longitudinal tape track. By
counting this signal, it is possible to determine the
number of frames, and hence the tape's running
time. Used mainly to adjust the tracking position
of video heads, and to achieve time code
continuity in continuous recording.
Dissolve
An effect in A/B roll editing, in which the old
video (FROM source) is faded out while the new
video (TO source) is faded in.
Drop-frame mode
A mode of time code running in which the time
difference between a time code and NTSC video
run is adjusted (the time code runs at 30 frames/
sec while the video runs at 29.97 frames/sec). The
time code and video are synchronized by dropping
the first two frames of the time code every minute,
except at the ten-minute marks. See also Non-drop
-frame mode.
Appendix
E-E mode (Electric-to-Electric mode)
The input signals are passed through the recorder's
electronics, but not through magnetic conversion
circuits such as heads and tapes, and supplied to
the output connectors. This mode is useful for
confirming the input signals.
Edit
To process original audio and video signals by
adding and replacing other signals over a specified
segment on a videotape.
In this manual, an edit also refers to the data used
to edit such a specified segment on a video tape.
GPI (General Purpose Interface)
An interface that allows this unit to control devices
such as still picture devices, character generators
and superimposers which are not equipped with a
defined interface.
Non-drop-frame mode
A mode of time code running in which the number
of frames of the time code and video run is not
adjusted.
See also Drop-frame mode.
NTSC (National Television System
Committee) system
A color television system developed by NTSC and
adopted as the standard television system in the
United States and Japan.
PAL (Phase Alternation by Line) system
A color television system developed in Germany
and adopted as the standard television system in
European countries.
Postroll
To run a videotape beyond an edit-end point to
check the picture that follows.
Preroll
To run a videotape to a point prior to an edit-start
point to enable the tape to reach a steady speed and
to synchronize.
Reference video signal
A video signal which contains a sync signal and
color burst signals, used as a reference for
synchronization of video equipment.
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