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101
Glossary
Appendixes
Glossary
A/B roll editing
An editing method that uses two or
more playback VCRs to create
special effects such as dissolve and
wipe, and uses one record VCR to
record the results of the editing.
Using an editing control unit allows
efficient control of the VCRs and
very precise editing.
AES/EBU format
A unified format for digital audio
signals. It allows a single connector
to carry the signals for two channels.
B
–Y signal
A chrominance signal determined by
subtracting the Y (luminance) signal
from the B (blue) signal. One of the
component signals.
Chrominance signal
Color signal containing color
information such as hue and
saturation. Also called C signal.
Component signals (YRB)
A video signal consisting of a
luminance signal (Y) and two
chrominance signals (R−Y, B−Y).
Composite signal
A composite video signal containing
video, burst and sync signals.
Drop frame mode
Time code runs at 30 frames/sec. The
NTSC system, however, runs at
about 29.97 frames/sec. Drop frame
mode adjusts this difference. 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.
EE mode
EE is an abbreviation of “Electric to
Electric”. Video and audio signals are
supplied to the recorder’s internal
circuits, but not to the recording
heads.
LAN (local area network)
A network system connecting
computers over a local area, for
example one floor or all floors of an
office building, a factory, or a school.
Linear editing
Editing while playing back video and
audio signals recorded on video tape.
See also “Non-linear editing.”
Loop-through connection
A connection which allows a signal
input to an input connector to pass
through the unit and exit from an
output connector as input to external
equipment. Also called bridging
connection.
Luminance signal
The signal that determines the
brightness of the picture. Also called
Y signal. One of the component
signals.
Non-drop frame mode
The number of frames of the time
code and video run is not adjusted.
When you use the time code in non-
drop frame mode, the real playback
time will be about 86 seconds shorter
per day than the time code. If you edit
frame by frame or if you determine
the length of a shot by counting the
time code, use drop frame mode.
Non-linear editing
Editing while playing back video and
audio signals recorded on hard disks.
Video scenes stored on disk can be
cued up quickly, for increased editing
efficiency. See also “Linear
editing.”
PCM audio
This is an audio signal represented by
pulse code modulation. The analog
audio signal is first broken down into
a sequence of pulses, and these are
then represented digitally.
R
–Y signal
A chrominance signal determined by
subtracting the Y (luminance) signal
from the R (red) signal. One of the
component signals.
Reference video signal
A video signal consisting of a sync
signal or sync and burst signals, used
as a reference.
SBP2 (Serial bus protocol-2)
A protocol to control peripheral
devices connected to a computer by
IEEE1394.
Setup (for DSR-DR1000A)
The difference between the reference
black level and the blanking level of
a composite signal.
SMPTE
Abbreviation of Society of Motion
Picture and Television Engineers, a
professional association established
in the USA.
S/N
Abbreviation of Signal-to-Noise
(ratio). The higher the S/N value, the
less noise and higher the picture
quality.
Search mode
A VCR operating mode used when
searching for specific scenes, by
viewing the video output or time code
values while playing back the tape at
various speeds in forward or reverse
direction.
Subcarrier
A sine wave imposed on the
luminance portion of a video signal
and modulated to carry color
information. Its amplitude represents
color saturation and its phase
represents hue.
Superimpose
To put a set of characters onto a
picture so that both can be seen at the
same time.
S-video
A signal format in which Y
(luminance) and C (chrominance)
signals are separated to reduce
interference between them so that
noiseless images are reproduced.