Nikon DSR-1500AP Bedienungsanleitung PDF herunterladen (Seite 107)

107

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.

–Y signal

A chrominance signal determined by

subtracting the Y (luminance) signal

from the B (blue) signal. One of the

component signals.

Capstan

A drive mechanism that moves the

tape at a specified speed. Its rotation

normally synchronizes with a

reference sync signal.

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.

Condensation

Condensation of moisture on the tape

transport mechanisms of VCRs

including the head drum. If moisture

condenses on the head drum, the tape

adheres to the drum and causes

malfunction.

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 VCR’s internal

circuits, but not to the recording

heads.

Head drum

A metal cylinder to which a video

head is attached. This drum is rotated

at high speeds in synchronization

with the sync signal during recording

and playback.

Linear editing

Editing while playing back video and

audio signals recorded on video tape.

See also “Non-linear editing.”

When being loaded, the tape is pulled

out of the cassette case and threaded

along the specified tape path and

wrapped round the drum to be ready

for recording or playback. Generally,

this is done automatically when you

place the cassette at the cassette

entrance of the VCR. Also called

threading.

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.

Preroll

Running of a video tape to a prior to

an edit-start point to enable the tape

to reach a steady speed and to be

synchronized with other video tapes.

–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.

Setup (for DSR-1500A)

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.

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