Sony DFS-700 Manuel d'utilisateur télécharger pdf (Page 204)

Appendixes

A-66 Appendixes

Glossary

A-roll edit

An edit using one player and one

recorder for basic cut editing.

A/B roll edit

An edit using two players and one

recorder, to permit special effects

such as mix and wipe.

B–Y signal

A color difference signal. The blue

signal minus the Y signal.

Background picture

In animation effects, the picture

into which the foreground picture

is inserted. In transition effects, the

picture that is replaced as the effect

progresses (FROM picture). The

picture selected with the

BACKGROUND bus buttons.

Background through mode

In the DFS-700/700P, an output

mode in which the video input of

the background bus and the video

input of the foreground bus are

mixed for output. Normally the

two pictures are delayed by 1

frame, but in pre-read editing the

background bus picture is delayed

by 4 lines. Pre-read editing is

enabled by inserting the input of

the background bus into the output

of the recorder VTR. In this state,

the foreground bus input delay

becomes 1 frame + 4 lines.

Therefore, the VTR output that is

inserted into the foreground bus

must be read ahead by 1 frame.

Black burst

A sync signal composed of

composite sync and burst signals.

Bus

An internal signal path. Signals

selected for input to the bus are

passed on to the next process.

Chroma

In colors, hue and saturation.

Chroma key

Key effect in which a particular

color (usually a highly saturated

blue) is used to cut holes in a

background picture.

Color bar

A test signal displayed on a

monitor screen as vertical stripes

of different colors, used to adjust

hue and saturation.

Color matte

An internally generated color

signal with adjustable hue,

saturation, and luminance.

Component signal

Video signal containing separate

luminance (Y) and color difference

(R–Y, B–Y) video components.

Composite signal

Video signal containing video,

color burst, and sync signals.

Cross-point

An electronic switch where video

signal lines cross. When the switch

is closed, usually by pressing a

button, multiple input signals and

one or more output signals are

allowed to pass.

Cut

An instantaneous switch from one

picture to another, or the

instantaneous insertion or deletion

of a key signal.

Downstream key (DSK)

Effect used to superimpose

characters or graphics over output

signals. Called downstream key

because superimposing takes place

in the final stages of processing

after other effects have been

applied. Requires a key source

signal to define the outlines of the

characters or graphics, and a key

fill signal to fill the outlines. See

also “title key”.

Editing control unit

A video editor with functions for

remote control of VTRs, video

switchers, audio switchers, and

other video editing equipment.

Field

In the NTSC color television

system, 262.5 horizontal scanning

lines. Odd lines are scanned for the

first field before returning to the

top of the screen to scan even

lines. A frame is composed of two

fields: the odd and even fields.

Foreground picture

In animation effects, the picture

inserted into the background

picture. In transition effects, the

picture left on the screen after the

effect finishes (TO picture). The

picture selected with the

FOREGROUND bus buttons.

Frame

Two fields, containing all the

information in a complete picture.

Frame synchronizer

A device used to bring the timing

of unsynchronized video into

conformance with a local reference

signal.

Gen-lock

To synchronize output signals to

an external sync signal.

GPI

Abbreviation of general purpose

interface. An interface used to

carry out remote control from

editing control units lacking a

formal interface.

Hue

The attribute of colors that allows

them to be classified as red, green,

blue, and so on. Red and pink have

the same hue, but different

saturations.

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Sony DFS-700 Manuel d'utilisateur Page 204

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