Appendixes
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.
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
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
Composite signal
Video signal containing video, color burst, and sync signals.
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.
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.