Apple Final Cut Express HD - Manual (Page 1096)

1096 Glossary
RGB Abbreviation for Red, Green, and Blue. A color space commonly used on
computers in which each color is described by the strength of its red, green, and blue
components. This color space directly translates to the red, green, and blue phosphors
used in computer monitors. The RGB color space has a very large gamut, meaning it
can reproduce a very wide range of colors. This range is typically larger than the range
that can be reproduced for broadcast.
ripple edit An edit in which the start and end times of a range of clips on a track are
adjusted when the duration of an earlier clip is altered.
roll edit An edit that affects two clips that share an edit point. For example, if Clip A
cuts to Clip B, a roll edit simultaneously adjusts the Out point of Clip A and the In point
of Clip B by the same amount. The overall duration of the sequence stays the same.
room tone The low level of background noise that exists in any recording. In order to
edit out unwanted sections of audio without creating obvious gaps of silence, it’s
common practice to record a certain amount of extra room tone during a shoot. You
can edit in the room tone whenever you need to cover a gap that was cut in the
location audio.
rotation In the Motion tab of the Viewer, the rotation value determines how many
times a clip circles around its center axis, without changing shape.
rotoscoping The process of manipulating or painting on individual frames. Usually
used to describe the act of tracing, frame by frame, a foreground element to be
isolated from the background of the frame.
rough edit The first editing pass. The rough cut is an early version of a movie that pulls
together its basic elements. Often, a rough edit is performed prior to adding
transitions, filters, and other effects.
ruler (1) The measurement bar along the top of the Timeline, which represents the
total duration of an edited sequence. Also displays the timecode corresponding to the
location of clips in the Timeline. You can move the playhead in the ruler in order to
navigate through clips in a sequence. (2) In the Transition Editor, a ruler displays a close-
up view of the frames surrounding the transition in the sequence. (3) In the Audio tab
of the Viewer, a ruler above the waveform display area shows the range of the currently
displayed clip.
sampling The process of measuring an analog signal and converting it into a digital
value. For example, the sampling rate of an audio stream specifies how many samples
are captured. Higher sample rates yield higher-quality audio.
saturation A measurement of chroma, or the intensity of color in the video signal.
scale In the Motion tab of the Viewer, an adjustable value that changes the overall size
of a clip. The proportion of the image may or may not be maintained.