Apple Final Cut Pro 6 - Manual (Page 1942)

Glossary 459
headroom The available range in decibels (dB) that falls in between the reference
level that is used to denote the average loudness of a mix and 0 dBFS. If you mix your
project with the reference level set to –12 dBFS, you have 12 dB of headroom available
before the signal is clipped. If the audio in a sequence has a wide dynamic range, you
set the reference level low enough to create enough headroom so that no part of the
signal goes above 0 dBFS.
Hi8 An analog videotape format. Introduced as a higher quality version of 8 mm.
Histogram A video scope in Final Cut Pro that displays the relative strength of all luma
values in a video frame, from black to super-white. It is useful for comparing two clips
in order to match their brightness values more closely.
hue An attribute of color perception, also known as color phase. Red, blue, yellow, and
green are all different hues.
image sequence A movie exported as a series of numbered image files, stored in a
folder. Each image file contains one frame of video. The Targa and TIFF file formats are
commonly used to export image sequences for file interchange among different film
compositing workstations.
importing The process of bringing files of various types into a project in Final Cut Pro.
Imported files can be created in another application, captured from another device, or
brought in from another Final Cut Pro project.
IMX A standard definition, all–I-frame MPEG-2 format stored on tape, optical disc, or
disk drive. Some IMX decks can play back and convert formats such as Digital Betacam,
Betacam SX, and Betacam SP to IMX. The data rate of IMX can be set to 30-, 40-, or 50 Mbps.
incoming clip The clip to which a transition segues. For example, if Clip A dissolves to
Clip B, Clip B is the incoming clip.
In point The edit point that specifies the first frame of a clip to be edited into a sequence.
insert edit An edit in which a clip item is added to a track in the Timeline at a specified
point, moving clips (or parts of clips) after that point to the right. An insert edit does
not replace existing material.
interlaced video A scanning method that divides a video frame into two fields, each
consisting of alternating odd and even lines, which are scanned at different times.
IRE (Institute of Radio Engineers) Also refers to an analog video signal unit of
measurement for luma, established by the Institute of Radio Engineers.
ITU Abbreviation for International Telecommunications Union.
J-cut See split edit.