Apple Final Cut Pro 6 - Manual (Page 1929)

446 Glossary
16 mm A film format for film and television presentations, which has a 4:3 aspect ratio.
24-bit resolution A bit depth used for high-quality audio playback.
32-bit floating point resolution An extremely high resolution bit depth used for
lossless computation of audio or video data.
35 mm A standard motion picture film format. This may be cropped during projection
to create widescreen aspect ratios such as 1.66 or 1.85, or filmed and projected
anamorphically for an aspect ratio of 2.40.
65 mm A film format for shooting widescreen presentations. This format is usually
printed with a soundtrack onto 70 mm film.
70 mm A film format for widescreen projections, which has a 2.2:1 aspect ratio.
180-degree rule When a new camera angle is more than 180 degrees different from
the previous camera angle, a shot with two people will appear to reverse positions
onscreen. When editing a scene with two people talking, it’s important not to cut to a
shot that crosses the 180-degree line that connects them.
action safe area 90% of the image area. Most of the time, anything in your video
image that’s outside of this area won’t be displayed on a television screen, so any
important material needs to be framed within the action safe area. Compare with title
safe area. See overscan.
Adjust Line Segment pointer A cross-shaped pointer that appears in the Timeline and
Viewer when you move the pointer over a line that can be adjusted, such as a line
segment between keyframes. The pointer has small arrows pointing up and down,
indicating the directions in which a line can be moved.
advanced pull-down See 2:3:3:2 pull-down.
AIFF (Audio Interchange File Format) A cross-platform audio file format developed by
Apple, based on Electronic Arts IFF (Interchange File Format). Like WAVE files, AIFF files
contain “chunks” of information such as the Sound Data Chunk, which contains the
actually sample data, and the Common Chunk, which contains sample rate and bit
depth information. An extension of the AIFF format, called AIFC, can store compressed
audio data.
alpha channel An image channel in addition to the R, G, and B color channels that is
used to store transparency information for compositing. Alpha channels are often 8-bit,
but some applications support 16-bit alpha channels. In Final Cut Pro, black represents
100 percent transparency, and white represents 100 percent opacity. Only certain formats,
such as Targa, TIFF, PICT, and the QuickTime Animation codec, support alpha channels.