Apple Final Cut Express HD - Manual (Page 1077)

1077
Glossar
y Glossary
4:3 The aspect ratio for broadcast video. The ratio of the width to the height of the
visible area of the video frame, also called the picture aspect ratio, is 4:3, or 1.33.
16-bit resolution A standard bit depth for digital audio recording and playback.
16:9 A widescreen aspect ratio for video. The ratio of the width to the height of the
visible area of the video frame, also called the picture aspect ratio, is 16:9, or 1.78. The
16:9 aspect ratio is used for high definition video.
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.
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.
AIFF (Audio Interchange File Format) A cross-platform file format supported by a
large number of digital video and audio editing applications. You can reduce the file
size of AIFF files with compressors, although this reduces the quality. AIFF audio can
use a variety of bit depths, but the three most commonly used are 8-,16-, and 24-bit.