Apple Final Cut Pro 6 - Manual (Page 1938)

Glossary 455
downmixing Also referred to as mixing down, the process used to combine multiple
audio channels to a single stereo (or dual mono) pair.
drop frame timecode NTSC timecode that skips ahead in time by two frame numbers
each minute, except every tenth minute, so that the timecode agrees with the actual
elapsed clock time. (Timecode numbers are skipped, but actual video frames are not
skipped.) This skipping corrects for NTSC’s actual frame rate of 29.97 fps. It corrects for
an inaccuracy of 3 seconds and 18 frames per hour in comparison to actual elapsed
time when non-drop frame timecode is used. To avoid confusion, dropframe timecode
should be avoided in film-based productions. Compare with non-drop frame timecode.
drop shadow An effect that creates an artificial shadow behind an image. Typically
used with graphics and text.
dual system recording A recording process in which video is captured on one recording
device and audio is recorded on another. Dual system audio must be synchronized onto
the source videotapes prior to capture, or synced up in Final Cut Pro.
duplicate frames indicator Colored bar that appears at the bottom of a clip’s video
item in the Timeline, indicating that frames are duplicated elsewhere in the sequence.
Useful for editing film where duplicate frames can cause complications during the final
negative cut.
duration The length of time between a clip’s In and Out points.
DV A standard definition digital videotape recorder format that records an 8-bit,
5:1 compressed component video signal with 4:1:1 color sampling (PAL uses 4:2:0).
Recorded using 1/4 inch tape. Supports two tracks of audio with 16-bit, 48 kHz audio
sampling, or four tracks of audio with 12-bit, 32 kHz audio sampling.
DVCAM A standard definition digital videotape recorder format that records an 8-bit,
5:1 compressed component video signal with 4:1:1 color sampling (PAL uses 4:2:0).
Recorded using 1/4 inch tape. Supports two tracks of audio with 16-bit, 48 kHz audio
sampling, or four tracks of audio with 12-bit, 32 kHz audio sampling.
DVCPRO A standard definition digital videotape recorder format that records an 8-bit,
5:1 compressed component video signal using 4:1:1 color sampling (PAL uses 4:2:0).
Recorded using 1/4 inch tape. Supports two tracks of audio with 16-bit, 48 kHz
audio sampling.
DVCPRO 50 A standard definition digital videotape recorder format that records an
8-bit, 3.3:1 compressed component video signal with 4:2:2 color sampling. Recorded
using 1/4 inch tape. Supports four tracks of audio with 16-bit, 48 kHz audio sampling.