Pyro Industries API-1394PCI Uživatelský manuál stáhnout pdf (Strana 322)

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■ GLOSSARY

FireWire The international hardware and soft-

ware standard for transporting data at speeds

of up to 400 megabits per second (Mb/s)

(1394a) or up to 800 megabits per second

(Mb/s) (1394b). Also known as iLink (Sony

trademark) 1394 or IEEE 1394.

flare Stray light that is usually reflected from

a medium, but is not part of an image.

flash frame Short unwanted frames. Also

refers to an effect in which a small number

of frames are added for impact. With an

Avid system, an editor can use the Find Flash

Frame command to find these bits.

flatbed A film-editing system for playing back

conformed workprint. Flatbeds are flat tables

with viewing screens attached. Most common

are KEMs and Steenbecks.

flex Also known as flex files or Aaton files, a

telecine log format whose files end with an

.flx suffix.

foley The background sounds and effects

added by foley artists during audio sweeten-

ing to increase realism.

format 1. To prepare a disk drive or floppy

disk for use. 2. A specific form that a

sequence must follow, or a show format used

in a television series, such as a tease, three

acts, and a conclusion.

formatting The transfer and editing of mate-

rial to form a complete program, including

any of the following: countdown, test patterns,

bars and tone, titles, credits, logos, space for

commercial, closed captioning, and so forth.

4:1:1 Subsampling rate of NTSC DV,

DVCAM, DVC PRO, and PAL DVCPRO.

4:2:0 Subsampling rate of PAL DV and

DVCAM.

4:2:2 A subsampling rate used in video images.

The higher the number, the better the sample.

Higher numbers also create higher data rates,

larger file sizes, and more complex pictures.

The first number refers to the luminance of

the picture. Second and third numbers refer

to color. Sometimes a fourth number is also

included, which refers to a key or alpha

channel. See subsampling. 4:2:2 is the sub-

sampling rate for formats such as Digital

Betacam, DVCPro50, and D9.

fps Acronym for frames per second. Used to

measure video or film playback rates.

frame One complete video picture. A frame

normally contains two video fields, scanned

at the NTSC rate of approximately 30 fps or

the PAL rate of 25 fps.

frame offset 1. A way of indicating a particu-

lar frame within the group of frames identi-

fied by the edge number on a piece of film.

For example, a frame offset of +12 indicates

the 12th frame from the frame marked

by the edgecode or key code. 2. The number

of frames needed to delay the playback of a

FireWire-based signal to maintain sync with

an external monitor. 3. In master-slave terms,

the number of frames of timecode that differ

in the master-slave relationship.

frame pulse A pulse emitted to the control

track signal.

frame synchronizer A device that converts non-

synchronous video sources into timed sources

through capture of entire frames. Also referred

to as a frame shaker.

freeze frame A video or film effect that

appears to stop the action through continu-

ous playback or integration of the same

single frame.

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