Pyro Industries API-1394PCI Bedienungsanleitung PDF herunterladen (Seite 325)

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GLOSSARY ■

video levels, originally established by the

Institute of Radio Engineers.

ISO 1. International Organization for Stan-

dardization 2. Refers to a video feed of a

single isolated camera, used frequently in

multicamera production.

ITU Acronym for International Telecommuni-

cations Union, a United Nations organization

that regulates all form of communication.

ITU-R BT 601 A document issued by the ITU

that recommends specifications for digital

component video. Formerly referred to as

CCIR-601.

ITU-R BT-709 A document issued by the ITU

that recommends specifications high-defini-

tion television (HDTV) signals. Formerly

referred to as CCIR-709.

jaggies The rough edges around computer-

generated graphic objects and titles. Can be

adjusted through anti-aliasing.

jam syncing The process of synchronizing a

secondary timecode generator with a selected

master timecode.

JFIF Acronym for JPEG File Interchange For-

mat. A file format that contains JPEG-

encoded image data, which can be shared

among various applications.

jogging The process of moving forward or

backward through media one frame at a

time. Also called stepping.

JPEG Acronym for Joint Photographic Experts

Group. A form of image compression for

both still and motion graphic images.

jutter Also called judder. A stopping and stut-

tering motion of video caused by pull-down

in the telecine process. 2:3 produces the most

telecine jutter. PAL B pull-down produces

very little.

kerning Adjustment of the spacing between

text characters.

key The combining of a selected image from

one source with an image from another source.

key channel An 8-bit, grayscale representation

of an image which determines masked areas

for keys. Also referred to as hi-con, hold-

out, cookie cutter, alpha channel, matte,

and mask.

key code Refers to the barcode reference

which is machine readable and is placed

adjacent to key numbers on a film. Key code

can be read by a telecine to generate a data-

base of numbers during a telecine transfer.

Commonly confused with key numbers.

key code reader A machine used in telecine that

reads the latent bar code on film. Key code

readers are located on the telecine scanner,

usually connected to a character generator

which can put key number burn-in windows

onto a transferred videotape.

key color The solid color used to key when

using blue screen or chroma key. Also used

in luma keys.

keyframes Points in time where you have set

effect parameter values. The system uses the

values set at keyframes and interpolates

changes between keyframes to create effects

and animation.

key numbers Latent edge numbers that appear

along the edge of the film near the sprocket

holes. The numbers are adjacent to Key

Code, a bar code system used in telecines to

identify the frames. Not to be confused with

ink or acmade numbers, which are printed

on the edge of film after the film is processed.

Key numbers are generally used for digital

editing more often than ink numbers.

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