G-6
Glossary
Fill or Insert Video:
The video or matte
signal used to fill the holes cut in the
background video by the key signal.
Firmware:
Physical devices (integrated
circuits) that house computer programs.
(Also see Hardware and Software.)
Flag:
A bit of information used to tell the
program that some condition has
occurred.
Flip-Flop:
A transition in which the
video sources selected on the background
buses exchange places at the end of the
transition; for example, the source selected
on A Background becomes selected on B
Background, and the source selected on B
Background becomes selected on A
Background.
Floppy Disk:
An electronic device which
is capable of storing data and programs for
ease of retrieval and use by a computer.
(Also see Hard Disk.)
Frame:
One complete video picture
consisting of two interleaved fields. In the
NTSC system, one frame makes up a
complete TV scanning cycle (1/30th of a
second). In the PAL system, two frames (at
1/25th of a second) are required to make
up a complete TV scanning cycle.
Frame (hardware):
The metal cabinet
which contains the switcher's circuit
boards.
Frame Lock:
Synchronization of the
video signal with a time code.
Freeze Frame:
The recording or storage
of a single frame of video.
Front Porch:
The portion of the video
signal that occurs during blanking and
extends from the end of active video to the
beginning of sync.
G
Gain:
An amplification adjustment of the
key source attribute (chrominance, hue,
luminance, etc.) to be used for keying. The
GAIN
control affects the sharpness of the
key edge.
Generation:
The number of times
removed a dupe is from the original
videotaped material. A copy of the
original is a second generation tape, and
so on.
GPI (General Purpose Interface):
An
electronic device containing several
electronic switches that can be activated
by a remote data signal. GPIs allow the
editing system to control various remote
components.
Gray Scale:
Range of luminance levels
from black to white.
H
Halo Border:
A soft wipe pattern border
which is mixed with different softness on
each of the two edges to give a halo effect.
Hard Copy:
A print out on paper of data
contained on another medium, such as a
monitor or disk.
Summary of Contents for Grass Valley 3000
Page 16: ...xvi Preface ...
Page 108: ...2 72 Section 2 Startup Configuration ...
Page 115: ...3 7 Transitions Figure 3 1 A Mix Transition Starting Video Midway Transition Ending Video ...
Page 141: ...4 3 Starting Conditions Figure 4 1 Source 1 Figure 4 2 Source 2 ...
Page 222: ...4 84 Section 4 Switcher Operations ...
Page 240: ...Appendix A Shaped and Unshaped Video A 18 ...
Page 256: ...B 16 Appendix B Keyframe Facts ...
Page 262: ...Appendix C Super Black C 6 ...
Page 276: ...G 14 Glossary ...