User guide

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Glossary of terms
DVCPRO A professional variant of the DV
format developed by Panasonic that records
an 18 micron track on metal particle tape at a
data rate of 25 Mb/sec (2.98 MB/sec). Video
is sampled at 4:1:1 for both NTSC and PAL
sources.
DVCPRO50 A professional variant of the
DV format developed by Panasonic that uses
a data rate of 50 Mb/sec (5.96 MB/sec),
which is double the data rate of most other
DV formats. Video is sampled at 4:2:2 for
both NTSC and PAL sources to give enhanced
chroma resolution. It uses the same type of
tape as DVCPRO.
DVD Digital Versatile Disc or Digital Video
Disc. A type of compact disc that can hold
from 4.7 gigabytes (GB) to 17 GB of
information. The greatest advantage that
DVD has over CD is that it can store video as
well as audio and computer data. For video
storage, DVD uses MPEG-2 compression, to
provide better quality than standard VHS.
DVE Digital Video Effect. Generally, an
effect that resizes and repositions a picture on
the screen.
E
Edit Decision List (EDL) A file
containing a list of edit decision statements
used to create a video production.
edit master The first generation (original)
of a final edited tape.
expansion slot Electrical connection slot
mounted on a computer's motherboard (main
circuit board). It allows several peripheral
devices to be connected inside a computer.
See also AGP slot and PCI slot.
F
fade to black A transition commonly used
to signify the end of a scene, in which an
image or sound smoothly fades to a black
screen or silence (also called a fade-out
transition). Similarly, you could start a new
scene with a fade up from black (or fade-in)
transition.
field One-half of the horizontal lines
needed to make a complete scan of an
interlaced video frame. In the NTSC system,
two consecutive fields of 262.5 lines each
create a frame of 525 scan lines. In the PAL
system, two consecutive fields of 312.5 lines
each create a frame of 625 scan lines.
FireWire Apple Computer’s original
implementation of the technology that would
be standardized as IEEE-1394 in 1995.
Flex 3D A fully programmable architecture
that applies 3D texture mapping to video
using a Matrox 3D graphics accelerator chip
and graphics memory. See also texture
mapping.
frame A single video image. An interlaced
video frame is comprised of two consecutive
fields (the odd and even fields).
G
graphics overlay Text or a graphics
image that’s superimposed on video. Also
called super.
GOP Group of Pictures. The sequence of I,
B and/or P-frames produced during MPEG or
MPEG-2 compression. This sequence of
frames contains all of the information
required to reproduce a complete video
segment. The longer the GOP, the less
editable it is.
H
hardware-accelerated effect An effect
that requires the assistance of dedicated
hardware, such as Matrox RT.X100 Xtreme,
to play back in real time. Matrox advanced
DVE effects and page curls are examples of
hardware-accelerated effects. Compare with
CPU-based effect.