User guide

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Glossary of terms
MPEG-2 I-frame An MPEG-2
compression type that uses only intra-frame
compression (that is, only I-frames are
created). Used for high-quality distribution
and for archiving.
MPEG HD An HD video recording format
developed by Sony that uses industry-
standard MPEG-2 IBP compression and
supports data rates of 17.5, 25, and
35 Mb/sec. Sony XDCAM HD devices use
MPEG HD compression for video recording.
mV Abbreviation for millivolt (one-
thousandth of a volt). Unit of measurement
sometimes used to define the amplitude of a
video signal. See also IRE unit.
MXF Material eXchange Format. A file
exchange format standardized by SMPTE that
assures interoperability among devices and
systems. Panasonic P2 (Professional Plug-in)
as well as Sony XDCAM and XDCAM HD
use .mxf files rather than .mov, .avi, or .mpg
files, for example. MXF is designed for
today’s file-based workflows and provides a
common way of packaging video and audio
along with metadata so that information about
the content is maintained as it flows through
the production process.
N
nonlinear editing Random access editing
that generally uses video and audio clips
stored on disks. Nonlinear editing programs
let you rearrange and edit clips without
having to redo the entire production, and
provide instant cueing to any frame in a clip
without waiting for tapes to rewind.
NTSC National Television Systems
Committee. The NTSC RS-170A standard
defines a method of broadcasting a color
signal that can be received by both
monochrome and color TVs. It uses a
composite interlaced display comprised of
525 scan lines per frame, refreshed at a rate of
approximately 30 frames per second.
Broadcast systems in North America and
Japan use the NTSC standard.
O
old movie effect A Matrox effect that lets
you simulate the look of old film by adding
noise, dust, streaks, jitter, and flickers to your
clip.
OP1a An Operational Pattern (OP) for the
MXF file format that interleaves the video
and audio into a single .mxf file. Sony
XDCAM .mxf files use the OP1a Operational
Pattern. See also OP-Atom.
OP-Atom An Operational Pattern (OP) for
the MXF file format that separates the video
and audio into separate .mxf files, but retains
the common metadata among related files.
Panasonic P2.mxf files use the OP-Atom
Operational Pattern. See also OP1a.
organic wipe A wipe effect that uses a
grayscale gradient pattern to switch from one
image to another by gradually revealing the
second image according to the pattern
P
page curl A Matrox effect that lets you
peel or roll an image off the screen to reveal
another image.
PAL Phase Alternate Line. A video
standard that uses a composite interlaced
display comprised of 625 scan lines per
frame, refreshed at a rate of 25 frames per
second. This is the broadcast video standard
for most of Europe.
pan & scan effect A Matrox effect that
lets you convert clips from one aspect ratio to
another, such as from 16:9 to 4:3.
PCI slot Connection slot to a type of
expansion bus found in many computers. It is
smaller in size than older ISA slots and
provides connections to the PCI host bus at
speeds up to 66 MHz.
PCIe slot See PCI Express slot.
Axio Installation and User Guide.book Page 307 Monday, July 14, 2008 8:00 AM