Matrox Axio Installation And User Manual page 259

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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
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
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.
PCI slot Connection slot to a type of
expansion bus found in many computers. It is
smaller in size than older ISA slots and
Appendix D, Matrox Axio Glossary
provides connections to the PCI host bus at
speeds up to 66 MHz.
PCIe slot See PCI Express slot.
PCI Express slot A type of PCI slot that
uses a different and much faster
communications protocol than a 32-bit PCI
slot. PCI Express can accommodate the
higher speeds required for high-performance
peripherals such as display cards and network
controllers. PCI Express slots are available in
different sizes (x1, x4, x8, and x16). Also
called PCIe slot.
PCI-X slot A type of PCI slot that
increases the speed at which data can move
within the computer from 66 MHz to up to
133 MHz.
P-frame (Predicted frame) A frame
created during the MPEG or MPEG-2 IBP
compression process. A P-frame is created by
using motion vectors to predict the
differences between it and the closest
previous I-frame or P-frame. This forward
prediction allows for higher compression than
with I-frames, but not as high as with
B-frames. P-frames, like B-frames, contain
only predictive data and therefore cannot be
edited independently.
pixel Picture element. The smallest portion
of an image that can be written to a display.
Each pixel in an image represents a single dot
on the computer screen. A picture's resolution
depends on the number of pixels on the
screen.
Plug and Play A hardware standard for
auto-configuration. It refers to the ability of
computer hardware to detect and configure
expansion devices such as your Matrox
hardware. Windows supports Plug and Play.