Matrox DigiSuite LX MAX, Руководство пользователя и инструкция по установке

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Glossary of terms
inter-frame compression
A video
compression method that compares a series of
frames in a video sequence and removes the
redundant data. Inter-frame compression treats all
the frames in the sequence as an interdependent
group. As a result, most of the frames can’t be
edited independently.
Also called temporal
redundancy reduction. Contrast with intra-frame
compression. See also GOP.
interlaced scanning A method of creating a
video image by scanning only the odd numbered
lines on the screen in one pass, then the even
numbered lines in the next pass. Two passes are
therefore required to create a complete frame of
video. Non-interlaced scanning displays the odd
and even lines sequentially so that the complete
image is displayed in one pass. NTSC and PAL
displays are interlaced, VGA displays are non-
interlaced.
interpolate To create a gradual transition
between different effect settings applied to a clip.
For example, interpolating between a blue tint
effect and a red tint effect makes the clip gradually
change from blue to red.
See also keyframe.
intra-frame compression A video
compression method that removes redundant
information from within a frame. Intra-frame
compression treats each frame of a video segment
independently. Several video compression formats
use the intra-frame method. These include Motion-
JPEG, DV, and MPEG-2 I-frame.
Also called
spatial redundancy reduction. Contrast with inter-
frame compression. See also I-frame (Intra-
frame).
ISA slot Connection slot to a type of computer
expansion bus found in most computers. It’s larger
in size than the PCI slots found on most current
computers and provides connections to the slower
ISA bus. A variation found in some newer
computers is the EISA bus.
J
JPEG (pronounced “jay-peg”) Joint
Photographic Experts Group. A compression and
storage standard used for still, digital images.
See
also Motion-JPEG.
K
keyframe
A particular frame at which one or
more effects have been defined on a clip using the
Matrox realtime plug-in. Effects applied at a
keyframe remain active on the clip until a later
keyframe is defined to turn off or change the
effects.
See also interpolate.
key source The image that contains the colors
or luminance values on which you key to create a
chroma or luminance key effect.
L
lossless compression
See mathematically
lossless compression.
lossless video See uncompressed-quality
video.
lossy compression
A method of compressing
video that results in loss of image information, and
thus degrades the image quality. The loss of image
quality, however, may not be visible. On
DigiSuite, lossy compression performed using a
high data rate creates video that’s virtually
lossless.
Contrast with mathematically lossless
compression.
LTC Longitudinal Time Code. Time code that is
generally encoded as an audio signal onto a linear
audio track of a tape. This type of time code can be
read only while the tape is moving.
See also
VITC.
luminance The brightness portion of a video
signal. The luminance of a pixel determines its
brightness on a scale from black to white.
See also
chrominance.
luminance key
An effect that makes portions
of a foreground image fully or partially transparent