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component video A video signal having
separate channels for the video information,
as opposed to a combined (composite) signal.
Y, R-Y, B-Y video is a component video
signal.
composite video A video signal
containing luminance and chrominance
information that has been combined using a
video standard such as NTSC or PAL.
Composite video often uses a single RCA or
BNC cable connection. See also component
video.
contrast The difference in brightness
between the lightest and darkest areas of an
image on the screen.
CPU Central processing unit. The central
processor of a computer that performs
calculations and interprets and executes
commands.
CPU-based effect
advantage of your computer's CPU to play
back in real time. Matrox Flex CPU effects,
such as the Matrox color correction effects,
are CPU-based effects. Compare with
GPU-based effect.
crawl Sideways movement of text across a
screen. See also roll (1).
crossfade See dissolve.
cut
A direct switch from one video and/or
audio source to another.
D
D-9 Originally known as Digital-S. A
variant of the DV format developed by JVC
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 a 1/2"
metal particle tape.
Appendix D, Matrox Axio Glossary
An effect that takes
D10 See IMX.
Digital8 A camcorder video format
developed by Sony. Digital8 camcorders use
the DV format to record digital video and
audio onto 8mm and Hi-8 tapes via any
device that has an IEEE-1394 interface.
Digital-S See D-9.
digital signal A signal representing video
or audio information as binary digits that can
be easily regenerated with no noise or
distortion. See also analog signal.
Digital Video See DV.
digitize To convert analog information,
such as a video signal from a VTR or camera,
into digital information that can be processed
and stored by a computer.
Direct memory access (DMA) A
technique used to rapidly transfer data
between an attached device, such as a disk
drive, and the computer's main memory
without needing to pass the data through the
CPU.
DirectX A Microsoft-developed program
that enables interfaces to support advanced
hardware features without being written
specifically for each hardware model.
DirectShow (formerly called ActiveMovie) is
part of DirectX.
display card A card that has its own
memory and processor to handle graphics and
enhance display capabilities. Also called
graphics card. See also GPU.
dissolve A transition in which one image
smoothly fades to another image. It is
characterized by the gradual ending of one
image occurring simultaneously with the
gradual beginning of another. Also called
crossfade.
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