11. About Epiphan frame grabbing technology
Glossary of Terms
User Guide
Page 47
Capturing DVI or dual DVI data involves using a Frame Grabber
to convert DVI or dual DVI data into frames that can be
transmitted over a USB connection to the Epiphan video capture
application.
Capturing can also compress images before they are transmitted.
Frames must be captured before they are displayed, printed, or
recorded by the Epiphan video capture application.
Color resolution
“Color depth, bits per pixel (bpp)” on page 45
.
DVI
Digital Visual Interface (DVI) is a digital standard for
transmitting visual data from a graphics source (such as a PC
video card) to a display device (such as a computer monitor).
Many devices that output digital visual images use the DVI
standard for transmitting visual data. All Epiphan DVI2USB
Frame Grabbers capture digital DVI frames and convert them to
digital signals that are transmitted to the Epiphan video capture
application using a USB connection. This USB data is then
interpreted and displayed using the Epiphan video capture
application.
Frame Grabber
A hardware device that captures frames from analog VGA signals
or digital DVI streams. Epiphan Frame Grabbers may modify
captured frames and compress them before sending them to a
video capture workstation over a USB connection.
Frame
A frame is one of the many still images which can be combined to
create a moving picture such as a video image. The term frame
comes from the film industry. Film images are recorded on a strip
of photographic film and each image looks like a framed picture.
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