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26 Glossary - Synchronization
Flat Shading
A lighting technique that shades each polygon of a 3D object based on where the
source of the light is and the angle of the polygon in relation to it. It enables relatively
fast rendering of 3D objects, although it can make those objects appear "faceted" as
each visible polygon is set to a particular color value, and consequently does not
produce as realistic an effect as obtained when using Gouraud shading.
Fog
Term used to describe the blending of an object using a fixed color as objects are
made to appear more distant from the viewer.
Frame Buffer
The portion of the memory buffer on the graphics card used to store the image
being displayed. All rendering processes have been accomplished by this stage and
this buffer contains only a one-to-one relationship of the data to be relayed to the
display.
Framelocking
Framelocking synchronizes the video frames on multiple displays to a signal
generated internally by the hardware (using output locking and, optionally,
genlocking). This allows images displayed on multiple monitors to create a large
virtual canvas. In addition, 3D rendering between GPUs is synchronized (swap
locking).
Frames Per Second
In terms of 3D graphics, refers to the rate at which the graphic processor can render
new screens per second. Higher rates equals better, more naturalistic performance
for such things as games set in a 3D environment. Sometimes abbreviated to “fps.”
Gamma
Sometimes confused with brightness, gamma actually refers to the correction that
is applied to any display device in order to produce more gradual increases or
decreases in the perceived brightness for that device. A change in gamma produces
a non-linear change in the color curve, ensuring that perceived changes in color
and intensity are consistently applied.
Genlocking
Genlocking synchronizes video outputs with an external reference signal
generator. This ensures that video output sources from multiple video output
devices (such as workstations, cameras, or video recorders) are combined or
switched properly.
Gouraud Shading
A shading method used to produce a smooth lighting effect across a 3D object. A
specific color is used at each vertex of a triangle or polygon and interpolated across
the entire face.
GPU
GPU is an acronym for “Graphics Processing Unit.” The GPU powers the operations
of a graphics card including support for 2D/3D and video.
HDCP
HDCP is an acronym for “High-Bandwidth Digital Copy Protection.” It is a form of
digital rights management designed to protect copyright of signals being
transported across DVI or HDMI™ connections. Several international regulatory
bodies have recommended its incorporation into high-definition display and
playback devices.
ATI FirePro™ S400 Syncronization Module
© 2009 Advanced Micro Devices, Inc.