ATI Technologies X850 - Radeon Xt Platinum Edition 256 Mb Agp, Руководство пользователя

Страница: 71 / 90

63
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.
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.
HDTV
Acronym for “High Definition Television,” a format that produces much
greater picture quality than a standard television, and in a wide-screen
format that matches that of a movie theater screen. The two most popular
formats are 1080i and 720p, where the number represents how many
horizontal scan lines they have, and the following letter represents whether
the picture is interlaced, or the product of progressive scanning technology.
Interlaced displays paint the odd-numbered scan lines and then the even-
numbered lines to produce a picture, whereas progressive scan paints all of
the scan lines at once. Both formats use an aspect ratio of 16:9. In contrast,
standard North American television signals are displayed using 480
interlaced (480i) scan lines with a more square aspect ratio of 4:3.