參數(shù)資料
型號(hào)： RIVA128
廠商： 意法半導(dǎo)體
英文描述： RIVA 128⑩ 128-BIT 3D MULTIMEDIA ACCELERATOR
中文描述： 麗娃128⑩128位3D多媒體加速器
文件頁(yè)數(shù)： 43/85頁(yè)
文件大?。?/td> 609K
代理商： RIVA128
128-BIT 3D MULTIMEDIA ACCELERATOR
RIVA128ZX
43/85
7.1
The RIVA128ZX video scaler pipeline performs
stretching of video images inany arbitrary factorin
both horizontal and vertical directions. The video
scaler pipeline consists of the following stages:
1 Vertical stretching
2 Filtering
3 Color space conversion
4 Horizontal stretching
Vertical stretching
Vertical stretching is performed on pixels prior to
color conversion. Thevideo scaler linearly interpo-
lates the pixels in the vertical direction using an in-
ternal buffer which stores the previous line of pixel
information.
Filtering
After vertical interpolation, the pixels are horizon-
tally filtered using an edge-enhancement or a
smoothing filter. The edge-enhancement filter en-
hances picture transition information to prevent
loss of image clarity following the smoothing filter-
ing stage. The smoothing filter is a low-pass filter
that reduces the noise in the source image.
Color space conversion
The video overlay pipeline logic converts images
from YUV 4:2:2 format to 24-bit RGB true-color.
The default color conversion coefficients convert
from YCrCb to gamma corrected RGB.
Saturation controls make sure that the conversion
does not exceed the output range. Four control
flags in the color converter provides 16 sets of col-
or conversion coefficients to allow adjustment of
the hue and saturation. The brightness of each
R G B component can also be individually adjust-
ed, similar to the brightness controls of the moni-
tor.
VIDEO SCALER PIPELINE
Horizontal stretching
Horizontal stretching is done in 24-bit RGB space
after color conversion. Each component is linearly
interpolated using a triangle 2-tap filter.
Windowing and panning
Video images are clipped to a rectangular window
by a pair of registers specifying the position and
width.
By programming the video start address and the
video pitch, the video overlay logic also supports a
panning windowthat can zoominto aportion ofthe
source image.
Video composition
With the color keying feature enabled, a program-
mable key in the graphics pixel stream allows se-
lection of either the video or the graphics outputon
a pixel by pixel basis. Color keying allows any ar-
bitrary portions of the video to overlay the graph-
ics.
With color keying disabled and video overlay
turned on, the video output overlays the graphics
in the video window.
Interlaced video
The video overlay can display both non-interlaced
and interlaced video.
Traditional video overlay hardware typically drops
every other field of an interlaced video stream,
resulting in a low frame rate. Some solutions have
attempted to overcome the this problem by de-
interlacing the fields into a single frame. This
however introduces motion artifacts. Fast moving
objects appearing in different positions in different
fields,
when
deinterlaced,
artifacts which look like hair-like lines projecting
out of the object.
introduces
visible
相關(guān)PDF資料
PDF描述
RIX-0142-H FILTER IEC EINGANG ULTRA KOMPAKT 1A
RIX-0342-H FILTER IEC EINGANG ULTRA KOMPAKT 3A
RIX-0642-H FILTER IEC EINGANG ULTRA KOMPAKT 6A
RJ45SRB-BLACK TUELLE FUER RJ45 STECKER SW Inhalt pro Packung: 8 Stk.
RJ45SRB-BLUE TUELLE FUER RJ45 STECKER BLAU Inhalt pro Packung: 8 Stk.
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參數(shù)描述
RIVA128ZX 制造商:STMicroelectronics 功能描述:128-BIT 3D MULTIMEDIA ACCELERATOR, PBGA300
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RIVET-DPD-PIN-INSERT-SPCR 制造商:ITT Interconnect Solutions 功能描述:
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