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參數(shù)資料
| 型號： | VDP3130Y |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 英文描述： | Video Processor Family |
| 中文描述： | 視頻處理器系列 |
| 文件頁數(shù)： | 15/76頁 |
| 文件大小： | 1770K |
| 代理商： | VDP3130Y |
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ADVANCE INFORMATION
VDP 313xY
Micronas
15
2.10.Display Part
In the display part the conversion from digital YC
R
C
B
to analog RGB is carried out (see Fig. 2
–
17 on
page 20). In the luminance processing path, contrast
and brightness adjustments and a variety of features,
such as black level expansion, dynamic peaking and
soft limiting, are provided. In the chrominance path, the
C
R
C
B
signals are converted to 4:4:4 format and filtered
by a color transient improvement circuit. The YC
R
C
B
signals are converted by a programmable matrix to
RGB color space.
The display processor can switch between two sepa-
rate control settings (main/side) for contrast,brightness
and matrix coefficients.
2.10.1.Luminance Contrast Adjustment
The contrast of the luminance signal can be adjusted
by multiplication with a 6-bit contrast value. The con-
trast value corresponds to a gain factor from 0 to 2,
where the value 32 is equivalent to a gain of 1.
2.10.2.Black Level Expander
The black level expander enhances the contrast of the
picture. Therefore the luminance signal is modified
with an adjustable, non-linear function. Dark areas of
the picture are changed to black, while bright areas
remain unchanged. The advantage of this black level
expander is that the black expansion is performed only
if it will be most noticeable to the viewer.
The black level expander works adaptively. Depending
on the measured amplitudes L
min
and L
max
of the low-
pass-filtered luminance (during a programmalbe verti-
cal window) and an adjustable coefficient BTLT, a tilt
point L
t
is established by
L
t
= L
min
+ BTLT
×
(L
max
L
min
).
Above this value there is no expansion, while all lumi-
nance values below this point are expanded according
to:
L
out
= L
in
+ BAM
×
(L
in
L
t
)
A second threshold, L
tr
, can be programmed, above
which there is no expansion. The characteristics of the
black level expander are shown in Fig. 2
–
10and
Fig. 2
–
11.
The tilt point L
t
is a function of the dynamic range of
the video signal. Thus, the black level expansion is
only performed when the video signal has a large
dynamic range. Otherwise, the expansion to black is
zero. This allows the correction of the characteristics of
the picture tube.
Fig. 2
–
10:
Characteristics of the black level expander
Fig. 2
–
11:
Black-level-expansion
a) luminance input
b) luminance input and output
L
min
BTLT
BAM
L
t
L
tr
L
max
L
tr
BTHR
L
in
L
out
a)
b)
L
min
L
t
L
max
L
t
相關PDF資料 |
PDF描述 |
|---|---|
| VDP31XXB | Video Processor Family |
| VDP3108PR | Consumer IC |
| VDSGLD_38.88 | TRANS PREBIASED PNP 200MW SOT23 |
| VDSL5100I | TVS 400W 43V UNIDIRECT SMA |
| VDSL5100 | TVS 400W 40V BIDIRECT SMA |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VDP3131Y | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family |
| VDP3132Y | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family |
| VDP3133Y | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family |
| VDP3134Y | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family |
| VDP313XY | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family |
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