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參數(shù)資料
| 型號： | SDA9280B22 |
| 廠商： | SIEMENS A G |
| 元件分類： | 消費家電 |
| 英文描述： | ICs for Consumer Electronics |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC68 |
| 文件頁數(shù)： | 15/43頁 |
| 文件大小： | 249K |
| 代理商： | SDA9280B22 |
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SDA 9280 B22
Semiconductor Group
15
1998-02-01
Figure 5
Digital Color Transient Improvement
2.5
A graphic display effect is realized by programmable reduction of amplitude resolution
(
Ι
2
C signals: YGR, YGRRES, CGR, CGRRES). A resolution of 1 to 4 bits is available. A
special characteristic avoids a reduction of picture brightness and color saturation.
The inverted display mode is attained by a programmable bit inversion for each signal
component (
Ι
2
C signals: YINV, UINV, VINV).
Multiple combinations of both manipulations supply very amazing effects on the display.
Picture Manipulations
2.6
The compander enables a display with correct geometric proportions of 4:3 signals on
16:9-screens or 16:9-signals on 4:3-screens. A full screen display of 4:3-letterbox
signals on 16:9-screens is also practicable. Having a full screen display of such signals
on 4:3-screens only a part of the picture can be shown. In this operation mode a
horizontal shift of the picture part used for display is programmable (
Ι
2
C signal: READD).
Expansion in vertical direction must be realized by manipulation of the vertical deflection
current.
To satisfy all these demands a horizontal compression or expansion of the video signals
is performed by raising or reducing the sample frequency. The data are written into a
memory using the system clock CLL and read with a clock of higher or lower frequency.
16:9-Operation, Signal Compander
UES10248
LPU
THRESH
UIN
Derivative
Threshold
Detection
VIN
LPV
LPUV
Zero
Transition
Width
Control
First
Second
Derivative
of Steep
Transition
Insertion
UOUT
VOUT
TRAWID
POS
WIDTH
First
Derivative
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