參數(shù)資料
型號: 9402AVK
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: 14 X 14 MM, 2 MM HEIGHT, PLASTIC, MS-022, MQFP-80
文件頁數(shù): 45/126頁
文件大小: 1673K
代理商: 9402AVK
DATA SHEET
Micronas
Aug. 16, 2004; 6251-552-1DS
25
2.5.2. Digital Color Transition Improvement (DCTI)
A digital algorithm is implemented to improve horizon-
tal transitions of the chrominance signals resulting in a
better picture sharpness. A correction signal propor-
tional to the slope of the detected horizontal transition
of the input signal is added to the original input signal.
The amplitude of the correction signal is adjustable by
the I2C bus parameter ASCENTCTI.
The IC bus parameter THRESHC modifies the sensi-
tivity of the DCTI circuit. High values of THRESHC
result in an improvement of significant color transitions
only.
Table 2–11: Conversion table between HCOF/BCOF
and GAINHP/GAINBP
BCOF
GAINBP
HCOF
GAINHP
0
10
1
0.75
1
0.75
2
0.50
2
0.50
3
0.25
3
0.25
4
0.00
4
0.00
5
0.25
5
0.25
6
0.50
6
0.50
7
0.75
7
0.75
8
1.00
8
1.00
9
1.25
9
1.25
10
1.50
10
1.50
11
1.75
11
1.75
12
2.00
12
2.00
13
2.50
13
2.50
14
3.00
14
3.00
15
4.00
15
4.00
Table 2–12: Peaking filter adaption for 36 MHz or 27 MHz operation
Expansion Factor of
Postscaler
Corresponding Frequency of Input
Signal for Center Frequency
Bandpass (B=0.25)
CLKB36=36 MHz/27 MHZ
Corresponding Frequency of Input
Signal for Center Frequency Highpass
(B=0.5)
CLKB36=36 MHz/27 MHZ
0.75
3.375 MHz / 2.5 MHz
6.75 MHz / 5.06 MHz
...
1
4.5 MHz / 3.375 MHz
9 MHz / 6.75 MHz
...
3
13.5 MHz / 10.125 MHz
27 MHz / 20.25 MHz
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