參數(shù)資料
型號: VDP3108
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
英文描述: Single-Chip Video Processor
中文描述: 單芯片視頻處理器
文件頁數(shù): 10/61頁
文件大?。?/td> 2638K
代理商: VDP3108
VDP 3108
ADVANCE INFORMATION
MICRONAS INTERMETALL
10
2.2.8. Luminance Notch Filter
If a composite video signal is applied, the color informa-
tion is suppressed by a programmable notch filter. The
position of the filter center frequency depends on the
subcarrier frequency for PAL/NTSC. For SECAM, the
notch is directly controlled by the chroma carrier fre-
quency. This considerably reduces the cross-lumi-
nance. The frequency responses and the delay charac-
teristics of all three systems are shown below.
PAL notch filter
nsec
MHz
100
90
0
2
4
6
8
10
80
70
60
50
40
30
20
10
0
dB
MHz
10
0
2
4
6
8
10
0
–10
–20
–30
–40
SECAM notch filter
nsec
MHz
100
90
0
2
4
6
8
10
80
70
60
50
40
30
20
10
0
dB
MHz
10
0
2
4
6
8
10
0
–10
–20
–30
–40
nsec
MHz
100
90
0
2
4
6
8
10
80
70
60
50
40
30
20
10
0
NTSC notch filter
dB
MHz
10
0
2
4
6
8
10
0
–10
–20
–30
–40
Fig. 2–10:
Frequency Responses and Time Delay Characteristics for PAL, SECAM, NTSC
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