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VDP3108 Arkusz danych(PDF) 10 Page - Micronas

Numer części VDP3108
Szczegółowy opis  Single-Chip Video Processor
PDF  61 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  MICRONAS [Micronas]
Strona internetowa  http://www.micronas.com
Logo MICRONAS - Micronas

VDP3108 Arkusz danych(HTML) 10 Page - Micronas

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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
02
4
6
8
10
90
80
70
60
50
40
30
20
10
0
dB
MHz
10
02
4
6
8
10
0
–10
–20
–30
–40
SECAM notch filter
nsec
MHz
100
02
4
6
8
10
90
80
70
60
50
40
30
20
10
0
dB
MHz
10
02
4
6
8
10
0
–10
–20
–30
–40
nsec
MHz
100
02
4
6
8
10
90
80
70
60
50
40
30
20
10
0
NTSC notch filter
dB
MHz
10
02
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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