參數(shù)資料
型號(hào): VPX3214C
廠商: Electronic Theatre Controls, Inc.
英文描述: Video Pixel Decoders
中文描述: 視頻解碼器像素
文件頁數(shù): 10/80頁
文件大小: 752K
代理商: VPX3214C
VPX 3220 A, VPX 3216 B, VPX 3214 C
PRELIMINARY DATA SHEET
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. 2–9:
Frequency responses and time delay characteristics for PAL, SECAM, and NTSC
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