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| 型號(hào)： | VDP3108PR |
| 英文描述： | Consumer IC |
| 中文描述： | 消費(fèi)性IC |
| 文件頁(yè)數(shù)： | 12/72頁(yè) |
| 文件大?。?/td> | 597K |
| 代理商： | VDP3108PR |
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VDP 31xxB
PRELIMINARY DATA SHEET
12
Micronas
cross-color components, as well as cross-luminance.
The loss of vertical resolution in the luminance channel
is compensated by adding the vertical detail signal with
removed color information.
Chroma
Notch
filter
8
Chroma
Process.
CVBS
Y
1 H
Delay
8
CVBS
Chroma
Process.
Notch
filter
Y
8
Chroma
Luma
Y
8
a) conventional
b) S-VHS
d) comb filter
Fig. 2
–
7:
NTSC color decoding options
r b
r b
r b
Notch
filter
1 H
Delay
8
Chroma
Process.
CVBS
Y
c) compensated
r b
Chroma
Notch
filter
1 H
Delay
8
Chroma
Process.
CVBS
Y
8
Chroma
Process.
Luma
Y
8
1 H
Delay
a) conventional
b) S-VHS
Fig. 2
–
8:
PAL color decoding options
r b
r b
MUX
Notch
filter
1 H
Delay
8
Chroma
Process.
CVBS
Y
Fig. 2
–
9:
SECAM color decoding
r b
2.3.8. 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 for all three systems
are shown in Fig. 2
–
10.
PAL/NTSC notch filter
dB
MHz
10
0
2
4
6
8
10
0
–
10
–
20
–
30
–
40
dB
MHz
10
0
2
4
6
8
10
0
–
10
–
20
–
30
–
40
Fig. 2
–
10:
Frequency responses of the luma
notch filter for PAL, NTSC, and SECAM
SECAM notch filter
2.3.9. Skew Filtering
The system clock is free-running and not locked to the
TV line frequency. Therefore, the ADC sampling pattern
is not orthogonal. The decoded YC
r
C
b
signals are con-
verted to an orthogonal sampling raster by the skew fil-
ters, which are part of the scaler block.
The skew filters allow the application of a group delay to
the input signals without introducing waveform or fre-
quency response distortion.
The amount of phase shift of this filter is controlled by the
horizontal PLL1. The accuracy of the filters is 1/32
clocks for luminance and 1/4 clocks for chroma. Thus
the 4:2:2 YC
r
C
b
data is in an orthogonal pixel format
even in the case of nonstandard input signals such as
VCR.
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| VE-18H-K | POWER RELAY 1 POLE-5 A (MEDIUM LOAD CONTROL) |
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