參數(shù)資料
型號(hào)： VPX3224D
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)： 12/92頁
文件大?。?/td> 672K
代理商： VPX3224D
PRELIMINARY DATA SHEET
VPX 3225D, VPX 3224D
12
Micronas
In the NTSC compensated mode, Fig. 2–7 c), the color
signal is averaged for two adjacent lines. Thus, cross-
color distortion and chroma noise is reduced. In the
NTSC combfilter mode, Fig. 2–7 d), the delay line is in
the composite signal path, thus allowing reduction of
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.
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 for all three systems
are shown in Fig. 2–6. In S-VHS mode, this filter is by-
passed.
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
PAL/NTSC notch filter
Fig. 2–6:
Frequency responses of the luma
notch filter for PAL, NTSC, SECAM
SECAM notch filter
Chroma
Notch
filter
8
Chroma
Process.
CVBS
Y
1 H
Delay
8
CVBS
Chroma
Process.
Notch
filter
Y
8
Chroma
Process.
Luma
Y
8
a) conventional
b) S-VHS
d) comb filter
Fig. 2–7:
NTSC color decoding options
r b
Notch
filter
1 H
Delay
8
Chroma
Process.
CVBS
Y
c) compensated
C
r
C
b
C
r
C
b
C
r
C
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
C
r
C
b
C
r
C
b
MUX
Notch
filter
1 H
Delay
8
Chroma
Process.
CVBS
Y
Fig. 2–9:
SECAM color decoding
C
r
C
b
相關(guān)PDF資料
PDF描述
VPX3224E Video Pixel Decoders
VPX322XE Video Pixel Decoders
VQ1000J N-Channel Enhancement-Mode MOSFET Transistor(最小漏源擊穿電壓60V,夾斷電流0.225A的N溝道增強(qiáng)型MOSFET晶體管)
VQ1000J N-Channel 60-V (D-S) MOSFET
VQ1001J Dual N-Channel 30-V (D-S) MOSFET with Schottky Diode
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VPX3224D-C3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microprocessor
VPX3224E 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Pixel Decoders
VPX3225D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video Pixel Decoders
VPX3225D-C3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microprocessor
VPX3225E 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Pixel Decoders
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