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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)： | 9/80頁 |
| 文件大?。?/td> | 752K |
| 代理商： | VPX3214C |
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VPX 3220 A, VPX 3216 B, VPX 3214 C
PRELIMINARY DATA SHEET
MICRONAS INTERMETALL
9
2.2.6. Color Killer Operation
The color killer uses the burst-phase, -frequency mea-
surement to identify a PAL/NTSC or SECAM color sig-
nal. For PAL/NTSC, the color is switched off (killed) as
long as the color subcarrier PLL is not locked. For
SECAM, the killer is controlled by the toggle of the burst
frequency. The burst amplitude measurement is used to
switch-off the color if the burst amplitude is below a pro-
grammable threshold. Thus, color will be killed for very
noisy signals. The color amplitude killer has a program-
mable hysteresis.
2.2.7. Delay Line/Comb Filter
The color decoder uses one fully integrated delay line.
Only active video is stored.
The delay line application depends on the color stan-
dard:
– NTSC:
combfilter
or
color compensation
– PAL:
color compensation
– SECAM:
crossover-switch
In the NTSC compensated mode, Fig. 2–6 c), the color
signal is averaged for two adjacent lines. Therefore,
cross-color distortion and chroma noise is reduced. In
the NTSC combfilter mode, Fig. 2–6 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.
Chroma
filter
Chroma
CVBS
Y
1 H
CVBS
Chroma
filter
Y
Chroma
Luma
Y
a) conventional
b) S-VHS
d) Comb Filter
Fig. 2–6:
NTSC color decoding options
r b
r b
r b
filter
1 H
Chroma
CVBS
Y
c) compensated
r b
Chroma
filter
1 H
8
Chroma
CVBS
Y
MUX
Chroma
Luma
Y
filter
1 H
Chroma
CVBS
Y
1 H
a) conventional
b) S-VHS
Fig. 2–7:
PAL color decoding options
Fig. 2–8:
SECAM color decoding
r b
r b
r b
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VPX3224D | Video Pixel Decoders |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VPX3214C(PLCC44) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit |
| VPX3214C(QFP44) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit |
| VPX3216B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video Pixel Decoders |
| VPX3216B(PLCC44) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit |
| VPX3216B(QFP44) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit |
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