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參數(shù)資料
| 型號(hào)： | VPC3200A |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Comb Filter Video Processor |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 16/78頁(yè) |
| 文件大小： | 1245K |
| 代理商： | VPC3200A |
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VPC 323xD, VPC 324xD
ADVANCE INFORMATION
16
Micronas
Fig. 2–12:
YC
r
C
b
downsampling lowpass-filter
2.5.2. Horizontal Prescaler
To achieve a horizontal compression ratio between
1/4 and 1/32 (e. g. for double window or PIP operation)
a linear downsampler resamples the input signal by 1
(no presampling), 2, 4 and 8.
2.5.3. Horizontal Scaling Engine
The scaler contains a programmable decimation filter,
a 1-H FIFO memory, and a programmable interpola-
tion filter. The scaler input filter is also used for pixel
skew correction, see 2.3.10. The decimator/interpola-
tor structure allows optimal use of the FIFO memory. It
allows a linear or nonlinear horizontal scaling of the
input video signal in the range of 0.25 to 4. The con-
trolling of the scaler is done by the internal Fast Pro-
cessor.
2.5.4. Horizontal Peaking-filter
The horizontal scaler block offers an extra peaking fil-
ter for sharpness control. The center frequency of the
peaking filter automatically adopts to the horizontal
scaling ratio. Three center frequencies are selectable
(see Fig. 2–13: )
– center at sampling rate / 2
– center at sampling rate / 4
– center at sampling rate / 6
The filter gain is adjustable between 0 – +10 dB and a
coring filter suppresses small amplitudes to reduce
noise artifacts.
2
4
6
8
-50
-40
-30
-20
-10
0
10
MHz
dB
1
2
3
4
-50
-40
-30
-20
-10
0
10
MHz
dB
Table 2–3:
Scaler modes
Mode
Scale
Factor
Description
Compression
4:3
→
16:9
0.75
linear
4:3 source displayed on
a 16:9 tube,
with side panels
Panorama
4:3
→
16:9
non-
linear
compr
4:3 source displayed on
a 16:9 tube,
Borders distorted
Zoom
4:3
→
4:3
1.33
linear
Letterbox source (PAL+)
displayed on a 4:3 tube,
vertical overscan with
cropping of side panels
Water glass
16:9
→
4:3
non-
linear
zoom
Letterbox source (PAL+)
displayed on a 4:3 tube,
vertical overscan, bor-
ders distorted, no crop-
ping
20.25
→
13.5 MHz
0.66
sample rate conversion
to line-locked clock
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相關(guān)代理商/技術(shù)參數(shù) |
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| VPC3200APSGP | 制造商:MICRONAS 功能描述:New |
| VPC3201A | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Comb Filter Video Processor |
| VPC3205C | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Comb Filter Video Processor |
| VPC3210A | 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Comb Filter Video Processor |
| VPC3210B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
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