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參數(shù)資料
| 型號： | SDA9401 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Scan Rate Converter using Embedded DRAM Technology Units |
| 中文描述： | 掃描頻率轉(zhuǎn)換器采用嵌入式DRAM技術(shù)股 |
| 文件頁數(shù)： | 21/69頁 |
| 文件大小： | 1142K |
| 代理商： | SDA9401 |
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Micronas
21
Preliminary Data Sheet
SDA 9401
6.3.4 Noise reduction
The figure below shows a block diagram of the spatial and temporal motion adaptive noise
reduction (first order IIR filter). The spatial noise reduction of the luminance differs from the spatial
noise reduction of the chrominance. The structure of the temporal motion adaptive noise reduction
is the same for the luminance as for the chrominance signal.
Block diagram of noise reduction
6.3.4.1
Spatial noise reduction
Normally a spatial noise reduction reduces the resolution due to the low pass characteristic of the
used filter. Therefore the spatial noise reduction of the SDA 9401 works adaptive on the picture
content. The low pass filter process is only executed on a homogeneous area. That’s why an edge
detection controls the low pass filter process and depending on the result of the edge detection the
pixels for the low pass filter are chosen. The next figure shows a block diagram of the spatial noise
reduction. For the UV signal only a simple spatial noise reduction algorithm (vertical and/or
horizontal low pass filtering) is implemented.
YIN
Spatial
noise
reduction
Field
delay
YR
Motion
detector
Field
delay
UV1
Motion
detector
UVIN
TNRSEL
0
1
n
DY
DUV
Spatial
noise
reduction
SNRON
VCSNRON,
HCSNRON
TNRCLY,
TNRHOY,
TNRKOY,
TNRVAY,
TNRFIY,
NRON
TNRCLC,
TNRHOC,
TNRKOC,
TNRVAC,
TNRFIC,
NRON
KY
KUV
YSNR
UVSNR
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| SDA-95009-F | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Modular Jack, Right Angle, 6/4, Panel Stops |
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