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參數(shù)資料
| 型號： | sda 9254-2 |
| 廠商： | SIEMENS AG |
| 英文描述： | 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter(應用于TV的2.6 M位動態(tài)存儲器) |
| 中文描述： | 2.6兆比特的動態(tài)影視順序訪問應用程序的內存（電視，SAM）的具有片上降噪過濾器（應用于電視的260萬位動態(tài)存儲器） |
| 文件頁數(shù)： | 4/32頁 |
| 文件大?。?/td> | 182K |
| 代理商： | SDA 9254-2 |
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SDA 9254-2
Semiconductor Group
4
1998-01-16
Figure 3
Block Diagram of the Noise Reduction Filtering
To avoid artefacts in moving parts of the picture a motion detector is implemented to control the filter
coefficient K according to detected changes between two adjacent fields. The motion detector
performs a low pass filtering of the field differences and builds the absolute values. The results
control the filter coefficient K by choosing one of 13 predefined values between 1/4 and 1. The
characteristic of this assignment influences the amount of noise reduction and is adjustable via the
CLASS-pins. The calculation of the filter coefficient is practised for each pixel of the field.
These four possible adjustments put a wide field of different intensities of noise reduction at user’s
disposal.
The recursive filter also enables a reduction of cross color interference because the Motion Detector
exploits only luminance data.
Adjustment of the Characteristic of the Noise Reduction Filter
CLASS2
CLASS1
CLASS0
Amount of Noise Reduction
x
0
0
Low
x
0
1
Low-mid
0
1
0
Mid-high
1
1
0
High
x
1
1
Noise reduction off
MUX
UEB10381
8
Clock and
Control
DEMUX
Motion
Detector
DEMUX
Filter
Recursive
8
4
12
8
8
8
8
Input Chrominance
delayed Chrominance
12
3
12
K
Memory
Port C
Input
Luminance
delayed
Luminance
Memory
Port B
SDC0 ... 11
Video Input
CLASS
BLN
SCB
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| SDA9254-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter |
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