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參數(shù)資料
| 型號： | KSC7333 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Digital Image Stabilization and Digital Zoom Processor |
| 中文描述： | 數(shù)字圖像穩(wěn)定和數(shù)碼變焦處理器 |
| 文件頁數(shù)： | 11/44頁 |
| 文件大小： | 284K |
| 代理商： | KSC7333 |
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DATA SHEET
KS7333
11
DIGITAL ZOOM BLOCK
This block receives the AD-converted S1S2 format image as its input, puts it through DPCM compression, and
uses the external SDRAM to store the compressed image signal in real time, 1 field at a time. It then restores the
stored image signal and magnifies it to maximum 255 times the original, using the zoom coefficient controlled by
MICOM. The magnified image is divided into Y/C using the LPF and goes through the 256-step linear
interpolation.
The aperture feature precedes the linear interpolation, and the interpolated image signal is output through the
temporal IIR filter. At the same time, the output is stored in 2 fields of the SDRAM.
256-step linear interpolation
Y/C separation through LPF
Aperture feature for Y signals
1 field memory (16M SDRAM) used
DPCM compression/restoration for efficient memory use
Color edge suppression (5 tabs)
DCPM compression/restoration for efficient memory use
It's not matched between SDRAM data width (16 bits) for store and inputted image signal data width-10 bit.
Therefore, in case of storing inputted image, itself (10 bit) data, it's inefficient. To solve that, it compresses 20%
from 10 bit to 8 bit with that inputted image data width by adopting DPCM compression technology.
Y/C separation through LPF
Restored DPCM data which is S1 S2 format needs to separate Y/C for image processing, at this time, Y signal is
separated by LPF and C signal is separated by HPF.
Aperture feature for Y signals
This system is 4 line processing to vertical direction. Aperture to vertical direction decides to considering by
impulse response with using the spline method (refer the micom mode operation part). Horizontal aperture is
obtained by adjusting the gain with edge information by adopting 5 tabs.
Input
"00"
YHAFS[1:0]
"01"
"10"
"11"
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