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PDF KS7332 Data sheet ( Hoja de datos )
| Número de pieza | KS7332 | |
| Descripción | digital image signal handling IC aimed at improving image contrast and counter light correction | |
| Fabricantes | Samsung semiconductor | |
| Logotipo |  |
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KS7332
INTRODUCTION
PRODUCT SUMMARY
KS7332 is a digital image signal handling IC aimed at improving image contrast and
counter light correction, applicable to CCD-using video camera systems such as
camcorders and surveillance cameras. KS7332 receives the CCD output as digital
data, analyzes the image's luminance distribution, then outputs a signal with
improved dynamic range of luminance and color difference. It also uses a spatial
adaptive filter to remove low intensity noise and output a stable image.
FEATURES
• NTSC/PAL, Normal/Hiband, DVC compatible
• 10-bit A/D input
• Digital clamp
• WDR expansion using non-linear histogram modification
• Look up table (LUT) transform using line memory
• S1, S2 signals' HUE component correction by look-up-table transform
• Built-in memory for histogram storage
• Image analysis with histogram LOG function as reference
• Color sensitivity correction
• Serial micom interface
• Built-in operation for connection with AE
• 10-bit S1, S2 signal output for DCP I/F
• Spatial adaptive noise removal filter for low intensity images
• Interpretation of image characteristic through graphic OSD
48-LQFP-0707
MANUFACTURING PROCESS AND PACKAGE
Manufacturing process: 0.35 um silicon gate 3 metals 3.3V CMOS (CSP7L)
APPLICATIONS
• Camcorder system
• Surveillance camera, PC camera
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1 page  
KS7332
BLOCK DIAGRAM
A/D
TPUT/
S2
BITS
Gnal
SPSRAM
1023 × 10
Preprocess
SPSRAM
256 × 12
Histogram
SPSRAM
256 × 10
LUTB
SPSRAM
256 × 10
LUTA
SPSRAM
256 × 10
GRAPH
GRAPH
Preprocess
Histogram
Lookuptable
Luminance
EXPAND
ALPF
Segmentation
SPSRAM
256 × 10
ALPHA
MIX
Out
S1/10B
SIG
Chrominance
EXPAND
AE
MICOM
SYNC_GEN
Figure 2. Block Diagram
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5 Page 
KS7332
Look-Up-Table Block
The look-up-table block uses the output of the histogram generating block and the segmentation block to generate
a conversion function for the improvement of dynamic range. It is composed of the histogram integrating block,
look-up-table generating block, and the look-up-table 2nd differentiation.
• Histogram Integration
• Look-Up-Table Generating ability
• Look-Up-Table 2nd Differentiation
Luminance Expander
The luminance expander receives the LUT value from the look-up-table block and stores it in line memory. It also
moves the address by 1 and stores it in a different line memory. The LUT values stored in the two line memories
are put through temporal and spatial interpolation to receive data with an expanded band zone for luminance
signals.
• Line memory I/F function for look-up-table value storage
• Temporal interpolation
• Spatial interpolation
• 8-bit division for gain calculation
• Expanded luminance signal output feature
Chrominance Expander
The chrominance expander receives the outputs of the preprocessing block and the luminance expander, adjusts
the color difference signal according to the ratio between the expanded and non-expanded luminance signals, and
outputs the expanded chrominance signal. It also adjusts the color data's sensitivity according to the the band zone
of the luminance signal.
• Color difference signal adjustment according to ratio between expanded and non-expanded luminance signals
• Color data sensitivity adjustment according to luminance signal band zone
Adaptive LPF Block
The adaptive LPF block receives the output of the chrominance expander, reduces high frequency components
such as noise in areas with little change in the grey level, and emphasizes edge and other minute details. It also
uses a high pass filter to extract the edge of the image.
• Horizontal signal delay
• Weight calculation of neighboring picture element pixels
• Adaptive noise elimination
• Edge emphasis and extraction
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet KS7332.PDF ] | |
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