HD49801FB Datasheet, PDF (25/43 Pages) List of Unclassifed Manufacturers – Digital Signal Processing IC for CCD Cameras

HD49801FB
HD49801FB
• Iris
Pattern 1 is selected if the H count 6 is in the blanking period, and pattern 2 is selected otherwise.
H count
12345
6'
H count
132 465
1
1
2
3
4
5
3
2
6
5
4
Pattern 1
1
1
2
3
4
5
3
2
1'
6
5
4
3'
Pattern 2
The screen is divided into 6 regions
— The full integrated value (the average value of
Y following γ processing) for each region is
calculated for each field.
— Also, once for each field, the peak value for
region 1 is detected.
— However, the detection region can be set to an
arbitrary region (regions 1 to 6).
Each region can be changed in units of 32 fs^-1
horizontally, and 16 lines vertically.
State Data D3 D2 D1
Region
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1
4
1
0
0
5
1
0
1
6
1
1
0
Peak data
Note: For the peak data, the region is specified by
the A13 to A14 peak detection region.
Iris control is performed with the average value acquired by adding the weighted average values for each
region.
6
Σ Y i · ki
Y = ⁱ⁼¹
6
Σ ki
i=1
Where: Y: The average value for a single field.
Yi: The average value for each region.
ki: The weighting for each region.
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