ICX055 SONY [Sony Corporation], ICX055 Datasheet - Page 10

• Manufacturer Part Number: ICX055
• Description: 1/3-inch CCD Image Sensor for PAL Color Camera
• Manufacturer: SONY [Sony Corporation]

Image Sensor Characteristics Measurement Method
These signals are processed to form the Y signal and chroma (color difference) signal. The Y signal is formed
by adding adjacent signals, and the chroma signal is formed by subtracting adjacent signals. In other words,
the approximation:
is used for the Y signal, and the approximation:
is used for the chroma (color difference) signal. For line A2, the signals output from Hreg in sequence are
The Y signal is formed from these signals as follows:
This is balanced since it is formed in the same way as for line A1.
In a like manner, the chroma (color difference) signal is approximated as follows:
In other words, the chroma signal can be retrieved according to the sequence of lines from R – Y and – (B – Y)
in alternation. This is also true for the B field.
1) In the following measurements, the substrate voltage and the reset gate clock voltage are set to the values
2) In the following measurements, spot blemishes are excluded and, unless otherwise specified, the optical
B
Measurement conditions
Color coding of this image sensor & Composition of luminance (Y) and chroma (color difference) signals
indicated on the device, and the device drive conditions are at the typical values of the bias and clock
voltage conditions.
black level (OB) is used as the reference for the signal output, which is taken as the value of Y signal output
or chroma signal output of the measurement system.
Y = {(G + Cy) + (Mg + Ye)}
R – Y = {(Mg + Ye) – (G + Cy)}
(Mg + Cy), (G + Ye), (Mg + Cy), (G + Ye).
Y = {(G + Ye) + (Mg + Cy)}
– (B – Y) = {(G + Ye) – (Mg + Cy)}
= 1/2 {2B + 3G + 2R}
= 1/2 {2B + 3G + 2R}
Color Coding Diagram
Mg
Cy
Cy
G
= {2R – G}
= – {2B – G}
Ye
Mg
Ye
G
Cy
Cy
Mg
G
Ye
Mg
Ye
G
1/2
1/2
Hreg
A1
A2
As shown in the left figure, fields are read out. The charge is
mixed by pairs such as A1 and A2 in the A field. (pairs such
as B in the B field)
As a result, the sequence of charges output as signals from
the horizontal shift register (Hreg) is, for line A1, (G + Cy),
(Mg + Ye), (G + Cy), and (Mg + Ye).
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