Gige Vision Streaming Protocol (Gvsp); Digital Video Output (Bit Allocation); Bit Allocation (Pixel Format / Pixel Type) - (Monochrome Sensor); Gvsp_Pix_Mono8 (8Bit) - JAI AD-081GE User Manual

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9. GigE Vision
9.1.

Digital Video Output (Bit Allocation)

Although the AD-081GE is a digital camera, the image is generated by an analog component,
the CCD sensor.
The table and diagram below show the relationship between the analog CCD output level and
the digital output.
CCD out Analog Signal *
Black Setup 3.6%, 25mV
200mV
230mV
The standard setting for 10-bit video level is 890 LSB. A 200 mV CCD output level equals 100%
video output.
1023
890
32 Black Level
0
25 Analog Signal [mV]
9.2. Bit Allocation (Pixel Format / Pixel Type)
In the GigE Vision Interface, GVSP (GigE Vision Streaming Protocol) is used for an application
layer protocol relying on the UDP transport layer protocol. It allows an application to receive
image data, image information and other information from a device.
In the AD-081GE, the following pixel types supported by GVSP are available.
With regard to the details of GVSP, please refer to the GigE Vision Specification available from
the AIA (www.machinevisiononline.org).
9.2.1

GVSP_PIX_MONO8 (8bit)

1 Byte
Y0
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
9.2.2

GVSP_PIX_MONO10 (10bit)

1 Byte
Y0
0 1 2 3 4 5 6 7 8 9 X X X X X X 0 1 2 3 4 5 6 7 8 9 X X X X X X
AD-081GE
Streaming Protocol (GVSP)
8 LSB
700mV 222 LSB
800mV 255 LSB
White Clip Level
100% Level
700 800
2 Byte
Y1
2 Byte
Y0
Digital Out
8 bit 10 bit
32 LSB
890 LSB
1023 LSB
Fig. 16 Digital Output (10 bit output)
3 Byte
Y2
3 Byte
Y1
22
12 bit
128 LSB
3560 LSB
4095 LSB
4 Byte
Y1