4 calculation of data transfer rat, At-140ge – JAI AT-140GE User Manual
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AT-140GE
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9.2.4 Calculation of Data Transfer Rate
In order to calculate the data transfer rate, the following parameters and formula are
required.
Setting parameter
Item
Unit
Symbol
Image Width
[pixels]
A
Image Height
[pixels]
B
Bits per Pixel
[bits]
C
Frame Rate
[fps]
D
Packet Size
[Bytes]
E
Number of Packets (including Data Leader & Trailer
Packet)
[packets]
G
Data Transfer Rate
[Mbit/s]
J
Fixed value
Item
Unit
value
Data Leader Packet Size
[Bytes]
90
Data Trailer Packet Size
[Bytes]
62
Formula to calculate Data Transfer Rate
J={90+62+(E+18)*(G-2)}*8*D/1000000
Where,
G=ROUNDUP{A*B*C/8/(E-36)}+2
The following table shows Bits per Pixel (Item C) which depends on the pixel format.
Pixel format
Bit
RGB8
24
RGB10V1Packed
32
RGB10V2Packed
32
Calculation example: AT-140GE Pixel type RGB8
Item
Unit
Symbol
Setting
Image Width
[pixels]
A
1392
Image Height
[pixels]
B
1040
Bits per Pixel
[bits]
C
24
Frame Rate
[fps]
D
20.77
Packet Size
[Bytes]
E
4036
Number of Packets (including Data Leader & Trailer
Packet)
[packets]
G
Transfer Data Rate
[Mbit/s]
J
G=ROUNDUP {(1392 x 1024 x 24/ 8 / (4036-36)) + 2 = 1086 + 2 = 1088
J={90+62+(4036+18)x(1088-2)} x 8 x 20.77 / 1000000 = 732 Mbit/s