Baumer VCXG .I - Transmission Delay for Multi-Camera

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8.4 Transmission Delay
Another approach for packet sorting in multi-camera operation is the so-called Transmis-
sion Delay.
Due to the fact, that the currently recorded image is stored within the camera and its
transmission starts with a predened delay, complete images can be transmitted to the
PC at once.
The following gure should serve as an example:
For the image processing three cameras are employed – for example camera 1: VXCG-
53M, camera 2: VXCG-13M, camera 3: VXCG-23M.
Due to process-related circumstances, the image acquisitions of all cameras end at the
same time. Now the cameras are not trying to transmit their images simultaniously, but –
according to the specied transmission delays – subsequently. Thereby the rst camera
starts the transmission immediately – with a transmission delay "0".
8.4.1 TimeSavinginMulti-CameraOperation
As previously stated, the transmission delay feature was especially designed for multi-
camera operation with employment of different camera models. Just here an signicant
acceleration of the image transmission can be achieved:
For the above mentioned example, the employment of the transmission delay feature
results in a time saving – compared to the approach of using the inter packet gap – of ap-
prox. 45% (applied to the transmission of all three images).
◄Figure59
Principle of the trans-
mission delay.
◄Figure60
Comparison of transmission
delay and inter packet gap,
employed for a multi-camera
system with different camera
models.