Video broadcast requirementsDuring the Tour across Italy, ARGO broadcasted a live video stream to the Internet. To accomplish this target a permanent link to the Internet was established.
The problemA permanent link from a moving vehicle implies the use of mobile telecommunications facilities, such as GSM modems. Unfortunately the use of GSM modems for live video streaming compels to face the following constraints:
The solutionIn order to increase the throughput of the link the simultaneous use of two GSM modems has been studied. Two different techniques were conceived to exploit multiple phone lines:
The implementationAnother personal computer was installed on ARGO; it was equipped with a parallel port Quickcam Color camera and two GSM modems able to work up to 9600 bps using the MNP10-EC protocol. The computer runs the Linux operating system and a specific application that grabs images from the Quickcam, convert them in the jpeg format, and send them to our web server through the two GSM modems exploiting EQL.