Guessing it’s generated by your TV. Look for a (I-Info) button on your TV remote. If you post make and model of your TV a member with the same or similar TV might be able to locate the Info button.
Basically it’s telling you the video information that the Humax is sending to the TV. This depends on the settings you have made on the Humax G2 box. Eg if you have set 1080p the TV info will say 1080p50