My organization hosts a live auction each year with a live auctioneer. At the event, there are anywhere from 900-1000 people in attendance. The auctioneer stands on stage and to his left and right are two large (14 foot) screens showing each item. We display these images with PowerPoint. With so many people in the audience, it's tough to know what the current bid is. This year I want to show the current bid on the screen with the image of the item. Meaning I need a way to enter an amount live as each item is up for bid and as the price goes up, enter the new amount and have it display with the image of the item. The big car auction houses do this from what I've seen on TV.
I'm looking for some insight on how this can be accomplished. My thought is using a CG. We already run everything through a switcher since we have another source to display from time-to-time. But I don't know what CG (if any) can do this.