If you have made the move to digital TV you might be familiar with the “red button” service, the idea of pressing the red button on your remote control to take you into digital interactive services. These are usually the modern equivalent of teletext from the old analogue days but can be a little more adventurous with services such as news or sport “multiscreen” services where you can choose a video you want to watch. Various technologies make these services possible, they all include ways to display information sent over the airwaves and also provide ways to show information provided over the Internet (if available on the set top box you are using). If you are using Ubuntu (or any Linux machine) you can get hold of software that will allow you to experiment with an open standard in this area called MHEG-5.