What is HD?

HD or HD TV stands for high definition, and it's a new development in digital TV.

HD gives very clear, crisp pictures with vivid colours and up to five times more detail than ordinary standard definition TV. Some programmes are made with cinema-style 'surround sound'. HD broadcasts are particularly suited to flat TV screens (LCD and plasma).

Freesat: the subscription-free digital satellite TV service from the BBC and ITV includes BBC HD. To get Freesat, you make a one-off payment for the HD digital box and installation

Freeview HD: a television service that offers HD channels, including the BBC HD channel, available via your existing TV aerial, free. In order to view these HD channels you will need a Freeview HD box that connects to an HD-ready TV. You also get access to up to 50 SD digital channels and radio stations.