Terrestrial Digital Video Broadcasting.
DVB-T stands for Digital Video Broadcasting Terrestrial The broadcasting of digital TV via terrestrial Antenna (indoor / roof) has already started in some countries (UK, Australia, Germany).
Depending on the Transmission Mode about 15MBit can get transmitted per Transponder (Frequency). This is enough for one HDTV channel or 4-5 Standard Definition channels. Multiple channels can be organized in Bouquets (a bunch of services by a particular provider).