SK Telecom launched a satellite DMB service that delivers high-quality video broadcasts to a mobile phone or car-based video entertainment system. SK Telecom is initially delivering 11 video channels, 25 audio channels, and 3 data channels. Consumers in South Korea are able to receive the broadcasts either on mobile phones or in-car displays. The video uses MPEG-4 H.264 system and the music channels are furnished through a MPEG-2 AAC+ system.
In areas where the satellite view may be obstructed, such as alongside tall buildings, SK Telecom will boost its service using a signal “gap filler” from its mobile base stations and existing towers. The Ku-Band (13.824~13.883GHz) is used between the Signal Transmission Center and the satellite (which is positioned at 144 degrees east longitude), and the S-Band (2.630~2.655 GHz, 25MHz) is utilized between satellite and the mobile terminals. The Ku-Band (12.214~12.239GHz) is used between satellite and base stations providing supplemental signals.
http://www.sktelecom.com/eng/services/dmb/index.html
