ISDB - Integrated Services Digital Broadcasting

[Derrick]

Integrated Services Digital Broadcasting (ISDB) is a digital television (DTV) and digital audio broadcasting (DAB) format unique only to Japan. It was created to allow radio and television stations there to convert to digital. Japan started development of the digital system in the 1980's and began terrestrial digital broadcasting in 2003. ISDB-T operates on unused TV channels, an approach taken by other countries.

Source: http://www.xceive.com/global_demo/digital.htm