Japan has adopted ISDB-TSB for digital sound broadcasting, which is part of the ISDB set of standards. Argentina and Brasil have also adopted ISDB-T for television, but it is not yet known if they intend to use the system for digital radio also.
The digital radio broadcasts taking place currently are officially classified as test transmission, which are due to end in July 2011. When full-scale broadcasts begin, they will use new frequencies, and most likely new receivers will be required. It is expected that receivers for the current broadcasts will stop being available before that date.