The DVB-T standard is the most successful digital terrestrial television standards in

the world. First published in 1995, it has been adopted by more than half of all

countries in the world. Since the publication of the DVB-T standard, however,

research in transmission technology has continued, and new options for modulating

and error-protecting broadcast steams have been developed. Simultaneously, the

demand for broadcasting frequency spectrum has increased as has the pressure to

release broadcast spectrum for non-broadcast applications, making it is ever more

necessary to maximise spectrum efficiency.

-The DVB-T standard is the most successful digital terrestrial television standards in

the world. First published in 1995, it has been adopted by more than half of all

countries in the world.　Since the publication of the DVB-T standard, however,

research in transmission technology has continued, and new options for modulating

and error-protecting broadcast steams have been developed. Simultaneously, the

demand for broadcasting frequency spectrum has increased as has the pressure to

release broadcast spectrum for non-broadcast applications, making it is ever more

necessary to maximise spectrum efficiency.