Measures implemented by NHK and private TV broadcasting companies to control the copying of digital television programs have drawn a flood of complaints from TV users, with some saying they have been deprived of certain editing freedoms.
On April 5, NHK and the National Association of Commercial Broadcasters in Japan began airing their programs with a special transmission signal that allows only a single copy of the program to be made.
Because programs that have been copied once cannot be duplicated or edited digitally, editing the programs via a personal computer has become impossible.