Korean Central Television
Television jamming in South Korea was widespread before the introduction of Digital Multimedia Broadcasting (DMB) in South Korea. In Seoul, one could see color bars on particular channels of the VHF band used by (North) Korean Central Television. Now jamming with random signals on those channels is not done, but the channels are used for DMB broadcasting. The digital broadcasts provide reliable portable digital television multimedia broadcasts, but cause severe interference with the North Korean analogue signals.