Broadcasting HDTV On Analog Bands

Texas writes "Check out this new development in HDTV signal-encoding tech. As you know, HDTV currently requires an entirely separate broadcast channel, which the FCC have allocated to current broadcasters in order to simulcast HDTV and regular NTSC signals. This new tech from Los Alamos puts the HDTV info into the current NTSC band, and is even compatable with analog TV (which won't see the additional HDTV data since it's hidden in vestigal sidebands and unused closed caption data space). Also, this new method only requires slight changes to current NTSC broadcast stations and HDTV receivers, and will not make current analog sets obsolete."