Early HDTV commercial experiments, such as NHK's MUSE, required over four times the bandwidth of a standard-definition broadcast. Despite efforts made to reduce analog HDTV to about twice the bandwidth of SDTV, these television formats were still distributable only by satellite.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Efforts were made to reduce analog SDTV to how much of the bandwith of SDTV?
unanswerable