context: 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.
question: ৪. এসডিটিভি সম্প্রচারের ব্যান্ডউইথের সাথে চারবারের বেশি কোন ধরনের পরীক্ষার প্রয়োজন হয়েছিল?
answers: Early HDTV commercial experiments