Postwar broadcast coverage was extended to Birmingham in 1949 with the opening of the Sutton Coldfield transmitting station, and by the mid-1950s most of the country was covered, transmitting a 405-line interlaced image on VHF.[original research?]
পঞ্চাশের দশকের মাঝামাঝি সময়ে বিবিসি কি ধরনের ছবি সম্প্রচার করেছিল?
405-line interlaced image