Who is using each system?
At present, CBS delivers its filmed and live HD programs in 1080i, as does NBC, PBS, The WB, and UPN stations owned by CBS. Cable and satellite premium networks such as HBO, Showtime, Discovery HD, HDNet, HDNet Movies, INHD, and NBA TV use the 1080i format exclusively to broadcast movies and special programs. ABC and ESPN HD networks broadcast prime-time programs, live events, and sports exclusively in 720p. The Fox network currently broadcasts 480p digital television, with plans to switch to the 720p HDTV format starting in the fall of 2004.