4DTV's the name of the digital TVRO communications satellite receiver technology manufactured by Motorola for use with large-diameter parabolic dish antennas on the C and Ku frequency bands. History Since 4DTV technology was originally developed in 1997 by General Instrument, now the broadband division of Motorola, it predates DVB-based digital television compression and's incompatible with the DVB standard. The DigiCipher II encryption system replaced the VideoCipher and VideoCipher II system… (More on 4dtv)