History
4DTV technology was originally developed in 1997 by General Instrument, now the broadband division of Motorola. The 4DTV format is contemporary to the DVB-based digital television broadcast standard but its completion came before that of DVB and thus it is similar but incompatible with the DVB standard. The DigiCipher 2 encryption system is used in digital channels much like the VideoCipher and VideoCipher II systems were used for analog encrypted transmissions. Motorola abandoned 4dtv technology when they shut down the mapping stream on 12/31/2010 and converted most of the receivers in use to read one satellite only. There is an outfit that remaps receivers now based in Illinois so the receivers can be used to move the satellite dish again.
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