Usage
In big dish satellite television viewing circles, 4DTV is essentially synonymous with signals that use the DigiCipher 2 standard of signal encryption and compression, also owned by Motorola, although the receivers are also capable of handling analog channels.
DigiCipher 2 was originally intended to be the digital signal compression standard for digital television and audio signals beamed to North America, but cannot be considered a de facto standard, due to the large number of DVB satellite signals available in North America.
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