Information AboutDigicipher |
| CATEGORIES ABOUT DIGICIPHER 2 | |
| cryptographic protocols | |
| digital television | |
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The original attempt for a North America n digital signal Encryption and compression standard was DigiCipher 1, which was used most notably in the now-defunct PrimeStar medium-power DBS system during the early 1990s . The DCII standard predates wide acceptance of DVB -based digital terrestrial television compression (although not cable or satellite DVB) and therefore is incompatible with the DVB standard. The primary difference between DigiCipher 2 and DVB lies in how each standard handles SI, or System Information. DigiCipher 2 also relies on the fact that its signals must be understood in terms of a virtual channel number in addition to the DCII signal's downlink frequency, whereas DVB signals have no virtual channel number. Approximately 70% of newer first-generation digital cable networks in North America use the 4DTV /DigiCipher 2 format. The use of DCII is most prevalent in North American digital Cable Television set-top boxes. DCII is also used on Motorola's 4DTV digital satellite receiver and StarChoice 's DBS receiver (StarChoice is based in Canada ). EXTERNAL LINKS |
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