DigiCipher 2, or simply DCII, is a digital signal compression standard used on many communications satellite television and audio signals. A communications satellite (sometimes abbreviated to comsat) is an artificial Satellite stationed in space for the purposes of Telecommunications. Television ( TV) is a widely used Telecommunication medium for sending ( Broadcasting) and receiving moving Images, either monochromatic The DCII standard was originally developed in 1997 by General Instrument, which is now the broadband division of Motorola. Year 1997 ( MCMXCVII) was a Common year starting on Wednesday (link will display full 1997 Gregorian calendar General Instrument (GI was an Electronics Manufacturer based in Chicago, IL specializing in Semiconductors and Cable television Motorola Inc ( is an American, multinational Fortune 100, Telecommunications company based in Schaumburg Illinois.
The original attempt for a North American 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. PrimeStar was a US direct broadcast satellite broadcasting company formed in 1991 by a consortium of cable television system operators Direct broadcast satellite (DBS is a term used to refer to Satellite television broadcasts intended for home reception also referred to more broadly as direct-to-home The 1990s collectively refers to the years between and including 1990 and 1999 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. For the chemical compound see Divinylbenzene. Digital Video Broadcasting ( DVB) is a suite of internationally accepted
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. Digital cable is a type of Cable television distribution using Digital Video compression. 4DTV is the name of the digital TVRO Communications satellite receiver technology manufactured by Motorola for use with large-diameter parabolic dish antennas 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 Star Choice's DBS receiver (Star Choice is based in Canada). Star Choice is a Direct broadcast satellite Television distributor in Canada which is majority-owned by Cable TV operator Shaw Communications Direct broadcast satellite (DBS is a term used to refer to Satellite television broadcasts intended for home reception also referred to more broadly as direct-to-home Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page
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