Information about 4dtv
4DTV is the name of the digital TVRO communications satellite receiver manufactured by Motorola.
DCII was originally intended to be the digital signal compression standard for digital television and audio signals beamed to North America, but cannot truly be considered a de facto standard due to the large amount of available North American DVB satellite signals.
ASTC technological ambiguities
North America is a continent [1] in the Earth's northern hemisphere and (chiefly) western hemisphere. It is bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the southeast by the Caribbean Sea, and on the south and west
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History
Since 4DTV technology was originally developed by General Instrument (now the broadband division of Motorola) in 1997, it predates DVB-based digital television compression and therefore is incompatible with the DVB standard. The DigiCipher II encryption sytem can be considered the successor to the VideoCipher & VideoCipher II encryption system.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 (which is also owned by Motorola); though the receivers are also capable of handling analog channels.DCII was originally intended to be the digital signal compression standard for digital television and audio signals beamed to North America, but cannot truly be considered a de facto standard due to the large amount of available North American DVB satellite signals.
- Approximately 70% of newer first-generation digital cable networks in North America use the 4DTV/DigiCipher 2 format.
Channel coding
4DTV digital channels use the following format:G1 100 [where "G1" is the special two-character satellite abbreviation and "100" is the arbitrary three-digit channel number assigned to a specific channel on a particular satellite]
Decoders
4DTV receivers are also designed to receive any remaining analog TVRO satellite channels and feeds. There are three models available either new or second-hand: the DSR-920(which is discontinued as of 2003), the DSR-922, and the DSR-905 sidecar, which is slaved to an analog satellite receiver and can only receive digital 4DTV channels. The DSR-905 requires the use of an additional receiver to be used as a dish mover. The high cost of these receivers (typically in the $300-$700 range) can possibly be considered one of the factors that has contributed to rapidly falling subscriber numbers on the 4DTV platform.High Definition Access
The HDD200 receiver interfaces with the 4DTV receiver via the MMAP (Multi-Media Access Port,) allowing access to several high definition channels available on the 4DTV system. This unit is no longer in production, however.Programming Providers
In the U.S., National Programming Service, LLC (Also known as NPS,) is the primary provider of subscription programming to 4DTV and C-Band/Ku-Band users. The 2nd largest is Satellite Receivers, Ltd. (Also known as SRL.) NPS is the only programmer which uplinks any content for it's subscribers, whereas SRL makes use of existing channels that are available.Advantages
The 4DTV system's main selling point was that it makes use of first-generation master feeds of channels. Therefore, a higher quality signal is achieved vs. other programming options that typically is reuplinked. So many channels on the platform come straight from the programmer to the home user. Dish and DirecTV are all second-generation feeds along with cable.Technological obsolescene
Due to DVB technology replacing older high level (proprietary) MPEG transmission systems globally -- it can only be assumed that 4DTV will probably become fully obsolete by 2010. There is no industry-wide timetable in North America for the conversion from 4DTV to DVB.ASTC technological ambiguities
- ATSC datastreams are a subset of DVB datastreams
- ATSC cannot be carried on 4DTV, except as DATA
- 4DTV conditional access is now considered trailing edge, although it is unclear if any 4DTV transmissions were ever broken.
External links
Manufacturer related Technology related Television receive-only, or TVRO is a term used in North America to refer to the reception of satellite television from FSS-type satellites, generally on C-band analogue; free-to-air and unconnected to a commercial DBS provider.
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communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications. Modern communications satellites use a variety of orbits including geostationary orbits, Molniya orbits, other elliptical orbits
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Motorola Inc.
Public (NYSE: MOT )
Founded 1928
Headquarters Schaumburg, Illinois, USA
Key people Edward Zander, CEO & Chairman
Industry Telecommunications
Products Embedded systems
Microprocessors
Mobile phones
Two-Way radios
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Public (NYSE: MOT )
Founded 1928
Headquarters Schaumburg, Illinois, USA
Key people Edward Zander, CEO & Chairman
Industry Telecommunications
Products Embedded systems
Microprocessors
Mobile phones
Two-Way radios
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General Instrument (GI) was a diversified electronics manufacturer based in Chicago, USA, which specialized in semiconductors and cable television equipment. The company was active until 1997, when it split into General Semiconductor (power semiconductors), CommScope
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20th century - 21st century
1960s 1970s 1980s - 1990s - 2000s 2010s 2020s
1994 1995 1996 - 1997 - 1998 1999 2000
Year 1997 (MCMXCVII
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1960s 1970s 1980s - 1990s - 2000s 2010s 2020s
1994 1995 1996 - 1997 - 1998 1999 2000
Year 1997 (MCMXCVII
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DVB, short for Digital Video Broadcasting, is a suite of internationally accepted open standards for digital television. DVB standards are maintained by the DVB Project, an industry consortium with more than 270 members, and they are published by a
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Television (often abbreviated to TV, T.V., or more recently, tv; sometimes called telly, the tube, boob tube, or idiot box in British English) is a widely used telecommunication system for broadcasting and receiving moving pictures
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The of this article or section may be compromised by "weasel words".
You can help Wikipedia by removing weasel words. Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television.
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You can help Wikipedia by removing weasel words. Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television.
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DigiCipher 2, or simply DCII, is a digital signal compression standard used on many communications satellite television and audio signals. The DCII standard was originally developed in 1997 by General Instrument, which is now the broadband division of Motorola.
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North America is a continent [1] in the Earth's northern hemisphere and (chiefly) western hemisphere. It is bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the southeast by the Caribbean Sea, and on the south and west
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