Contents 1 History 2 Technical specifications 3 Usage 3.1 Receiver/Decoders 3.2 High definition access 3.3 Programming providers 3.4 Advantages 3.5 Disadvantages 4 References

History[edit] 4DTV technology was originally developed in 1997 (the same year that DigiCipher was developed) by General Instrument/NextLevel and Motorola, now a division of ARRIS. 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. By the time when analogue VideoCipher II channels are switched to digital, all of the remaining VCII-encrypted channels (excluding in the clear) are transitioned to DigiCipher II on all satellites that carries either in the clear or VideoCipher II/II+/RS-encrypted channels. On December 31, 2010, Motorola abandoned support for 4DTV after 13 years when it was developed. This made all of the receivers to redirect to AMC-18 (also known as W5/X4 on the 4DTV system) instead of its of other satellites that carries analog/VCII channels. On August 24, 2016, at 9:18 AM EST, Headend In The Sky (the provider for 4DTV/DigiCipher II programming) transitioned to DVB-S2 (MPEG-2/256 QAM), meaning that support for 4DTV ended on that date.[1] Comcast and Arris (now owner of Digicipher 2 technology) has ended their support for consumer c band subscription TV. There's still a HD C band consumer subscription service available from a company based in Tonasket Washington Rainier Satellite. They use the Cisco PowerVu system and provide those master feeds to backyard dish owners.

Technical specifications[edit] Main article: DigiCipher 2 § Technical specifications

Usage[edit] 4DTV is designed for C-band/Ku-band based satellite dishes (both TVRO/direct-broadcast) in conjunction with the DigiCipher II system (for digital standard definition/high definition signals) and the VideoCipher II system (for analog signals). It is also used on Canada's Shaw Direct (previously known as Star Choice). Receiver/Decoders[edit] 4DTV receivers were designed to receive analog NTSC (except the DSR-905) in the clear or VideoCipherII channels and feeds, as well as digital Digicipher 2 channels as a TVRO satellite system on both C and Ku band-powered satellite dishes. Four models are available, either new or refurbished: DSR-920 (discontinued as of 2003) DSR-921 (discontinued as of 2003) DSR-922 (made available in Fall 2000, discontinued)[1][2][3] DSR-905 (designed to work with analog 4DTV receivers and it can only receives DigiCipher II channels) (discontinued) High definition access[edit] The HDD-200 is a peripheral for 4DTV, it is used to access high definition channels via the Mult-Media Access Port. This peripheral is no longer in production. Programming providers[edit] This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2010) (Learn how and when to remove this template message) In the United States, National Programming Service, LLC (NPS) was the primary provider of subscription programming to 4DTV and C band/Ku band users. They ceased operations as of December 26, 2010 after making a controversial attempt of converting all of their customers over to Dish Network which failed. The largest providers are now Satellite Receivers, Ltd. (SRL) and Skyvision who sell programming from the Headend In The Sky (HITS) service by Comcast and will continue to do so in 2011 and beyond. The HITS services use the Comcast Subscription Authorization Center (SAC) for the channels being broadcast on the AMC 18 satellite located at 105 degrees West (W5 or X4 tile on 4DTV). In Canada, Dr. Sat is now the primary provider for HITS subscription services offered on C-Band after Satellite Communications Source ceased operations. Due to the removal of 4DTV/DigiCipher II channels on August 24, 2016, there are no more programming providers for the 4DTV in the United States and Canada. However, Shaw Direct still offers DigiCipher II programming in Canada, but not HITS programming. Advantages[edit] The 4DTV makes use of first-generation digital master feeds on several satellites and hundreds of channels. Therefore, a high quality signal is received, compared to other programming options that are typically compressed and re-uplinked. Being a C-band system, the 4DTV has the advantage of signal stability, great satellite footprint and no rainfade. This is a problem with services such as Dish Network and DirecTV satellite providers since they re-uplink on Ku and Ka bands. Disadvantages[edit] The master feeds for the many channels available can be scattered amongst multiple satellites. The actuator must slowly rotate the large dish into the desired satellite's signal path, and then a further short delay for signal acquisition and lock. This procedure makes rapid "channel surfing" impossible outside the HITS provided channels.

References[edit] ^ "DSR922 4DTV now available [sic]". Google Groups - Retrieved 2009-08-28.  ^ "2000 Satellite News". BUD & 4DTV Info ( Retrieved 2009-08-28.  ^ "DSR 922 Operator's Guide". General Instrument: Publication #468478-001, Rev B. General Instrument Corp. 2000.  v t e Digital television in North America Terrestrial Digital broadcasting ATSC tuners Digital subchannels Virtual channels Distributed transmission system Datacasting Guide Plus National Datacast UpdateLogic Metropolitan Television Alliance Grand Alliance Digital switchover All-Channel Receiver Act SAFER Act Digital channel election Set-top boxes Digital television adapter U.S. Converter Box Coupon Program legislation Analog passthrough DVD recorders Digital video recorders Digital standards ATSC Standards ATSC ATSC-M/H 8VSB A-VSB E-VSB PSIP PMCP full list Standard-definition TV 480i 576i Enhanced-definition TV 480p 576p High-definition TV 720p 1080i 1080p Ultra high-definition TV 2160p Serial digital interface Smart antennas CEA-909 Digital networks see Template:American broadcast television Template:Canadian television networks National deployment List by country Canada Mexico United States HDTV transition wireless spectrum auction Cable Digital cable Digital-cable-ready TV QAM tuners Interactive-digital-cable-ready TV OpenCable Application Platform Encryption Must-carry Subscription TV AllVid CableCARD Downloadable Conditional Access System Tru2way Satellite TV DVB-S Dish Network GlobeCast World TV Free-to-air receiver Bell TV/Telus Satellite TV Dish México DigiCipher 2 4DTV Shaw Direct Digital Satellite Service/DVB-S2 DirecTV IPTV AT&T U-verse Bell Fibe TV FibreOP Telus Optik TV Technical issues 14:9 Active Format Description Broadcast flag Channel protection ratios HDTV blur Hierarchical modulation Pirate decryption Standards conversion Video on demand v t e Cable, satellite, and other speciality television providers in the Americas v t e Cable, satellite, and other specialty television providers in Canada Terrestrial and satellite Satellite Bell TV Shaw Direct Telus Satellite TV Cable Major1 Bell (Cablevision for Val-d'Or, QC, MTS for Manitoba) Cogeco (Ontario, Quebec) EastLink (Atlantic, Northern Ontario, Western Canada) Look Communications Rogers Cable (Ontario, New Brunswick, Newfoundland) Source (Hamilton, ON) Shaw (Western Canada, Northwestern Ontario) Vidéotron (Quebec) Minor Access (Saskatchewan) Cable Axion (Magog, QC) CityWest (Prince Rupert, BC) DERYtelecom (Saguenay, QC) Novus Cable (select areas of BC Lower Mainland) Omineca Cablevision (Prince George, BC) Westman (Brandon, MB) See also Defunct cable and DBS companies of Canada IPTV Bell Fibe(Aliant) Fibe TV(ON/QC) MTS TV(MB) Comwave SaskTel MaxTV Telus Optik TV Tbaytel Digital TV Vmedia Zazeen MMDS Craig Wireless Africa, Asia, and Oceania Americas Europe 1More than 400,000 television service subscribers. v t e Cable, satellite, and other specialty television providers in Latin America and the Caribbean Cable Axtel TV (Mexico) Airlink Communications (Trinidad and Tobago) Cablecom (Mexico) Cablemás (Mexico) Cable Onda Cablevisión (Argentina) CaboTelecom Claro Colombia Digicel Play (Caribbean) Columbus/FLOW (Caribbean) Independent Cable Network of Trinidad and Tobago (ICNTT) Izzi Telecom (Mexico) Massy Communications (Trinidad and Tobago) Mayaro Cable TV (Trinidad and Tobago) Megacable (Mexico) Movistar TV (Chile, Colombia, Peru and Venezuela) Mundo Pacifico (Chile) NET (Brazil) Oi TV (Brazil) Red Intercable (Argentina) RVR International (Trinidad and Tobago) Telefónica del Sur Tricom (Dominican Republic) TRICO Industries Limited (Trinidad and Tobago) Une (Colombia) VTR (Chile) Satellite CanalSat Caraïbes (Caribbean) CANTV (Venezuela) Claro TV DirecTV (South America & Caribbean) Dish México Entel (Chile) Green Dot (Caribbean) Inter Satélital Movistar TV (Chile, Colombia, Peru and Venezuela) Oi TV (Brazil) SKY Brasil SKY México, Dominican Republic & Central America Vivo TV (Brazil) Fiber/IPTV bmobile (Trinidad and Tobago) Claro República Dominicana Vivo TV (Brazil) Terrestrial microwave Multi-Choice TV (Barbados) Defunct satellite DirecTV Brazil DirecTV Mexico GVT TV (Brazil) Sky Argentina Sky Chile Sky Colombia Sky Ecuador Sky Peru Sky Venezuela Defunct cable Vivo TV Plus (Brazil) Africa, Asia, and Oceania Americas Canada Europe United States v t e Cable, satellite, and other specialty television providers in the United States Cable MVPD Adams Cable Altice USA Optimum Suddenlink Communications Armstrong Atlantic Broadband AT&T Alascom Blue Ridge Communications Blue Stream Broadstripe Buckeye Broadband Cable One Charter Spectrum Comcast Xfinity Comtech21 Consolidated Communications FairPoint Communications Cox Communications Deltacom DoCoMo Pacific Emery Telcom Full Channel GCI Hargray Hood Canal Communications Mediacom Midco Northlake Telecom Northland Communications Liberty Puerto Rico Ritter Communications Santel Communications Satview Broadband Service Electric Shentel SRT Communications TDS Telecom TPG Grande Communications RCN Corporation Wave Broadband TruVista Communications WOW! ZTelco Satellite MVPD Claro Dish Network DirecTV Glorystar Headend in the Sky Home2US Fiber MVPD / IPTV AT&T U-verse CenturyLink Prism TV Cincinnati Bell FiOptics Claro Consolidated Communications FairPoint Communications EPB Frontier FiOS Google Fiber GTA Teleguam Hawaiian Telcom Midco NEP Datastream TV North State Communications Smithville Fiber TDS Telecom Verizon FiOS Whidbey Telecom Windstream Kinetic Virtual MVPD DirecTV Now FuboTV Hulu with Live TV Philo PlayStation Vue Sling TV Spectrum TV Stream Xfinity Instant TV YouTube TV Over-the-top Amazon Video Anime Network Apple iTunes Store CBS All Access Crackle Crunchyroll CW Seed CuriosityStream DramaFever Fandor FunimationNow go90 Hallmark Movies Now HBO Now History Vault Hulu iON (IPTV) Lifetime Movie Club Netflix Noggin Pluto TV Roku Seeso Showtime Starz Tribeca Shortlist Tubi TV UFC Fight Pass Univision NOW YuppTV WWE Network Defunct cable Adelphia Communications Corporation Alameda Power and Telecom1 Astound Broadband AT&T Broadband MediaOne/Continental Cablevision Tele-Communications Inc. Baja Broadband US Cable Bresnan Communications Bright House Networks Cablevision Champion Broadband Cobridge Communications Community Home Entertainment Graceba Total Communications Insight Communications Jones Intercable King Videocable Knology Marcus Cable NPG Cable Paragon Cable Rapid Communications TelePrompTer/Group W Cable Time Warner Cable UA-Columbia Cablevision Windjammer Communications 1 – Still in operation, but no longer offers cable or Internet as part of its services Defunct satellite AlphaStar GlobeCast World TV PrimeStar United States Satellite Broadcasting Voom HD Networks Defunct IPTV Sky Angel Virtual Digital Cable Defunct terrestrial Aereo USDTV MovieBeam Defunct virtual MVPD CenturyLink Stream v t e Additional resources on North American television North America List of local television stations in North America DTV transition North American TV mini-template Canada Canadian networks List of Canadian television networks List of Canadian television channels List of Canadian specialty channels Local Canadian TV stations List of United States stations available in Canada 2001 Vancouver TV realignment 2007 Canada broadcast TV realignment Mexico Mexican networks Local Mexican TV stations United States American networks List of American cable and satellite networks List of American over-the-air networks Local American TV stations (W) Local American TV stations (K) Spanish-language TV networks 1994 United States broadcast TV realignment 2006 United States broadcast TV realignment List of Canadian television stations available in the United States Insular Areas TV Africa, Asia, Middle East and Oceania Americas Europe Africa, Asia, and Oceania Americas Europe Retrieved from "" Categories: Digital televisionHidden categories: Articles needing additional references from October 2011All articles needing additional referencesArticles needing additional references from December 2010

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