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PBS Satellite Service
The PBS Satellite Service (also known as the PBS National Program Service, with the primary C-band feed being formerly known as PBS Schedule X in Eastern Time, with the West Coast delay signal designated PBS-XP) consists of feeds relayed from PBS by satellite to public television stations throughout the United States. The service was launched in September 1978. The service provides a mixed variety of programming selected from PBS's regular network services. In the X/XP years a satellite feed was multicast by some PBS member stations on an over-the-air DTV sub-channel along with their regular programming, or during overnight hours on their main channel to provide a second opportunity for viewers to watch or record primetime programming. PBS currently utilizes two transponders on the AMC-21 satellite. Transponder 24 is a MCPC (multiple channel per carrier) which currently has seven channels uplinked from the PBS NOC (Network Operations Center) in Alexandria, VA.http://bento.cdn.pbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arlington, Virginia
Arlington County is a county in the Commonwealth of Virginia. The county is situated in Northern Virginia on the southwestern bank of the Potomac River directly across from the District of Columbia, of which it was once a part. The county is coextensive with the U.S. Census Bureau's census-designated place of Arlington. Arlington County is considered to be the second-largest "principal city" of the Washington metropolitan area, although Arlington County does not have the legal designation of independent city or incorporated town under Virginia state law. In 2020, the county's population was estimated at 238,643, making Arlington the sixth-largest county in Virginia by population; if it were incorporated as a city, Arlington would be the third most populous city in the state. With a land area of , Arlington is the geographically smallest self-governing county in the U.S., and by reason of state law regarding population density, it has no incorporated towns within its borders ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T
AT&T Inc. is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's largest telecommunications company by revenue and the third largest provider of mobile telephone services in the U.S. , AT&T was ranked 13th on the ''Fortune'' 500 rankings of the largest United States corporations, with revenues of $168.8 billion. During most of the 20th century, AT&T had a monopoly on phone service in the United States. The company began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas, Kansas, Oklahoma and Texas, through a series of mergers, it became Southwestern Bell Telephone Company in 1920, which was then a subsidiary of American Telephone and Telegraph Company. The latter was a successor of the original Bell Telephone Company founded by Alexander Graham Bell in 1877. The American Bell Telephone Company formed the American Teleph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cognizant Technology Solutions
Cognizant is an American multinational information technology services and consulting company. It is headquartered in Teaneck, New Jersey, United States. Cognizant is part of the NASDAQ-100 and trades under CTSH. It was founded as an in-house technology unit of Dun & Bradstreet in 1994, and started serving external clients in 1996. After a series of corporate re-organizations there was an initial public offering in 1998. Cognizant had a period of fast growth during the 2000s and became a ''Fortune'' 500 company in 2011; as of 2021, it is ranked 185. History Cognizant was established in 1994 in Chennai, India, as Dun & Bradstreet Satyam Software (DBSS), a 76:24 joint venture between Dun & Bradstreet and Satyam Computer Services, with Srini Raju as the founding CEO and MD. It began with 50 employees in Chennai as Dun & Bradstreet's in-house technology unit focused on implementing large-scale IT projects for Dun & Bradstreet businesses. In 1996, the company started pursuing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corporation For Public Broadcasting
The Corporation for Public Broadcasting (CPB) is an American publicly funded non-profit corporation, created in 1967 to promote and help support public broadcasting. The corporation's mission is to ensure universal access to non-commercial, high-quality content and telecommunications services. It does so by distributing more than 70 percent of its funding to more than 1,400 locally owned public radio and television stations. History The Corporation for Public Broadcasting was created on November 7, 1967, when U.S. president Lyndon B. Johnson signed the Public Broadcasting Act of 1967. The new organization initially collaborated with the National Educational Television network—which would be replaced by the Public Broadcasting Service (PBS). Ward Chamberlin Jr. was the first operating officer. On March 27, 1968, it was registered as a nonprofit corporation in the District of Columbia. In 1969, the CPB talked to private groups to start PBS, an entity intended by the CPB to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMC-3
AMC-3 (formerly GE-3) is a commercial broadcast communications satellite owned by SES World Skies, part of SES S.A. (and formerly GE Americom, then SES Americom). Launched on 4 September 1997, from Cape Canaveral, Florida, AMC-3 is a hybrid C-band / Ku-band satellite. It provides coverage to Canada, United States, Mexico, Caribbean. Located in a geostationary orbit parallel to the Yucatán Peninsula and Great Lakes, AMC-3 provides service to commercial and government customers, with programming distribution, satellite news gathering and broadcast internet capabilities. Eagle-1 In January 2017, the AMC-3 Ku-band payload was sold to Global Eagle Entertainment (GEE), a provider of satellite-based connectivity and media to mobility markets, such as passenger aircraft. GEE purchased all the capacity on the satellite to support aeronautical customers, in particular Southwest Airlines, the company's largest customer, and rebranded the satellite as Eagle-1. The satellite remains und ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telstar 401
Telstar 401 is a communications satellite owned by AT&T Corporation, which was launched in 1993, to replace Telstar 301. It was rendered inoperable by a magnetic storm in 1997. At the time of its loss it served as the home base for TV networks such as Fox Broadcasting, CBS, PBS, ABC, and UPN. The satellite is now space debris, remaining in geosynchronous orbit A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital .... References External links Gunter's Space Page - Telstar 401, 402, 402RNasa NSSDC Entry Communications satellites in geostationary orbit Spacecraft launched in 1993 {{communications-satellite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westar 1
Westar 1 was America's first domestic and commercially launched geostationary communications satellite, launched by Western Union (WU) and NASA on April 13, 1974. It was built by Hughes Aircraft, Hughes for Western Union, using the HS-333 platform of spin-stabilisation, spin-stabilized satellites. It operated until 1983. Mission Westar 1 was the first of five Westar satellites launched by Western Union from 1974 to 1982. Westar 1 was launched from Cape Canaveral on a Delta 2914 launch vehicle from Complex 17 on April 13, 1974. The launch vehicle delivered the satellite to a geosynchronous transfer orbit. After transiting to a near geosynchronous apogee, the satellite employed an apogee kick motor to raise the perigee of the orbit and reduce inclination to near-geostationary. Westars 1, 2, and 3 were 12-transponder satellites while Westar 4 and Westar 5 were launched with 24 transponders. Western Union built a Earth station, teleport in Cedar Hill, Texas, to uplink content to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MPEG-4
MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) ( ISO/IEC JTC 1/SC29/WG11) under the formal standard ISO/IEC 14496 – ''Coding of audio-visual objects''. Uses of MPEG-4 include compression of audiovisual data for Internet video and CD distribution, voice (telephone, videophone) and broadcast television applications. The MPEG-4 standard was developed by a group led by Touradj Ebrahimi (later the JPEG president) and Fernando Pereira. Background MPEG-4 absorbs many of the features of MPEG-1 and MPEG-2 and other related standards, adding new features such as (extended) VRML support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for externally specified Digital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DVB-S2
Digital Video Broadcasting - Satellite - Second Generation (DVB-S2) is a digital television broadcast standard that has been designed as a successor for the popular DVB-S system. It was developed in 2003 by the Digital Video Broadcasting Project, an international industry consortium, and ratified by ETSI (EN 302307) in March 2005. The standard is based on, and improves upon DVB-S and the electronic news-gathering (or Digital Satellite News Gathering) system, used by mobile units for sending sounds and images from remote locations worldwide back to their home television stations. DVB-S2 is designed for broadcast services including standard and HDTV, interactive services including Internet access, and (professional) data content distribution. The development of DVB-S2 coincided with the introduction of HDTV and H.264 (MPEG-4 AVC) video codecs. Two new key features that were added compared to the DVB-S standard are: * A powerful coding scheme based on a modern LDPC code. For low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MPEG-2
MPEG-2 (a.k.a. H.222/H.262 as was defined by the ITU) is a standard for "the generic video coding format, coding of moving pictures and associated audio information". It describes a combination of Lossy compression, lossy video compression and Lossy compression, lossy audio data compression methods, which permit storage and transmission of movies using currently available storage media and transmission bandwidth. While MPEG-2 is not as efficient as newer standards such as H.264/AVC and HEVC, H.265/HEVC, backwards compatibility with existing hardware and software means it is still widely used, for example in over-the-air digital television broadcasting and in the DVD-Video standard. Main characteristics MPEG-2 is widely used as the format of digital television signals that are broadcast by terrestrial television, terrestrial (over-the-air), Cable television, cable, and direct broadcast satellite Television, TV systems. It also specifies the format of movies and other programs th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DVB-S
Digital Video Broadcasting – Satellite (DVB-S) is the original DVB standard for Satellite Television and dates from 1995, in its first release, while development lasted from 1993 to 1997. The first commercial applications was by Star TV in Asia and Galaxy in Australia, enabling digitally broadcast, satellite-delivered Television to the public.DVB-S was the first DVB standard for satellite, defining the framing structure, channel coding and modulation for 11/12 GHz satellite services It is used via satellites serving every continent of the world. DVB-S is used in both Multiple Channel Per Carrier (MCPC) and Single channel per carrier modes for Broadcast Network feeds as well as for direct-broadcast satellite services like Sky (UK & Ireland) via Astra in Europe, Dish Network and Globecast in the U.S. and Bell Satellite TV in Canada. While the actual DVB-S standard only specifies physical link characteristics and framing, the overlaid transport stream delivered by DVB-S is man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DigiCipher II
DigiCipher 2, or simply DCII, is a proprietary standard format of digital signal transmission and it doubles as an encryption standard with MPEG-2/MPEG-4 signal video compression used on many communications satellite television and audio signals. The DCII standard was originally developed in 1997 by General Instrument, which then became the Home and Network Mobility division of Motorola, then bought by Google in Aug 2011, and lastly became the Home portion of the division to Arris Group, Arris. 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 direct broadcast satellite (DBS) system during the early 1990s. The DCII standard predates wide acceptance of Digital Video Broadcasting, DVB-based digital terrestrial television compression (although not cable or satellite DVB) and therefore is incompatible with the DVB standard. Approximately 70% of newer first- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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