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Virtual Channel
In most telecommunications organizations, a virtual channel is a method of remapping the ''program number'' as used in H.222 Program Association Tables and Program Mapping Tables to a channel number that can be entered as digits on a receiver's remote control. Often, virtual channels are implemented in digital television to help users select channels easily and in general to ease the transition from analogue to digital broadcasting. Assigning virtual channels is most common where TV stations were colloquially named after the RF channel they were transmitting on ("Channel 6 Springfield"), as was common in North America during the analogue TV era. In other parts of the world, such as Europe, virtual channels are rarely used or needed, because TV stations there identify themselves by name, not by RF channel or callsign. A "virtual channel" was first used for DigiCipher 2 in North America. It was later called a logical channel number (LCN) and used for private European Digital V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telecommunications
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of transmission may be divided into communication channels for multiplexing, allowing for a single medium to transmit several concurrent Session (computer science), communication sessions. Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the electrical telegraph, telegraph, telephone, television, and radio. Early telecommunication networks used metal wires as the medium for transmitting signals. These networks were used for telegraphy and telephony for many decades. In the first decade of the 20th century, a revolution in wireless communication began with breakthroughs including those made in radio communications by Guglielmo Marconi, who won the 1909 Nobel Prize in Physics. Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seven-segment Display
A seven-segment display is a display device for Arabic numerals, less complex than a device that can show more characters such as dot matrix displays. Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information. History Seven-segment representation of figures can be found in patents as early as 1903 (in ), when Carl Kinsley invented a method of telegraphically transmitting letters and numbers and having them printed on tape in a segmented format. In 1908, F. W. Wood invented an 8-segment display, which displayed the number 4 using a diagonal bar (). In 1910, a seven-segment display illuminated by incandescent bulbs was used on a power-plant boiler room signal panel. They were also used to show the dialed telephone number to operators during the transition from manual to automatic telephone dialing. They did not achieve widespread use until the advent of light-emitting diode, LEDs in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Telecommunications Institute
The Federal Telecommunications Institute (Spanish Language, Spanish: ''Instituto Federal de Telecomunicaciones''; abbreviated as IFT and incorrectly referred to as IFETEL, Tzeltal language, Tzeltal: ''Snaul jtsob a’telelil Sk’asesojibal k’op Ayejetik ta ch’ajantak’inetik'', Qʼeqchiʼ language, Q’eqchi: ''Rochochil li Xna’ li K´iila Puktesib´aal'', Ixcatlán Mazatec: ''Ndo̱bo̱a̱ Xtitjón xi chji̱a̱ni ni xi tsꞌentsójó eén'', Kiliwa language, Kiliwa: ''Pakutiy tuchatu te-e ñam pjkai'', Chuj language, Chuj: ''Instituto Yik yajal k’en Alumel ab’ix'') is an independent government agency of Mexico charged with the regulation of telecommunications and broadcasting services. It was formed on September 10, 2013, as part of larger reforms to Mexican telecom regulations, and replaced the Federal Commission of Telecommunications (Mexico), Federal Telecommunications Commission (Cofetel). The current president of the IFT is Gabriel Oswaldo Contreras Saldívar. Hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grupo Imagen
Grupo Imagen S.A.B. de C.V., commonly known as Imagen, is a Mexican media conglomerate owned by Grupo Empresarial Ángeles. As of 2016, it is the third-largest mass media company in Mexico after Televisa and TV Azteca. History Grupo Imagen traces its roots to the foundation of XEDA-AM on June 18, 1936. This station was acquired by José Luis Fernández Soto in 1962, and in the same year, Fernández Soto founded "Grupo Imagen Comunicación en Radio", which became the operator of XEDA-AM and XEDA-FM. In 1963, Grupo Imagen doubled in size with the acquisition of Radio Metropolitana and its XELA- AM- FM cluster. With these four stations, Grupo Imagen began to form a wide range of programming. While XEDA-FM remained Imagen's flagship with a talk format and XELA-AM continued with its longtime classical music programming, the other two stations changed programming concepts often. In the 1980s, XELA-FM became XHDL-FM "Dial FM", changing formats to rock as "Radioactivo" in the 1990s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monterrey
Monterrey (, , abbreviated as MtY) is the capital and largest city of the northeastern Mexican state of Nuevo León. It is the ninth-largest city and the second largest metropolitan area, after Greater Mexico City. Located at the foothills of the Sierra Madre Oriental, Monterrey is a major business and industrial hub in North America. The city anchors the Monterrey metropolitan area, the second-largest in Mexico with an estimated population of 5,341,171 people as of 2020 and it is also the second-most productive metropolitan area in Mexico with a GDP (purchasing power parity, PPP) of US$140 billion in 2015. According to the 2020 census, Monterrey itself has a population of 1,142,194. Monterrey is considered one of the most livable cities in Mexico, and a 2018 study ranked the suburb of San Pedro Garza García as the city with the best quality of life in the country. It serves as a commercial center of northern Mexico and is the base of many significant international corporations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XHMNU-TDT
XHMNU-TDT is an educational television station owned and operated by the Universidad Autónoma de Nuevo León (UANL) in Monterrey, Nuevo León, Mexico. Programming on XHMNU generally consists of educational telecourse programs for UANL students, plus public affairs, documentary and cultural programming. History XHMNU-TV was one of the first university-run broadcast stations in Mexico, signing on channel 53 in June 1990 under the auspices of the School of Mechanical and Electrical Engineering at UANL. Its purpose was to serve as a field laboratory for students studying communications engineering. Its transmitter was located on the third floor of the Center for Design and Maintenance of Instruments, and its signal only reached a radius of from the site. The station's first broadcast was a message from Governor Jorge Treviño Martínez. Programming was supplied by other schools, such as the School of Communication and of Philosophy and Letters. The Central Directorate for Audiovis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WHDH (TV)
WHDH (channel 7) is an independent television station in Boston, Massachusetts, United States. It is owned by Sunbeam Television alongside Cambridge-licensed CW affiliate WLVI (channel 56). WHDH and WLVI share studios at Bulfinch Place (near Bowdoin Square and Government Center) in downtown Boston; through a channel sharing agreement, the two stations transmit using WHDH's spectrum from the WHDH-TV tower in Newton, Massachusetts.Network Affiliation of WHDH 7 tviv.org/WHDH From 1982 to 1995, WHDH was Boston's CBS affiliate, inheriting the affiliation from its predecessor on channel 7, . On January 2, 1995, WHDH swit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WLVI
WLVI (channel 56) is a television station licensed to Cambridge, Massachusetts, United States, serving the Boston area as an affiliate of The CW. It is owned by Sunbeam Television alongside WHDH (channel 7), an independent station. WLVI and WHDH share studios at Bulfinch Place (near Government Center) in downtown Boston; through a channel sharing agreement, the two stations transmit using WHDH's spectrum from the WHDH-TV tower in Newton, Massachusetts. Channel 56 is Boston's oldest UHF station, with roots dating to 1953 and having been in continuous operation since 1966. In addition to syndicated entertainment programs, the station was notable for producing a variety of local children's and sports programs, and in the late 1960s and between 1984 and 2006, it produced local newscasts. History WTAO-TV On December 19, 1952, the Middlesex Broadcasting Company, owners of WTAO (740 AM) and WXHR (96.9 FM), applied for a construction permit to build a new television station in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunbeam Television
Sunbeam Television Corporation is a privately held broadcasting company based in Miami, Florida, that owns three television stations in the United States. Since the company's founding in 1953, it has been under the control of the Ansin family. History Sunbeam Television was founded on December 16, 1953, by Sidney Ansin, who inherited his family's shoemaking business in Massachusetts and later purchased South Florida real estate in the years after World War II, eventually settling in Miami Beach. Ansin's company was formed as one of five bidders for the channel 7 license in Miami, with sons Ronald and Edmund Ansin included as they had expressed interest in television themselves. While Biscayne Television Corporation, a three-way partnership between newspaper publishers James M. Cox and John S. Knight, along with former NBC president Niles Trammell, won the bidding process with the Federal Communications Commission (FCC) and signed on WCKT, their license was ultimately revoked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channel 37
Channel 37 is an intentionally unused UHF television broadcasting, ultra-high frequency (UHF) television broadcasting channel by countries in most of ITU region 2 such as the United States, Canada, Mexico and Brazil. The frequency range allocated to this channel is important for radio astronomy, so all broadcasting is prohibited within a window of frequencies centered typically on . Similar reservations exist in portions of the Eurasian and Asian regions, although the channel numbering varies. History Channel 37 in CCIR System M, System M and N countries occupied a band (radio), band of UHF frequencies from . This band is particularly important to radio astronomy because it allows observation in a region of the spectrum in between the dedicated frequency allocations near 410 MHz and 1.4 GHz. The area reserved or unused differs from nation to nation and region to region (as for example the EU and British Isles have slightly different reserved frequency areas). One radio ast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channel 1 (NTSC-M)
In North American broadcast television frequencies, channel 1 was a former broadcast ( over-the-air) television channel which was removed from service in 1948. During the experimental era of TV operation, Channel 1 was moved around the lower VHF spectrum repeatedly, with the entire band displaced upward at one point due to an early 40 MHz allocation for the FM broadcast band. After FM was moved to its current frequencies in 1946, TV Channel 1's last assigned band was 44 to 50 MHz. This allocation was short-lived. Until 1948, Land Mobile Radio and television broadcasters shared the same frequencies, which caused interference. This shared allocation was eventually found to be unworkable, so the FCC reallocated the Channel 1 frequencies for public safety and land mobile use and assigned TV channels 2–13 exclusively to broadcasters. Aside from the shared frequency issue, this part of the VHF band was (and to some extent still is) prone to higher levels of radio-frequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WDPN-TV
WDPN-TV (channel 2) is a television station licensed to Wilmington, Delaware, United States, serving the Philadelphia television market as an affiliate of the classic television network MeTV. It is owned by Maranatha Broadcasting Company alongside Allentown, Pennsylvania–licensed independent station WFMZ-TV (channel 69). The two stations share studios on East Rock Road on South Mountain in Allentown; WDPN's transmitter is located in the Roxborough section of Philadelphia. History WDPN-TV's origins lie in a construction permit granted to Ambassador Media in 1988 for a Jackson, Wyoming, satellite station of its ABC affiliate in Pocatello, Idaho, KPVI. The new station, which signed on January 9, 1991, as KJVI, served as a semi-satellite of KPVI for the Wyoming side of the Idaho Falls–Pocatello market, airing separate commercials. KPVI and KJVI were sold to Sunbelt Communications Company in November 1995, who switched the stations to NBC in January 1996. Channel 2's call l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
