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Television Systems Before 1940
A number of experimental and broadcast pre World War II television systems were tested. The first ones were mechanical based (mechanical television) and of very low resolution, sometimes with no sound. Later TV systems were electronic ( electronic television). For a list of mechanical system tests and development, see mechanical television. For a station list see Prewar television stations France * France 1930 (mechanical): 30 lines, 12.5 frame/s * France 1932 (mechanical): 60 lines, 12.5 frame/s, 3:7 vertical aspect ratio, vertical scanning ~35×60 pixels per frame, sound, live images * France 1935-1936 (electronic): 180 lines * France 1937-1939 (electronic): 455 lines, developed by Rene Barthelemy * France 1943-1956 (electronic): 441 lines Germany * Doberitz 1932 (mechanical): 48 lines, 25 frame/s, 4:3 horizontal aspect ratio, ~64×48 pixels per frame, sound, talking movies * Berlin R.P.Z. 1932 (mechanical): 60 lines, 25 frame/s, 4:3 horizontal aspect ratio, ~83×60 pixe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TV Introduction Map
Television (TV) is a telecommunications, telecommunication media (communication), medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of signal transmission, transmission. Television is a mass media, mass medium for advertising, entertainment, news, and sports. The medium is capable of more than "radio broadcasting", which refers to an audio signal sent to radio receivers. Television became available in crude experimental forms in the 1920s, but only after several years of further development was the new technology marketed to consumers. After World War II, an improved form of black-and-white television broadcasting became popular in the United Kingdom and the United States, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing public opinion.Diggs-Brown, Barbara (2011''Strategic Public Relations: Audi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
405-line Television System
The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. The number of television lines influences the image resolution, or quality of the picture. It was introduced with the BBC Television Service in 1936, suspended for the duration of World War II, and remained in operation in the UK until 1985. It was also used between 1961 and 1982 in Ireland, as well as from 1957 to 1973 for the Rediffusion Television cable service in Hong Kong. 405-line was approved as System A in the CCIR assignment of broadcast systems. Sometimes called the Marconi-EMI system, it was developed in 1934 by the EMI Research Team led by Isaac Shoenberg. The figure of 405 lines had been chosen following discussions over Sunday lunch at the home of Alan Blumlein. The system used interlacing; EMI had been experimenting with a 243-line all-electronic interlaced system since 1933. In the 405 system the scanning l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographical Usage Of Television
The geographical usage of television varies around the world with a number of different transmission standards in use and differing approaches by government in relation to ownership and programme content. African networks and stations Despite being the most economically advanced country on the continent, South Africa did not introduce TV until 1976, owing to opposition from the apartheid regime. Nigeria was one of the first countries in Africa to introduce television, in 1959, followed by Zimbabwe (then Rhodesia) in 1961, while Zanzibar was the first in Africa to introduce colour television, in 1973. (Tanzania itself did not introduce television until 1994). The main satellite TV providers are the South African MultiChoice DStv service, and the predominantly French language Canal Horizons, owned by France's Canal+. Asian networks and stations In Asia, television has traditionally been state-controlled, although the number of private stations is increasing, as is competition fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timeline Of The Introduction Of Colour Television In Countries
This is a list of when the first color television broadcasts were transmitted to the general public. Non-public field tests, closed-circuit demonstrations and broadcasts available from other countries are not included, while including dates when the last black-and-white stations in the country switched to color or shutdown all black-and white television sets, which has been highlighted in red. This list also includes nations subdivisions. List in alphabetical order by country and territory :''Note: Asterisks (*) after locations below are for "Television in LOCATION" links.'' List of countries and territories that never had black and white television Countries and territories that never had black and white television (i.e., their first broadcasts were in color) are not included in the table above. * * * * * * * * ( Bechuanaland) * * * * * * * * * * * * * * (Swaziland) * * * * * * * * * * * * (Nyasaland) * * * * (South West Africa) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timeline Of The Introduction Of Television In Countries
This is a list of when the first publicly announced television broadcasts occurred in the mentioned countries. Non-public field tests and closed circuit demonstrations are not included. This list should not be interpreted to mean the whole of a country had television service by the specified date. For example, the United States, the United Kingdom, Germany, and the former Soviet Union all had operational television stations and a limited number of viewers by 1939. Very few cities in each country had television service. Television broadcasts were not yet available in most places. History 1920s and 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s and onwards See also * History of television * List of years in television This is a list of years in television. It lists important events in the history of television, as well as the first broadcasts of many television shows, and launches of some television channels and networks. 1920s * 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Television
The concept of television is the work of many individuals in the late 19th and early 20th centuries. Constantin Perskyi had coined the word ''television'' in a paper read to the International Electricity Congress at the Exposition Universelle (1900), World's Fair in Paris on August 24, 1900. The first practical transmissions of moving images over a radio system used mechanical rotating perforated disks to scan a scene into a time-varying signal that could be reconstructed at a receiver back into an approximation of the original image. Development of television was interrupted by the Second World War. After the end of the war, all-electronic methods of scanning and displaying images became standard. Several different standards for addition of color to transmitted images were developed with different regions using technically incompatible signal standards. Television broadcasting expanded rapidly after World War II, becoming an important mass medium for advertising, propagand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timeline Of The BBC
This is a timeline of the history of the British Broadcasting Corporation (and its predecessor, the British Broadcasting Company). 1920s * 1922 ** 18 October – The British Broadcasting Company is formed. ** 14 November – Following the closure of numerous amateur stations, the first BBC broadcasts from London (station 2LO). ** 15 November – First broadcasts from Birmingham (station 5IT) and Manchester (station 2ZY). ** 14 December – 33-year-old John Charles Walsham Reith becomes General Manager of the BBC. ** 24 December – First broadcast from Newcastle upon Tyne (station 5NO). * 1923 ** 8 January – First outside broadcast, the British National Opera Company's production of ''The Magic Flute'' from Covent Garden. ** 18 January – The UK Postmaster General grants the BBC a licence to broadcast. ** 13 February – First broadcast from Cardiff (station 5WA). ** 6 March – First broadcast from Glasgow (station 5SC). ** 6 June – Edgar Wallace makes a report on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DuMont Laboratories
Allen B. DuMont Laboratories, Inc. (printed on products as Allen B. Du Mont Laboratories, Inc., referred to as DuMont Laboratories or DuMont Labs, and DuMont on company documents) was an American television equipment manufacturer and broadcasting company. At one point it owned TV stations WABD (WNYW, FOX O&O), KCTY (defunct DuMont affiliate), W2XVT (experimental, defunct DuMont affiliate), KE2XDR (experimental, defunct DuMont affiliate), & WDTV (KDKA-TV, CBS O&O), as well as WTTG (FOX O&O), all former affiliates of its DuMont Television Network. The company was founded in 1931 in Upper Montclair, NJ, by inventor Allen B. DuMont, with its headquarters in nearby Clifton NJ. Among the company's developments were durable cathode ray tubes (CRTs) that would be used for TV and its magic eye tube. History In 1938, DuMont Labs began manufacturing televisions at a factory in nearby Passaic, New Jersey. To sell TVs, it began the DuMont Television Network in 1942, one of the earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Electric
General Electric Company (GE) was an American Multinational corporation, multinational Conglomerate (company), conglomerate founded in 1892, incorporated in the New York (state), state of New York and headquartered in Boston. Over the years, the company had multiple divisions, including GE Aerospace, aerospace, GE Power, energy, GE HealthCare, healthcare, lighting, locomotives, appliances, and GE Capital, finance. In 2020, GE ranked among the Fortune 500, ''Fortune'' 500 as the 33rd largest firm in the United States by gross revenue. In 2023, the company was ranked 64th in the Forbes Global 2000, ''Forbes'' Global 2000. In 2011, GE ranked among the Fortune 20 as the 14th most profitable company, but later very severely underperformed the market (by about 75%) as its profitability collapsed. Two employees of GE—Irving Langmuir (1932) and Ivar Giaever (1973)—have been awarded the Nobel Prize. From 1986 until 2013, GE was the owner of the NBC television network through its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles
Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, cultural center of Southern California. With an estimated 3,878,704 residents within the city limits , it is the List of United States cities by population, second-most populous in the United States, behind only New York City. Los Angeles has an Ethnic groups in Los Angeles, ethnically and culturally diverse population, and is the principal city of a Metropolitan statistical areas, metropolitan area of 12.9 million people (2024). Greater Los Angeles, a combined statistical area that includes the Los Angeles and Riverside–San Bernardino metropolitan areas, is a sprawling metropolis of over 18.5 million residents. The majority of the city proper lies in Los Angeles Basin, a basin in Southern California adjacent to the Pacific Ocean in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philco
Philco (an acronym for Philadelphia Battery Company) is an American electronics industry, electronics manufacturer headquartered in Philadelphia. Philco was a pioneer in battery, radio, and television production. In 1961, the company was purchased by Ford Motor Company, Ford and, from 1966, renamed "Philco-Ford". Ford sold the company to GTE in 1974, and it was purchased by North American Philips, Philips in 1981, which became a subsidiary of the Dutch company Philips in 1987. In North America, the Philco brand is owned by Philips. In other markets, the Philco International brand is owned by Electrolux. In the early 1920s, Philco made storage batteries, "socket power" battery eliminator units (plug-in transformers), and battery chargers. With the invention of the rectifier tube, which made it practical to power radios by electrical outlets, in 1928, Philco entered the radio business. They followed other radio makers such as RCA, Atwater-Kent, Zenith Electronics, Freshman Masterpie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the United States, with a population of 1,603,797 in the 2020 United States census, 2020 census. The city is the urban core of the Philadelphia metropolitan area (sometimes called the Delaware Valley), the nation's Metropolitan statistical area, seventh-largest metropolitan area and ninth-largest combined statistical area with 6.245 million residents and 7.379 million residents, respectively. Philadelphia was founded in 1682 by William Penn, an English Americans, English Quakers, Quaker and advocate of Freedom of religion, religious freedom, and served as the capital of the Colonial history of the United States, colonial era Province of Pennsylvania. It then played a historic and vital role during the American Revolution and American Revolutionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
