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Narrowband Television
Narrow-bandwidth television (NBTV) is a type of television designed to fit into a channel narrower than the standard bandwidth used for official television standards. The three predominant worldwide broadcast television standards use either 6 MHz wide channels (as in the Americas and Japan, as ATSC and ISDB-T both use those standards) or 8 MHz (as in most of Europe with DVB-T). Narrow-bandwidth television refers to any method that reduces the bandwidth below that threshold. (These techniques are frequently used in traditional television to allow for multiple digital subchannels on the same bandwidth, but this is not true narrow-bandwidth as the standards do not allow for it, and the extra bandwidth in these cases is usually transferred to another channel.) Design There are three ways to reduce the bandwidth of a video signal: reduce the scan rate, reduce the image size, and/or (with digital television) use heavier compression. When the scan rate is reduced, this i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Television
Television, sometimes shortened to TV, is a telecommunication medium for transmitting moving images and sound. The term can refer to a television set, or the medium of television transmission. Television is a mass medium for advertising, entertainment, news, and sports. Television became available in crude experimental forms in the late 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: Audience Focused Practice''p. 48 In the mid-1960s, color broadcasting was introduced in the U.S. and most other developed countries. The availability of various types of archival st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Television
Mechanical television or mechanical scan television is a television system that relies on a mechanical scanning device, such as a rotating disk with holes in it or a rotating mirror drum, to scan the scene and generate the video signal, and a similar mechanical device at the receiver to display the picture. This contrasts with vacuum tube electronic television technology, using electron beam scanning methods, for example in cathode ray tube (CRT) televisions. Subsequently, modern solid-state liquid-crystal displays (LCD) are now used to create and display television pictures. Mechanical-scanning methods were used in the earliest experimental television systems in the 1920s and 1930s. One of the first experimental wireless television transmissions was by John Logie Baird on October 2, 1925, in London. By 1928 many radio stations were broadcasting experimental television programs using mechanical systems. However the technology never produced images of sufficient quality to become ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moving Image Formats
This article discusses moving image capture, transmission and presentation from today's technical and creative points of view; concentrating on aspects of frame rates. Essential parameters The essential parameters of any moving image sequence as a visual presentation are: presence or absence of colour, aspect ratio, resolution and image change rate. Image change rate There are several standard image-change rates (or frame rates) used today: 24 Hz, 25 Hz, 30 Hz, 50 Hz, and 60 Hz. Technical details related to the backward-compatible addition of color to the NTSC signal caused other variants to appear: 24000/1001 Hz, 30000/1001 Hz, and 60000/1001 Hz. The image change rate fundamentally affects how "fluid" the motion it captures will look on the screen. Moving image material, based on this, is sometimes divided into two groups: ''film-based'' material, where the image of the scene is captured by camera 24 times a second (24 Hz), and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Experimental Television Stations
This page is a list of the experimental television stations before 1946. After 1945 (in the United States) the television frequencies were opened up to commercialization and regular broadcasts began. Regular broadcast television start dates vary widely by country; in many regions, initial broadcast video deployment was delayed due to mobilisation for World War II. (Note: The listing of current broadcast channels for these stations is not up-to-date as many low-VHF stations have moved to UHF frequencies as a result of digital television transition. This is less of an issue in the United Kingdom because of its all-UHF system, but most early US broadcasters were on affected channels before analogue shutdown. Very few full-service North American broadcasters remain on physical channels VHF 2-6 digitally due to impulse noise problems and strict limits on maximum transmitted power at these frequencies.) Television stations, as of 1928 Television stations, from 1928 to 1939 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Television
The concept of television was the work of many individuals in the late 19th and early 20th centuries. 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 media, mass medium for advertising, propaganda, and entertainment. Television broadcasts can be distributed over the air by VHF and UHF radio signals from terrestrial transmitting stations, by microwave signals from Earth orbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KCBS-TV
KCBS-TV (channel 2) is a television station in Los Angeles, California, United States, serving as the West Coast flagship of the CBS network. It is owned and operated by the network's CBS News and Stations division alongside independent outlet KCAL-TV (channel 9). Both stations share studios at the CBS Studio Center on Radford Avenue in the Studio City section of Los Angeles, while KCBS-TV's transmitter is located on the western side of Mount Wilson near Occidental Peak. Aside from being affiliated with CBS News, since 2017, KCBS-TV has had no connection to KCBS radio (740 AM) in San Francisco. The 2017 sale to Entercom (now Audacy) of KCBS radio and KCBS-FM (93.1) in Los Angeles ended almost seven decades of co-ownership among the three stations under CBS. History Early years (1931–1948) KCBS-TV is the oldest continuously operating television station in the western United States. It was signed on by Don Lee Broadcasting, which owned a chain of radio stations on the P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WCFL (AM)
WMVP (1000 AM) is a commercial radio station licensed to Chicago, Illinois, carrying a sports format. Owned by Good Karma Brands, the station serves the Chicago metro area as the market affiliate of ESPN Radio, the flagship station of the Chicago White Sox and the Chicago Wolves (the AHL affiliate of the NHL's Carolina Hurricanes) and is the home of local personalities David Kaplan, Tom Waddle and John Jurkovic. Formerly an ESPN Radio owned-and-operated station, WMVP's studios are co-located with WLS-TV in the Chicago Loop while the transmitter is located in Downers Grove. In addition to a standard analog transmission, WMVP is simulcast over the second HD subchannel of WSHE-FM and is available online. From 1926 to 1987, 1000 AM was WCFL, the radio voice of the Chicago Federation of Labor. WMVP is a Class A radio station, broadcasting at 50,000 watts, the maximum power for commercial AM stations. It shares 1000 AM, a clear channel frequency, with KNWN in Seattle and XEOY ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epsom Derby
The Derby Stakes, also known as the Epsom Derby or the Derby, and as the Cazoo Derby for sponsorship reasons, is a Group 1 flat horse race in England open to three-year-old colts and fillies. It is run at Epsom Downs Racecourse in Surrey on the first Saturday of June each year, over a distance of one mile, four furlongs and 6 yards (2,420 metres). It was first run in 1780. It is Britain's richest flat horse race, and the most prestigious of the five Classics. It is sometimes referred to as the "Blue Riband" of the turf. The race serves as the middle leg of the historically significant Triple Crown of British horse racing, preceded by the 2000 Guineas and followed by the St Leger, although the feat of winning all three is rarely attempted in the modern era due to changing priorities in racing and breeding, and the demands it places on horses. The name "Derby" (deriving from the sponsorship of the Earl of Derby) has been borrowed many times, notably by the Kentucky D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WRNY (New York City)
WRNY was a New York City AM radio station that began operating in 1925. It was started by Hugo Gernsback's Experimenter Publishing Company to promote his radio and science magazines. Starting in August 1928, WRNY was one of the first stations to make regularly scheduled experimental television broadcasts. Experimenter Publishing went bankrupt in early 1929 and the station was purchased by the Curtiss Aeroplane and Motor Company to promote aviation. WRNY was deleted in 1934, as part of a consolidation on its shared frequency by surviving station WHN (now WEPN). History Origin Hugo Gernsback was born in Luxembourg and studied electrical engineering in Germany. In 1904 at age 20, Gernsback emigrated to the United States to sell his automotive battery design and to start a mail order radio and electrical components business. The Electro Importing Company catalog soon grew into a magazine, ''Modern Electrics''. The Experimenter Publishing Company was started in 1915 and by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Press-Enterprise
''The Press-Enterprise'' is a paid daily newspaper published by Digital First Media that serves the Inland Empire in Southern California. Headquartered in downtown Riverside, California, it is the primary newspaper for Riverside County, with heavy penetration into neighboring San Bernardino County. The geographic circulation area of the newspaper spans from the border of Orange County to the west, east to the Coachella Valley, north to the San Bernardino Mountains, and south to the San Diego County line. ''The Press-Enterprise'' is a member of the Southern California News Group. The newspaper traces its roots to ''The Press'', which began publishing in 1878, and ''The Daily Enterprise'', which started publishing in 1885. The two papers were merged into one company in 1931, but the company did not begin publishing a daily morning paper named ''The Press-Enterprise'' until 1983. A. H. Belo acquired the company in 1998. In October 2013, A.H. Belo announced that it had reached a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington, D
Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on Washington, D.C. * George Washington (1732–1799), the first president of the United States Washington may also refer to: Places England * Washington, Tyne and Wear, a town in the City of Sunderland metropolitan borough ** Washington Old Hall, ancestral home of the family of George Washington * Washington, West Sussex, a village and civil parish Greenland * Cape Washington, Greenland * Washington Land Philippines *New Washington, Aklan, a municipality *Washington, a barangay in Catarman, Northern Samar *Washington, a barangay in Escalante, Negros Occidental *Washington, a barangay in San Jacinto, Masbate *Washington, a barangay in Surigao City United States * Washington, Wisconsin (other) * Fort Washington (other) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
W3XK
W3XK is widely regarded as the oldest television station in the United States. It was operated by Charles Jenkins of Charles Jenkins Laboratories from July 2, 1928 to 1934. It is believed to be the first station to broadcast to the general public. (Note, however, that in January 1928, GE began broadcasting as 2XB – later W2XB – on 790 kHz using a 24 line mechanical standard. ) The station's frequency started out at 1605 kc., but moved to 6420 kc. (6.42 Mc.), and eventually moved to the 2.-2.1 Mc. band. It broadcast from Wheaton, Maryland (just outside Washington, D.C.), at a resolution of just 48 lines. The way to view television at the time was by mechanical television sets, and this station operated in that way. See also * Bernard H. Paul * W2XB W, or w, is the twenty-third and fourth-to-last letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. It represents a consona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
