In its early stages of development, LIVESTREAM television employed a combination of optical, mechanical and electronic technologies to capture, transmit and display a visual image. By the late 1920s, however, those employing only optical and electronic technologies were being explored. All modern television systems relied on the latter, although the knowledge gained from the work on electromechanical systems was crucial in the development of fully electronic television.
The first images transmitted electrically were sent by early mechanical fax machines, including the pantelegraph, developed in the late nineteenth century. The concept of electrically powered transmission of television images in motion was first sketched in 1878 as the telephonoscope, shortly after the invention of the telephone. At the time, it was imagined by early science fiction authors, that someday that light could be transmitted over copper wires, as sounds were.
The idea of using scanning to transmit images was put to actual practical use in 1881 in the pantelegraph, through the use of a pendulum-based scanning mechanism. From this period forward, scanning in one form or another has been used in nearly every image transmission technology to date, including television. This is the concept of "rasterization", the process of converting a visual image into a stream of electrical pulses.
In 1884, Paul Gottlieb Nipkow, a 23-year-old university student in Germany, patented the first electromechanical television system which employed a scanning disk, a spinning disk with a series of holes spiraling toward the center, for rasterization. The holes were spaced at equal angular intervals such that, in a single rotation, the disk would allow light to pass through each hole and onto a light-sensitive selenium sensor which produced the electrical pulses. As an image was focused on the rotating disk, each hole captured a horizontal "slice" of the whole image.
Nipkow's design would not be practical until advances in amplifier tube technology became available. Later designs would use a rotating mirror-drum scanner to capture the image and a cathode ray tube (CRT) as a display device, but moving images were still not possible, due to the poor sensitivity of the selenium sensors. In 1907, Russian scientist Boris Rosing became the first inventor to use a CRT in the receiver of an experimental television system. He used mirror-drum scanning to transmit simple geometric shapes to the CRT.
Using a Nipkow disk, Scottish inventor John Logie Baird succeeded in demonstrating the transmission of moving silhouette images in London in 1925, and of moving, monochromatic images in 1926. Baird's scanning disk produced an image of 30 lines resolution, just enough to discern a human face, from a double spiral of Photographic lenses. This demonstration by Baird is generally agreed to be the world's first true demonstration of television, albeit a mechanical form of television no longer in use. Remarkably, in 1927, Baird also invented the world's first video recording system, "Phonovision": by modulating the output signal of his TV camera down to the audio range, he was able to capture the signal on a 10-inch wax audio disc using conventional audio recording technology. A handful of Baird's 'Phonovision' recordings survive and these were finally decoded and rendered into viewable images in the 1990s using modern digital signal-processing technology.
In 1926, Hungarian engineer Kálmán Tihanyi designed a television system utilizing fully electronic scanning and display elements, and employing the principle of "charge storage" within the scanning (or "camera") tube.
On 25 December 1926, Kenjiro Takayanagi demonstrated a television system with a 40-line resolution that employed a CRT display at Hamamatsu Industrial High School in Japan. This was the first working example of a fully electronic television receiver. Takayanagi did not apply for a patent. By 1927, Russian inventor Léon Theremin developed a mirror-drum-based television system which used interlacing to achieve an image resolution of 100 lines.
In 1927, Philo Farnsworth made the world's first working television system with electronic scanning of both the pickup and display devices, which he first demonstrated to the press on 1 September 1928.
WRGB claims to be the world's oldest television station, tracing its roots to an experimental station founded on 13 January 1928, broadcasting from the General Electric factory in Schenectady, NY, under the call letters W2XB. It was popularly known as "WGY Television" after its sister radio station. Later in 1928, General Electric started a second facility, this one in New York City, which had the call letters W2XBS, and which today is known as WNBC. The two stations were experimental in nature and had no regular programming, as receivers were operated by engineers within the company. The image of a Felix the Cat doll, rotating on a turntable, was broadcast for 2 hours every day for several years, as new technology was being tested by the engineers.At the Berlin Radio Show in August 1931, Manfred von Ardenne gave the world's first public demonstration of a television system using a cathode ray tube for both transmission and reception. The world's first electronically scanned television service then started in Berlin in 1935. In August 1936, the Olympic Games in Berlin were carried by cable to television stations in Berlin and Leipzig where the public could view the games live. In 1935, the German firm of Fernseh A.G. and the United States firm Farnsworth Television owned by Philo Farnsworth signed an agreement to exchange their television patents and technology to speed development of television transmitters and stations in their respective countries.On 2 November 1936, the BBC began transmitting the world's first public regular high-definition service from the Victorian Alexandra Palace in north London. It therefore claims to be the birthplace of television broadcasting as we know it today. In 1936, Kálmán Tihanyi described the principle of plasma display, the first flat panel display system. Mexican inventor Guillermo González Camarena also played an important role in early television. His experiments with television (known as telectroescopía at first) began in 1931 and led to a patent for the "trichromatic field sequential system" color television in 1940. Although television became more familiar in the United States with the general public at the 1939 World's Fair, the outbreak of World War II prevented it from being manufactured on a large scale until after the end of the war. True regular commercial television network programming did not begin in the U.S. until 1948. During that year, legendary conductor Arturo Toscanini made his first of ten TV appearances conducting the NBC Symphony Orchestra, and Texaco Star Theater, starring comedian Milton Berle, became television's first gigantic hit show. Since the 1950s, television has been the main medium for molding public opinion.
Amateur television (ham TV or ATV) was developed for non-commercial experimentation, pleasure and public service events by amateur radio operators. Ham TV stations were on the air in many cities before commercial TV stations came on the air. In 2012, it was reported that television revenue was growing faster than film for major media companies. LIVESTREAM ONLINE TV.
LIST OF SOME INTERNATIONAL CHANNELS
ABC (American Broadcasting Company) - based in USA, but also broadcasts into Canada and Mexico, parts of the Caribbean, and Guam.
ABC Asia Pacific (Australian Broadcasting Corporation) - based in Australia, broadcasting to the neighbouring region.
Africa Independent Television (AIT) - based in Lagos, Nigeria and broadcasts across the United Kingdom and United States.
Al Jareeah - Middle Eastern satellite TV station broadcasting to North America on Galaxy 25.
ANT1 - Greek language, broadcasts into Macedonia, Albania, parts of Italy and Turkey; international ANT1 channels broadcast ANT1 programming to North America, Europe & Australia.
ARY Digital - Pakistani channel broadcasting in Urdu available in USA, Europe, Middle East and South Asian markets.
Asian Food Channel
TV Azteca - Also known as Azteca America in the United States, based in Mexico, broadcasts throughout Latin America, United States, Canada.
AzTV - Azeri national broadcaster. Distribution to Europe, the Middle East, and North America.
BFBS - British Forces Broadcasting Service, operating BFBS Television in Germany, Cyprus, former Yugoslavia, Iraq, Falkland Islands, Belize - only available to HM Forces and their families, except in Falkland Islands, and on cable in Ralston, Alberta (home of CFB Suffield, the British Forces' Canadian home)
CBC - based in Canada, but also broadcast into part of USA, Bermuda, the Caribbean and probably Greenland.
CBS - based in USA, but also broadcasts into Canada, Mexico, parts of the Caribbean, and Guam.
Channel NewsAsia - based in Singapore with broadcasts in over 20 Asian territories.
CaribVision - based in Barbados, the international broadcaster caters mostly to the English-Speaking Caribbean-community throughout the world.
Cubavision International - International broadcaster from Cuba
The CW - Launched in the United States in September 2006 as a merger of two networks, UPN and The WB. It is also seen in Puerto Rico and the U.S. Virgin Islands.
DD India - Government-run Indian international station.
ERT World, Greek language/Greek state broadcaster, available in North America, Europe & Australia
ESPN, ESPN2 - Sports channel, based in USA
Euronews - news television, mainly broadcast in Europe
Eurosport- Sports channel, the sports equivalent of Euronews (although unrelated)
Fox, based in USA but also broadcasts into Canada, Mexico, parts of the Caribbean American Samoa, and Guam. It also has a worldwide distribution.
Fox Sports Net - several regional channels (incl. Fox Soccer Channel) devoted to sports broadcasting.
France 2 and France 3 - Major television network in France, also available on satellite in Europe, Africa and the Americas
Geo TV - Pakistani channel broadcasting in Urdu available in USA, Europe, Middle East and South Asian markets.
GMA Pinoy TV - Popular channel from the Philippines owned by Filipino broadcaster GMA Network; now available throughout the world
Hauraki TV - Available in New Zealand, Australia & South America
Indus Music - Pakistani music channel broadcasting in Urdu available in USA, Europe, Middle East and South Asian markets.
Indus Vision - Pakistani general entertainment channel broadcasting in Urdu available in USA, Europe, Middle East and South Asian markets.
ION Television - Formerly PAX and i: Independent Television. Based in USA but also broadcasts into Canada, Mexico, and parts of the Caribbean. It also has a worldwide distribution.
The Israeli Network, diffusion of Ch. 3 IL, Ch. 7 IL, and Ch. 10 IL, Mainly Hebrew language
Living Asia Channel - Channel broadcast from the Philippines to Asia, Middle East, Oceania, Europe, and North America, primarily in English
Mega Cosmos, Greek Language available in North America & Australia
MRTV3 - International channel from Myanmar.
NBC - based in USA but also broadcasts into Canada, Mexico, and parts of the Caribbean, American Samoa, the Northern Mariana Islands, Sisimiut, Greenland, and Guam. It also offers a business channel called CNBC
NDTV 24x7 - Indian news channel broadcasting in English.
NDTV Imagine - Indian entertainment channel broadcasting in Hindi.
Nickelodeon, based in the United States
Nigerian Television Authority (NTA) based in Nigeria and also broadcasts in the United Kingdom via BEN Television, in North America FTA and throughout Africa.
Polsat 2 International, Polish private network available in North America and Australia
Rusiya Al-Yaum - Russian TV news channel broadcasting in Arabic via satellites for the audience in the Arab world and European states as well as other regions.
SIC Internacional - Portuguese commercial broadcaster available in North America
Spacetoon Kids TV - Cartoon channel available in MENA Region , India , Indonesia.
STAR Gold - Hindi language movie channel from India, owned by News Corp.
STAR News - Hindi language news channel from India, owned by News Corp.
STAR One - Hindi language entertainment channel from India, owned by News Corp.
STAR Plus - Hindi language entertainment channel from India, owned by News Corp.
TF1 - French language television network based in France with international distribution
TVB - Based in Hong Kong but can be viewed in Canada, Malaysia, Singapore, UK, US, and Australia via satellite.
TV Chile - Chilean channel with international distribution.
TVK - Cambodian station with international distribution.
TVRi - Romanian state broadcaster, international distribution
UK.TV - 'Best of British' entertainment channel in Australia and New Zealand, carrying BBC, Thames Television and ITV programming
Voice of America - is a multimedia international broadcasting service funded by the U.S. Government through the Broadcasting Board of Governors. Programs are produced in 45 languages.
VMTV - Volksmusik TV is a German folc music station with European and American proragmming versions
Zee Cinema - Indian movie channel broadcasting in Hindi.