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TELEVISION or TV is a telecommunication medium used for transmitting moving images in monochrome (black-and-white ), or in color, and in two or three dimensions and sound. The term can refer to a television set , a television program ("TV show"), or the medium of television transmission . Television
Television
is a mass medium for entertainment, education , news , politics, gossip, and advertising.

Television
Television
became available in crude experimental forms in the late 1920s, but it would still be several years before the new technology was marketed to consumers. After World War II
World War II
, an improved form of black-and-white TV broadcasting became popular in the United States and Britain, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing public opinion . In the mid-1960s, color broadcasting was introduced in the US and most other developed countries. The availability of multiple types of storage media such as Betamax , VHS
VHS
tape, local disks , DVDs, flash drives , high-definition Blu-ray Discs , and digital video recorders have enabled viewers to watch prerecorded material—such as movies— at home on their own time schedule. For many reasons, the storage of television and video programming now occurs on the cloud . At the end of the first decade of the 2000s, digital television transmissions greatly increased in popularity. Another development was the move from standard-definition television (SDTV) ( 576i
576i
, with 576 interlaced lines of resolution and 480i ) to high-definition television (HDTV), which provides a resolution that is substantially higher. HDTV may be transmitted in various formats: 1080p
1080p
, 1080i
1080i
and 720p . Since 2010, with the invention of smart television , Internet television has increased the availability of television programs and movies via the Internet through streaming video services such as Netflix
Netflix
, Amazon Video
Amazon Video
, iPlayer , Hulu
Hulu
, Roku and Chromecast .

In 2013, 79% of the world's households owned a television set. The replacement of early bulky, high-voltage cathode ray tube (CRT) screen displays with compact, energy-efficient, flat-panel alternative technologies such as plasma displays , LCDs (both fluorescent-backlit and LED
LED
), and OLED
OLED
displays was a hardware revolution that began with computer monitors in the late 1990s. Most TV sets sold in the 2000s were flat-panel, mainly LEDs. Major manufacturers announced the discontinuation of CRT, DLP, plasma, and even fluorescent-backlit LCDs by the mid-2010s. In the near future, LEDs are gradually expected to be replaced by OLEDs. Also, major manufacturers have announced that they will increasingly produce smart TVs in the mid-2010s. Smart TVs with integrated Internet
Internet
and Web 2.0
Web 2.0
functions became the dominant form of television by the late 2010s.

Television
Television
signals were initially distributed only as terrestrial television using high-powered radio-frequency transmitters to broadcast the signal to individual television receivers. Alternatively television signals are distributed by coaxial cable or optical fiber , satellite systems and, since the 2000s via the Internet
Internet
. Until the early 2000s, these were transmitted as analog signals, but a transition to digital television is expected to be completed worldwide by the late 2010s. A standard television set is composed of multiple internal electronic circuits , including a tuner for receiving and decoding broadcast signals. A visual display device which lacks a tuner is correctly called a video monitor rather than a television.

CONTENTS

* 1 Etymology

* 2 History

* 2.1 Mechanical * 2.2 Electronic * 2.3 Color * 2.4 Digital * 2.5 Smart TV * 2.6 3D

* 3 Broadcast systems

* 3.1 Terrestrial television * 3.2 Cable television * 3.3 Satellite television * 3.4 Internet television

* 4 Sets

* 4.1 Display technologies

* 4.1.1 Disk * 4.1.2 CRT * 4.1.3 DLP * 4.1.4 Plasma * 4.1.5 LCD
LCD
* 4.1.6 OLED
OLED

* 4.2 Display resolution

* 4.2.1 LD * 4.2.2 SD * 4.2.3 HD * 4.2.4 UHD

* 4.3 Market share

* 5 Content

* 5.1 Programming * 5.2 Genres

* 5.3 Funding

* 5.3.1 Advertising

* 5.3.1.1 United States * 5.3.1.2 United Kingdom * 5.3.1.3 Ireland

* 5.3.2 Subscription * 5.3.3 Taxation or license

* 5.4 Broadcast programming

* 6 Social aspects

* 6.1 Consumption

* 7 Environmental aspects * 8 See also * 9 References * 10 Further reading * 11 External links

ETYMOLOGY

The word television comes from Ancient Greek τῆλε (tèle), meaning 'far', and Latin visio, meaning 'sight'. The first documented usage of the term dates back to 1900, when the Russian scientist Constantin Perskyi used it in a paper that he presented in French at the 1st International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris. The Anglicised version of the term is first attested in 1907, when it was still "...a theoretical system to transmit moving images over telegraph or telephone wires". It was "...formed in English or borrowed from French télévision." In the 19th century and early 20th century, other "...proposals for the name of a then-hypothetical technology for sending pictures over distance were telephote (1880) and televista (1904)." The abbreviation "TV" is from 1948. The use of the term to mean "a television set" dates from 1941. The use of the term to mean "television as a medium" dates from 1927. The slang term "telly" is more common in the UK. The slang term "the tube" or the "boob tube" refers to the bulky cathode ray tube used on most TVs until the advent of flat-screen TVs. Another slang term for the TV is "idiot box".

HISTORY

Main article: History of television
History of television

MECHANICAL

Main article: Mechanical television
Mechanical television
The Nipkow disk
Nipkow disk
. This schematic shows the circular paths traced by the holes that may also be square for greater precision. The area of the disk outlined in black shows the region scanned.

Facsimile transmission systems for still photographs pioneered methods of mechanical scanning of images in the early 19th century. Alexander Bain introduced the facsimile machine between 1843 and 1846. Frederick Bakewell demonstrated a working laboratory version in 1851. Willoughby Smith discovered the photoconductivity of the element selenium in 1873. As a 23-year-old German university student, Paul Julius Gottlieb Nipkow proposed and patented the Nipkow disk
Nipkow disk
in 1884. This was a spinning disk with a spiral pattern of holes in it, so each hole scanned a line of the image. Although he never built a working model of the system, variations of Nipkow's spinning-disk "image rasterizer " became exceedingly common. Constantin Perskyi had coined the word television in a paper read to the International Electricity Congress at the International World Fair in Paris on 25 August 1900. Perskyi's paper reviewed the existing electromechanical technologies, mentioning the work of Nipkow and others. However, it was not until 1907 that developments in amplification tube technology by Lee de Forest and Arthur Korn
Arthur Korn
, among others, made the design practical.

The first demonstration of the live transmission of images was by Georges Rignoux and A. Fournier in Paris in 1909. A matrix of 64 selenium cells, individually wired to a mechanical commutator , served as an electronic retina . In the receiver, a type of Kerr cell modulated the light and a series of variously angled mirrors attached to the edge of a rotating disc scanned the modulated beam onto the display screen. A separate circuit regulated synchronization. The 8x8 pixel resolution in this proof-of-concept demonstration was just sufficient to clearly transmit individual letters of the alphabet. An updated image was transmitted "several times" each second. In 1921 Edouard Belin sent the first image via radio waves with his belinograph .

In 1911, Boris Rosing and his student Vladimir Zworykin created a system that used a mechanical mirror-drum scanner to transmit, in Zworykin's words, "very crude images" over wires to the "Braun tube" (cathode ray tube or "CRT") in the receiver. Moving images were not possible because, in the scanner: "the sensitivity was not enough and the selenium cell was very laggy". Baird in 1925 with his televisor equipment and dummies "James" and "Stooky Bill" (right).

By the 1920s, when amplification made television practical, Scottish inventor John Logie Baird
John Logie Baird
employed the Nipkow disk
Nipkow disk
in his prototype video systems. On 25 March 1925, Baird gave the first public demonstration of televised silhouette images in motion, at Selfridge\'s Department Store in London. Since human faces had inadequate contrast to show up on his primitive system, he televised a ventriloquist's dummy named "Stooky Bill", whose painted face had higher contrast, talking and moving. By 26 January 1926, he demonstrated the transmission of the image of a face in motion by radio. This is widely regarded as the first television demonstration. The subject was Baird's business partner Oliver Hutchinson. Baird's system used the Nipkow disk
Nipkow disk
for both scanning the image and displaying it. A bright light shining through a spinning Nipkow disk
Nipkow disk
set with lenses projected a bright spot of light which swept across the subject. A Selenium photoelectric tube detected the light reflected from the subject and converted it into a proportional electrical signal. This was transmitted by AM radio waves to a receiver unit, where the video signal was applied to a neon light behind a second Nipkow disk
Nipkow disk
rotating synchronized with the first. The brightness of the neon lamp was varied in proportion to the brightness of each spot on the image. As each hole in the disk passed by, one scan line of the image was reproduced. Baird's disk had 30 holes, producing an image with only 30 scan lines, just enough to recognize a human face. In 1927, Baird transmitted a signal over 438 miles (705 km) of telephone line between London and Glasgow
Glasgow
.

In 1928, Baird's company (Baird Television
Television
Development Company/Cinema Television) broadcast the first transatlantic television signal, between London and New York, and the first shore-to-ship transmission. In 1929, he became involved in the first experimental mechanical television service in Germany. In November of the same year, Baird and Bernard Natan of Pathé
Pathé
established France's first television company, Télévision-Baird -Natan. In 1931, he made the first outdoor remote broadcast, of the Epsom Derby . In 1932, he demonstrated ultra-short wave television. Baird's mechanical system reached a peak of 240-lines of resolution on BBC
BBC
television broadcasts in 1936, though the mechanical system did not scan the televised scene directly. Instead a 17.5mm film was shot, rapidly developed and then scanned while the film was still wet.

An American inventor, Charles Francis Jenkins , also pioneered the television. He published an article on "Motion Pictures by Wireless" in 1913, but it was not until December 1923 that he transmitted moving silhouette images for witnesses; and it was on 13 June 1925, that he publicly demonstrated synchronized transmission of silhouette pictures. In 1925 Jenkins used the Nipkow disk
Nipkow disk
and transmitted the silhouette image of a toy windmill in motion, over a distance of five miles, from a naval radio station in Maryland to his laboratory in Washington, D.C., using a lensed disk scanner with a 48-line resolution. He was granted U.S. Patent No. 1,544,156 (Transmitting Pictures over Wireless) on 30 June 1925 (filed 13 March 1922).

Herbert E. Ives and Frank Gray of Bell Telephone
Telephone
Laboratories gave a dramatic demonstration of mechanical television on 7 April 1927. Their reflected-light television system included both small and large viewing screens. The small receiver had a 2-inch-wide by 2.5-inch-high screen. The large receiver had a screen 24 inches wide by 30 inches high. Both sets were capable of reproducing reasonably accurate, monochromatic, moving images. Along with the pictures, the sets received synchronized sound. The system transmitted images over two paths: first, a copper wire link from Washington to New York City, then a radio link from Whippany, New Jersey . Comparing the two transmission methods, viewers noted no difference in quality. Subjects of the telecast included Secretary of Commerce
Secretary of Commerce
Herbert Hoover
Herbert Hoover
. A flying-spot scanner beam illuminated these subjects. The scanner that produced the beam had a 50-aperture disk. The disc revolved at a rate of 18 frames per second, capturing one frame about every 56 milliseconds . (Today's systems typically transmit 30 or 60 frames per second, or one frame every 33.3 or 16.7 milliseconds respectively.) Television
Television
historian Albert Abramson underscored the significance of the Bell Labs demonstration: "It was in fact the best demonstration of a mechanical television system ever made to this time. It would be several years before any other system could even begin to compare with it in picture quality."

In 1928, WRGB , then W2XB, was started as the world's first television station. It broadcast from the General Electric
General Electric
facility in Schenectady, NY . It was popularly known as "WGY Television". Meanwhile, in the Soviet Union
Soviet Union
, Léon Theremin
Léon Theremin
had been developing a mirror drum-based television, starting with 16 lines resolution in 1925, then 32 lines and eventually 64 using interlacing in 1926. As part of his thesis, on 7 May 1926, he electrically transmitted, and then projected, near-simultaneous moving images on a five-foot square screen. By 1927 he achieved an image of 100 lines, a resolution that was not surpassed until May 1932 by RCA, with 120 lines. On 25 December 1926, Kenjiro Takayanagi demonstrated a television system with a 40-line resolution that employed a Nipkow disk
Nipkow disk
scanner and CRT display at Hamamatsu Industrial High School in Japan. This prototype is still on display at the Takayanagi Memorial Museum in Shizuoka University , Hamamatsu Campus. His research in creating a production model was halted by the United States after Japan lost World War II
World War II
.

Because only a limited number of holes could be made in the disks, and disks beyond a certain diameter became impractical, image resolution on mechanical television broadcasts was relatively low, ranging from about 30 lines up to 120 or so. Nevertheless, the image quality of 30-line transmissions steadily improved with technical advances, and by 1933 the UK broadcasts using the Baird system were remarkably clear. A few systems ranging into the 200-line region also went on the air. Two of these were the 180-line system that Compagnie des Compteurs (CDC) installed in Paris in 1935, and the 180-line system that Peck Television Corp. started in 1935 at station VE9AK in Montreal
Montreal
. The advancement of all-electronic television (including image dissectors and other camera tubes and cathode ray tubes for the reproducer) marked the beginning of the end for mechanical systems as the dominant form of television. Mechanical television, despite its inferior image quality and generally smaller picture, would remain the primary television technology until the 1930s. The last mechanical television broadcasts ended in 1939 at stations run by a handful of public universities in the United States.

ELECTRONIC

Main article: Video camera tube

In 1897, English physicist J. J. Thomson was able, in his three famous experiments, to deflect cathode rays, a fundamental function of the modern cathode ray tube (CRT). The earliest version of the CRT was invented by the German physicist Ferdinand Braun
Ferdinand Braun
in 1897 and is also known as the "Braun" tube. It was a cold-cathode diode , a modification of the Crookes tube , with a phosphor -coated screen. In 1906 the Germans Max Dieckmann and Gustav Glage produced raster images for the first time in a CRT. In 1907, Russian scientist Boris Rosing used a CRT in the receiving end of an experimental video signal to form a picture. He managed to display simple geometric shapes onto the screen.

In 1908 Alan Archibald Campbell-Swinton , fellow of the Royal Society (UK), published a letter in the scientific journal Nature in which he described how "distant electric vision" could be achieved by using a cathode ray tube, or Braun tube, as both a transmitting and receiving device, He expanded on his vision in a speech given in London in 1911 and reported in The Times and the Journal of the Röntgen Society. In a letter to Nature published in October 1926, Campbell-Swinton also announced the results of some "not very successful experiments" he had conducted with G. M. Minchin and J. C. M. Stanton. They had attempted to generate an electrical signal by projecting an image onto a selenium-coated metal plate that was simultaneously scanned by a cathode ray beam . These experiments were conducted before March 1914, when Minchin died, but they were later repeated by two different teams in 1937, by H. Miller and J. W. Strange from EMI , and by H. Iams and A. Rose from RCA
RCA
. Both teams succeeded in transmitting "very faint" images with the original Campbell-Swinton's selenium-coated plate. Although others had experimented with using a cathode ray tube as a receiver, the concept of using one as a transmitter was novel. The first cathode ray tube to use a hot cathode was developed by John B. Johnson (who gave his name to the term Johnson noise ) and Harry Weiner Weinhart of Western Electric , and became a commercial product in 1922.

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. The problem of low sensitivity to light resulting in low electrical output from transmitting or "camera" tubes would be solved with the introduction of charge-storage technology by Kálmán Tihanyi beginning in 1924. His solution was a camera tube that accumulated and stored electrical charges ("photoelectrons") within the tube throughout each scanning cycle. The device was first described in a patent application he filed in Hungary
Hungary
in March 1926 for a television system he dubbed "Radioskop". After further refinements included in a 1928 patent application, Tihanyi's patent was declared void in Great Britain in 1930, so he applied for patents in the United States. Although his breakthrough would be incorporated into the design of RCA
RCA
's "iconoscope " in 1931, the U.S. patent for Tihanyi's transmitting tube would not be granted until May 1939. The patent for his receiving tube had been granted the previous October. Both patents had been purchased by RCA
RCA
prior to their approval. Charge storage remains a basic principle in the design of imaging devices for television to the present day. On 25 December 1926, at Hamamatsu Industrial High School in Japan, Japanese inventor Kenjiro Takayanagi demonstrated a TV system with a 40-line resolution that employed a CRT display. This was the first working example of a fully electronic television receiver. Takayanagi did not apply for a patent.

On 7 September 1927, American inventor Philo Farnsworth
Philo Farnsworth
's image dissector camera tube transmitted its first image, a simple straight line, at his laboratory at 202 Green Street in San Francisco. By 3 September 1928, Farnsworth had developed the system sufficiently to hold a demonstration for the press. This is widely regarded as the first electronic television demonstration. In 1929, the system was improved further by the elimination of a motor generator, so that his television system now had no mechanical parts. That year, Farnsworth transmitted the first live human images with his system, including a three and a half-inch image of his wife Elma ("Pem") with her eyes closed (possibly due to the bright lighting required). Vladimir Zworykin demonstrates electronic television (1929)

Meanwhile, Vladimir Zworykin was also experimenting with the cathode ray tube to create and show images. While working for Westinghouse Electric in 1923, he began to develop an electronic camera tube. But in a 1925 demonstration, the image was dim, had low contrast, and poor definition, and was stationary. Zworykin's imaging tube never got beyond the laboratory stage. But RCA, which acquired the Westinghouse patent, asserted that the patent for Farnsworth's 1927 image dissector was written so broadly that it would exclude any other electronic imaging device. Thus RCA, on the basis of Zworykin's 1923 patent application, filed a patent interference suit against Farnsworth. The U.S. Patent Office examiner disagreed in a 1935 decision, finding priority of invention for Farnsworth against Zworykin. Farnsworth claimed that Zworykin's 1923 system would be unable to produce an electrical image of the type to challenge his patent. Zworykin received a patent in 1928 for a color transmission version of his 1923 patent application; he also divided his original application in 1931. Zworykin was unable or unwilling to introduce evidence of a working model of his tube that was based on his 1923 patent application. In September 1939, after losing an appeal in the courts, and determined to go forward with the commercial manufacturing of television equipment, RCA
RCA
agreed to pay Farnsworth US$1 million over a ten-year period, in addition to license payments, to use his patents.

In 1933, RCA
RCA
introduced an improved camera tube that relied on Tihanyi's charge storage principle. Dubbed the "Iconoscope" by Zworykin, the new tube had a light sensitivity of about 75,000 lux , and thus was claimed to be much more sensitive than Farnsworth's image dissector. However, Farnsworth had overcome his power problems with his Image Dissector through the invention of a completely unique "multipactor" device that he began work on in 1930, and demonstrated in 1931. This small tube could amplify a signal reportedly to the 60th power or better and showed great promise in all fields of electronics. Unfortunately, a problem with the multipactor was that it wore out at an unsatisfactory rate.

At the Berlin Radio Show in August 1931, Manfred von Ardenne gave a public demonstration of a television system using a CRT for both transmission and reception. However, Ardenne had not developed a camera tube, using the CRT instead as a flying-spot scanner to scan slides and film. Philo Farnsworth
Philo Farnsworth
gave the world's first public demonstration of an all-electronic television system, using a live camera, at the Franklin Institute
Franklin Institute
of Philadelphia
Philadelphia
on 25 August 1934, and for ten days afterwards. Mexican inventor Guillermo González Camarena also played an important role in early TV. His experiments with TV (known as telectroescopía at first) began in 1931 and led to a patent for the "trichromatic field sequential system" color television in 1940. In Britain, the EMI engineering team led by Isaac Shoenberg applied in 1932 for a patent for a new device they dubbed "the Emitron", which formed the heart of the cameras they designed for the BBC. On 2 November 1936, a 405-line broadcasting service employing the Emitron began at studios in Alexandra Palace , and transmitted from a specially built mast atop one of the Victorian building's towers. It alternated for a short time with Baird's mechanical system in adjoining studios, but was more reliable and visibly superior. This was the world's first regular "high-definition" television service.

The original American iconoscope was noisy, had a high ratio of interference to signal, and ultimately gave disappointing results, especially when compared to the high definition mechanical scanning systems then becoming available. The EMI team, under the supervision of Isaac Shoenberg , analyzed how the iconoscope (or Emitron) produces an electronic signal and concluded that its real efficiency was only about 5% of the theoretical maximum. They solved this problem by developing, and patenting in 1934, two new camera tubes dubbed super-Emitron and CPS Emitron . The super-Emitron was between ten and fifteen times more sensitive than the original Emitron and iconoscope tubes and, in some cases, this ratio was considerably greater. It was used for outside broadcasting by the BBC, for the first time, on Armistice Day 1937, when the general public could watch on a television set as the King laid a wreath at the Cenotaph. This was the first time that anyone had broadcast a live street scene from cameras installed on the roof of neighboring buildings, because neither Farnsworth nor RCA
RCA
would do the same until the 1939 New York World\'s Fair . Ad for the beginning of experimental television broadcasting in New York City by RCA
RCA
in 1939 Indian-head test pattern used during the black "> The production and commercialization of the super-Emitron and image iconoscope in Europe were not affected by the patent war between Zworykin and Farnsworth, because Dieckmann and Hell had priority in Germany for the invention of the image dissector, having submitted a patent application for their Lichtelektrische Bildzerlegerröhre für Fernseher (Photoelectric Image Dissector Tube for Television) in Germany in 1925, two years before Farnsworth did the same in the United States. The image iconoscope (Superikonoskop) became the industrial standard for public broadcasting in Europe from 1936 until 1960, when it was replaced by the vidicon and plumbicon tubes. Indeed, it was the representative of the European tradition in electronic tubes competing against the American tradition represented by the image orthicon. The German company Heimann produced the Superikonoskop for the 1936 Berlin Olympic Games, later Heimann also produced and commercialized it from 1940 to 1955; finally the Dutch company Philips
Philips
produced and commercialized the image iconoscope and multicon from 1952 to 1958.

American television broadcasting, at the time, consisted of a variety of markets in a wide range of sizes, each competing for programming and dominance with separate technology, until deals were made and standards agreed upon in 1941. RCA, for example, used only Iconoscopes in the New York area, but Farnsworth Image Dissectors in Philadelphia
Philadelphia
and San Francisco. In September 1939, RCA
RCA
agreed to pay the Farnsworth Television
Television
and Radio
Radio
Corporation royalties over the next ten years for access to Farnsworth's patents. With this historic agreement in place, RCA
RCA
integrated much of what was best about the Farnsworth Technology into their systems. In 1941, the United States implemented 525-line television. Electrical engineer Benjamin Adler played a prominent role in the development of television.

The world's first 625-line television standard was designed in the Soviet Union
Soviet Union
in 1944 and became a national standard in 1946. The first broadcast in 625-line standard occurred in Moscow in 1948. The concept of 625 lines per frame was subsequently implemented in the European CCIR standard. In 1936, Kálmán Tihanyi described the principle of plasma display , the first flat panel display system.

COLOR

Main article: Color television
Color television

The basic idea of using three monochrome images to produce a color image had been experimented with almost as soon as black-and-white televisions had first been built. Although he gave no practical details, among the earliest published proposals for television was one by Maurice Le Blanc, in 1880, for a color system, including the first mentions in television literature of line and frame scanning. Polish inventor Jan Szczepanik patented a color television system in 1897, using a selenium photoelectric cell at the transmitter and an electromagnet controlling an oscillating mirror and a moving prism at the receiver. But his system contained no means of analyzing the spectrum of colors at the transmitting end, and could not have worked as he described it. Another inventor, Hovannes Adamian , also experimented with color television as early as 1907. The first color television project is claimed by him, and was patented in Germany on 31 March 1908, patent № 197183, then in Britain, on 1 April 1908, patent № 7219, in France (patent № 390326) and in Russia in 1910 (patent № 17912).

Scottish inventor John Logie Baird
John Logie Baird
demonstrated the world's first color transmission on 3 July 1928, using scanning discs at the transmitting and receiving ends with three spirals of apertures, each spiral with filters of a different primary color; and three light sources at the receiving end, with a commutator to alternate their illumination. Baird also made the world's first color broadcast on 4 February 1938, sending a mechanically scanned 120-line image from Baird's Crystal Palace studios to a projection screen at London's Dominion Theatre
Dominion Theatre
. Mechanically scanned color television was also demonstrated by Bell Laboratories
Bell Laboratories
in June 1929 using three complete systems of photoelectric cells , amplifiers, glow-tubes, and color filters, with a series of mirrors to superimpose the red, green, and blue images into one full color image.

The first practical hybrid system was again pioneered by John Logie Baird. In 1940 he publicly demonstrated a color television combining a traditional black-and-white display with a rotating colored disk. This device was very "deep", but was later improved with a mirror folding the light path into an entirely practical device resembling a large conventional console. However, Baird was not happy with the design, and, as early as 1944, had commented to a British government committee that a fully electronic device would be better.

In 1939, Hungarian engineer Peter Carl Goldmark introduced an electro-mechanical system while at CBS
CBS
, which contained an Iconoscope sensor. The CBS
CBS
field-sequential color system was partly mechanical, with a disc made of red, blue, and green filters spinning inside the television camera at 1,200 rpm, and a similar disc spinning in synchronization in front of the cathode ray tube inside the receiver set. The system was first demonstrated to the Federal Communications Commission (FCC) on 29 August 1940, and shown to the press on 4 September.

CBS
CBS
began experimental color field tests using film as early as 28 August 1940, and live cameras by 12 November. NBC
NBC
(owned by RCA) made its first field test of color television on 20 February 1941. CBS began daily color field tests on 1 June 1941. These color systems were not compatible with existing black-and-white television sets, and, as no color television sets were available to the public at this time, viewing of the color field tests was restricted to RCA
RCA
and CBS engineers and the invited press. The War Production Board
War Production Board
halted the manufacture of television and radio equipment for civilian use from 22 April 1942 to 20 August 1945, limiting any opportunity to introduce color television to the general public.

As early as 1940, Baird had started work on a fully electronic system he called Telechrome . Early Telechrome devices used two electron guns aimed at either side of a phosphor plate. The phosphor was patterned so the electrons from the guns only fell on one side of the patterning or the other. Using cyan and magenta phosphors, a reasonable limited-color image could be obtained. He also demonstrated the same system using monochrome signals to produce a 3D image (called "stereoscopic " at the time). A demonstration on 16 August 1944 was the first example of a practical color television system. Work on the Telechrome continued and plans were made to introduce a three-gun version for full color. However, Baird's untimely death in 1946 ended development of the Telechrome system. Similar concepts were common through the 1940s and 1950s, differing primarily in the way they re-combined the colors generated by the three guns. The Geer tube was similar to Baird's concept, but used small pyramids with the phosphors deposited on their outside faces, instead of Baird's 3D patterning on a flat surface. The Penetron used three layers of phosphor on top of each other and increased the power of the beam to reach the upper layers when drawing those colors. The Chromatron used a set of focusing wires to select the colored phosphors arranged in vertical stripes on the tube.

One of the great technical challenges of introducing color broadcast television was the desire to conserve bandwidth , potentially three times that of the existing black-and-white standards, and not use an excessive amount of radio spectrum . In the United States, after considerable research, the National Television
Television
Systems Committee approved an all-electronic Compatible color
Compatible color
system developed by RCA
RCA
, which encoded the color information separately from the brightness information and greatly reduced the resolution of the color information in order to conserve bandwidth. The brightness image remained compatible with existing black-and-white television sets at slightly reduced resolution, while color televisions could decode the extra information in the signal and produce a limited-resolution color display. The higher resolution black-and-white and lower resolution color images combine in the brain to produce a seemingly high-resolution color image. The NTSC standard represented a major technical achievement. Color bars used in a test pattern , sometimes used when no program material is available.

Although all-electronic color was introduced in the U.S. in 1953, high prices, and the scarcity of color programming, greatly slowed its acceptance in the marketplace. The first national color broadcast (the 1954 Tournament of Roses Parade
Tournament of Roses Parade
) occurred on 1 January 1954, but during the following ten years most network broadcasts, and nearly all local programming, continued to be in black-and-white. It was not until the mid-1960s that color sets started selling in large numbers, due in part to the color transition of 1965 in which it was announced that over half of all network prime-time programming would be broadcast in color that fall. The first all-color prime-time season came just one year later. In 1972, the last holdout among daytime network programs converted to color, resulting in the first completely all-color network season.

Early color sets were either floor-standing console models or tabletop versions nearly as bulky and heavy; so in practice they remained firmly anchored in one place. The introduction of GE 's relatively compact and lightweight Porta-Color set in the spring of 1966 made watching color television a more flexible and convenient proposition. In 1972, sales of color sets finally surpassed sales of black-and-white sets. Color broadcasting in Europe was not standardized on the PAL
PAL
format until the 1960s, and broadcasts did not start until 1967. By this point many of the technical problems in the early sets had been worked out, and the spread of color sets in Europe was fairly rapid. By the mid-1970s, the only stations broadcasting in black-and-white were a few high-numbered UHF stations in small markets, and a handful of low-power repeater stations in even smaller markets such as vacation spots. By 1979, even the last of these had converted to color and, by the early 1980s, B"> A smart TV

The advent of digital television allowed innovations like smart TVs. A smart television, sometimes referred to as connected TV or hybrid TV, is a television set or set-top box with integrated Internet
Internet
and Web 2.0
Web 2.0
features, and is an example of technological convergence between computers, television sets and set-top boxes. Besides the traditional functions of television sets and set-top boxes provided through traditional broadcasting media , these devices can also provide Internet
Internet
TV, online interactive media , over-the-top content , as well as on-demand streaming media , and home networking access. These TVs come pre-loaded with an operating system.

Smart TV should not to be confused with Internet TV , Internet Protocol television (IPTV) or with Web TV . Internet television refers to the receiving of television content over the Internet
Internet
instead of by traditional systems – terrestrial, cable and satellite (although internet itself is received by these methods). IPTV
IPTV
is one of the emerging Internet television technology standards for use by television broadcasters. Web television (WebTV) is a term used for programs created by a wide variety of companies and individuals for broadcast on Internet
Internet
TV. A first patent was filed in 1994 (and extended the following year) for an "intelligent" television system, linked with data processing systems, by means of a digital or analog network. Apart from being linked to data networks, one key point is its ability to automatically download necessary software routines, according to a user's demand, and process their needs. Major TV manufacturers have announced production of smart TVs only, for middle-end and high-end TVs in 2015. Smart TVs are expected to become dominant form of television by late 2010s.

3D

Main article: 3D television
3D television

THIS SECTION NEEDS EXPANSION. You can help by adding to it . (December 2014)

3D television
3D television
conveys depth perception to the viewer by employing techniques such as stereoscopic display, multi-view display, 2D-plus-depth , or any other form of 3D display
3D display
. Most modern 3D television sets use an active shutter 3D system or a polarized 3D system , and some are autostereoscopic without the need of glasses. Stereoscopic 3D television
3D television
was demonstrated for the first time on 10 August 1928, by John Logie Baird
John Logie Baird
in his company's premises at 133 Long Acre, London. Baird pioneered a variety of 3D television
3D television
systems using electromechanical and cathode-ray tube techniques. The first 3D TV was produced in 1935. The advent of digital television in the 2000s greatly improved 3D TVs. Although 3D TV sets are quite popular for watching 3D home media such as on Blu-ray discs, 3D programming has largely failed to make inroads with the public. Many 3D television channels which started in the early 2010s were shut down by the mid-2010s.According to DisplaySearch 3D televisions shipments totaled 41.45 million units in 2012, compared with 24.14 in 2011 and 2.26 in 2010. As of late 2013, the number of 3D TV viewers started to decline.

BROADCAST SYSTEMS

TERRESTRIAL TELEVISION

Main article: Terrestrial television See also: Timeline of the introduction of television in countries A modern high gain UHF Yagi television antenna . It has 17 directors, and 4 reflectors shaped as a corner reflector .

Programming is broadcast by television stations, sometimes called "channels", as stations are licensed by their governments to broadcast only over assigned channels in the television band . At first, terrestrial broadcasting was the only way television could be widely distributed, and because bandwidth was limited, i.e., there were only a small number of channels available, government regulation was the norm. In the U.S., the Federal Communications Commission (FCC) allowed stations to broadcast advertisements beginning in July 1941, but required public service programming commitments as a requirement for a license. By contrast, the United Kingdom chose a different route, imposing a television license fee on owners of television reception equipment to fund the British Broadcasting Corporation (BBC), which had public service as part of its Royal Charter .

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
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 W NBC
NBC
. 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. On 2 November 1936, the BBC
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 TV broadcasting as we know it today.

With the widespread adoption of cable across the United States in the 1970s and 80s, terrestrial television broadcasts have been in decline; in 2013 it was estimated that about 7% of US households used an antenna. A slight increase in use began around 2010 due to switchover to digital terrestrial television broadcasts, which offered pristine image quality over very large areas, and offered an alternate to cable television (CATV) for cord cutters . All other countries around the world are also in the process of either shutting down analog terrestrial television or switching over to digital terrestrial television.

CABLE TELEVISION

Main article: Cable television See also: Cable television by region

THIS SECTION NEEDS EXPANSION. You can help by adding to it . (December 2014)

Coaxial cable is used to carry cable television signals into cathode ray tube and flat panel television sets.

Cable television is a system of broadcasting television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables or light pulses through fiber-optic cables. This contrasts with traditional terrestrial television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. In the 2000s, FM radio programming, high-speed Internet, telephone service, and similar non-television services may also be provided through these cables. The abbreviation CATV is often used for cable television. It originally stood for Community Access Television
Television
or Community Antenna Television, from cable television's origins in 1948: in areas where over-the-air reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, and cable was run from them to individual homes. The origins of cable broadcasting are even older as radio programming was distributed by cable in some European cities as far back as 1924. Earlier cable television was analog, but since the 2000s, all cable operators have switched to, or are in the process of switching to, digital cable television.

SATELLITE TELEVISION

Main article: Satellite television DBS satellite dishes installed on an apartment complex.

Satellite television is a system of supplying television programming using broadcast signals relayed from communication satellites . The signals are received via an outdoor parabolic reflector antenna usually referred to as a satellite dish and a low-noise block downconverter (LNB). A satellite receiver then decodes the desired television program for viewing on a television set . Receivers can be external set-top boxes , or a built-in television tuner . Satellite television provides a wide range of channels and services, especially to geographic areas without terrestrial television or cable television.

The most common method of reception is direct-broadcast satellite television (DBSTV), also known as "direct to home" (DTH). In DBSTV systems, signals are relayed from a direct broadcast satellite on the Ku wavelength and are completely digital. Satellite TV systems formerly used systems known as television receive-only . These systems received analog signals transmitted in the C-band spectrum from FSS type satellites, and required the use of large dishes. Consequently, these systems were nicknamed "big dish" systems, and were more expensive and less popular.

The direct-broadcast satellite television signals were earlier analog signals and later digital signals, both of which require a compatible receiver. Digital signals may include high-definition television (HDTV). Some transmissions and channels are free-to-air or free-to-view , while many other channels are pay television requiring a subscription. In 1945, British science fiction writer Arthur C. Clarke proposed a worldwide communications system which would function by means of three satellites equally spaced apart in earth orbit. This was published in the October 1945 issue of the Wireless World magazine and won him the Franklin Institute
Franklin Institute
's Stuart Ballantine Medal in 1963.

The first satellite television signals from Europe to North America were relayed via the Telstar
Telstar
satellite over the Atlantic
Atlantic
ocean on 23 July 1962. The signals were received and broadcast in North American and European countries and watched by over 100 million. Launched in 1962, the Relay 1 satellite was the first satellite to transmit television signals from the US to Japan. The first geosynchronous communication satellite , Syncom 2 , was launched on 26 July 1963.

The world's first commercial communications satellite, called Intelsat I and nicknamed "Early Bird", was launched into geosynchronous orbit on 6 April 1965. The first national network of television satellites, called Orbita , was created by the Soviet Union in October 1967, and was based on the principle of using the highly elliptical Molniya satellite for rebroadcasting and delivering of television signals to ground downlink stations. The first commercial North American satellite to carry television transmissions was Canada's geostationary Anik 1
Anik 1
, which was launched on 9 November 1972. ATS-6 , the world's first experimental educational and Direct Broadcast Satellite (DBS), was launched on 30 May 1974. It transmitted at 860 MHz using wideband FM modulation and had two sound channels. The transmissions were focused on the Indian subcontinent but experimenters were able to receive the signal in Western Europe using home constructed equipment that drew on UHF television design techniques already in use.

The first in a series of Soviet geostationary satellites to carry Direct-To-Home television, Ekran 1, was launched on 26 October 1976. It used a 714 MHz UHF downlink frequency so that the transmissions could be received with existing UHF television technology rather than microwave technology.

INTERNET TELEVISION

Main article: Internet television Not to be confused with Smart television , Internet Protocol television
Internet Protocol television
, or Web television .

Internet television ( Internet
Internet
TV) (or online television) is the digital distribution of television content via the Internet
Internet
as opposed to traditional systems like terrestrial, cable, and satellite, although the Internet
Internet
itself is received by terrestrial, cable, or satellite methods. Internet television is a general term that covers the delivery of television shows, and other video content, over the Internet
Internet
by video streaming technology, typically by major traditional television broadcasters. Internet television should not to be confused with Smart TV , IPTV
IPTV
or with Web TV . Smart television refers to the TV set which has a built-in operating system. Internet
Internet
Protocol television (IPTV) is one of the emerging Internet
Internet
television technology standards for use by television broadcasters. Web television is a term used for programs created by a wide variety of companies and individuals for broadcast on Internet
Internet
TV.

SETS

Main article: Television set RCA
RCA
630-TS, the first mass-produced television set, which sold in 1946–1947

A television set, also called a television receiver, television, TV set, TV, or "telly", is a device that combines a tuner, display, an amplifier, and speakers for the purpose of viewing television and hearing its audio components. Introduced in late 1920's in mechanical form, television sets became a popular consumer product after World War II in electronic form, using cathode ray tubes . The addition of color to broadcast television after 1953 further increased the popularity of television sets and an outdoor antenna became a common feature of suburban homes. The ubiquitous television set became the display device for recorded media in the 1970s, such as Betamax and VHS
VHS
, which enabled viewers to record TV shows and watch prerecorded movies. In the subsequent decades, TVs were used to watch DVDs and Blu-ray Discs of movies and other content. Major TV manufacturers announced the discontinuation of CRT, DLP, plasma and fluorescent-backlit LCDs by the mid-2010s. Televisions since 2010s mostly use LEDs . LEDs are expected to be gradually replaced by OLEDs in near future.

DISPLAY TECHNOLOGIES

Main article: Display device

Disk

Main article: Nipkow disk
Nipkow disk

The earliest systems employed a spinning disk to create and reproduce images. These usually had a low resolution and screen size and never became popular with the public.

CRT

Main article: Cathode ray tube A 14-inch cathode ray tube showing its deflection coils and electron guns

The cathode ray tube (CRT) is a vacuum tube containing one or more electron guns (a source of electrons or electron emitter) and a fluorescent screen used to view images. It has a means to accelerate and deflect the electron beam(s) onto the screen to create the images. The images may represent electrical waveforms (oscilloscope ), pictures (television, computer monitor ), radar targets or others. The CRT uses an evacuated glass envelope which is large, deep (i.e. long from front screen face to rear end), fairly heavy, and relatively fragile. As a matter of safety, the face is typically made of thick lead glass so as to be highly shatter-resistant and to block most X-ray emissions, particularly if the CRT is used in a consumer product.

In television sets and computer monitors , the entire front area of the tube is scanned repetitively and systematically in a fixed pattern called a raster . An image is produced by controlling the intensity of each of the three electron beams , one for each additive primary color (red, green, and blue) with a video signal as a reference. In all modern CRT monitors and televisions, the beams are bent by magnetic deflection, a varying magnetic field generated by coils and driven by electronic circuits around the neck of the tube, although electrostatic deflection is commonly used in oscilloscopes , a type of diagnostic instrument.

DLP

Main article: Digital Light Processing
Digital Light Processing
The Christie Mirage 5000, a 2001 DLP projector.

Digital Light Processing
Digital Light Processing
(DLP) is a type of video projector technology that uses a digital micromirror device . Some DLPs have a TV tuner, which makes them a type of TV display. It was originally developed in 1987 by Dr. Larry Hornbeck of Texas Instruments . While the DLP imaging device was invented by Texas Instruments, the first DLP based projector was introduced by Digital Projection Ltd in 1997. Digital Projection and Texas Instruments were both awarded Emmy Awards in 1998 for invention of the DLP projector technology. DLP is used in a variety of display applications from traditional static displays to interactive displays and also non-traditional embedded applications including medical, security, and industrial uses. DLP technology is used in DLP front projectors (standalone projection units for classrooms and business primarily), but also in private homes; in these cases, the image is projected onto a projection screen. DLP is also used in DLP rear projection television sets and digital signs. It is also used in about 85% of digital cinema projection.

Plasma

Main article: Plasma display
Plasma display

A plasma display panel (PDP) is a type of flat panel display common to large TV displays 30 inches (76 cm) or larger. They are called "plasma " displays because the technology utilizes small cells containing electrically charged ionized gases , or what are in essence chambers more commonly known as fluorescent lamps .

LCD

Main article: Liquid crystal display A generic LCD
LCD
TV, with speakers on either side of the screen.

Liquid-crystal-display televisions ( LCD
LCD
TV) are television sets that use LCD
LCD
display technology to produce images. LCD
LCD
televisions are much thinner and lighter than cathode ray tube (CRTs) of similar display size, and are available in much larger sizes (e.g., 90-inch diagonal). When manufacturing costs fell, this combination of features made LCDs practical for television receivers. LCD's come in two types: those using cold cathode fluorescent lamps , simply called LCDs and those using LED
LED
as backlight called as LEDs .

In 2007, LCD
LCD
televisions surpassed sales of CRT-based televisions worldwide for the first time, and their sales figures relative to other technologies accelerated. LCD
LCD
TVs have quickly displaced the only major competitors in the large-screen market, the plasma display panel and rear-projection television . In mid 2010s LCDs especially LEDs became, by far, the most widely produced and sold television display type. LCDs also have disadvantages. Other technologies address these weaknesses, including OLEDs , FED and SED , but as of 2014 none of these have entered widespread production.

OLED

Main article: Organic light-emitting diode OLED
OLED
TV

An OLED
OLED
(organic light-emitting diode) is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compound which emits light in response to an electric current. This layer of organic semiconductor is situated between two electrodes. Generally, at least one of these electrodes is transparent. OLEDs are used to create digital displays in devices such as television screens. It is also used for computer monitors, portable systems such as mobile phones , handheld games consoles and PDAs .

There are two main families of OLED: those based on small molecules and those employing polymers . Adding mobile ions to an OLED
OLED
creates a light-emitting electrochemical cell or LEC, which has a slightly different mode of operation. OLED
OLED
displays can use either passive-matrix (PMOLED) or active-matrix (AMOLED) addressing schemes. Active-matrix OLEDs require a thin-film transistor backplane to switch each individual pixel on or off, but allow for higher resolution and larger display sizes.

An OLED
OLED
display works without a backlight . Thus, it can display deep black levels and can be thinner and lighter than a liquid crystal display (LCD). In low ambient light conditions such as a dark room an OLED
OLED
screen can achieve a higher contrast ratio than an LCD, whether the LCD
LCD
uses cold cathode fluorescent lamps or LED
LED
backlight . OLEDs are expected to replace other forms of display in near future.

DISPLAY RESOLUTION

Comparison of 8K UHDTV, 4K UHDTV, HDTV and SDTV resolution

LD

Main article: Low-definition television

Low-definition television or LDTV refers to television systems that have a lower screen resolution than standard-definition television systems such 240p (320*240). It is used in handheld television . The most common source of LDTV programming is the Internet, where mass distribution of higher-resolution video files could overwhelm computer servers and take too long to download. Many mobile phones and portable devices such as Apple 's iPod Nano , or Sony's PlayStation Portable use LDTV video, as higher-resolution files would be excessive to the needs of their small screens (320×240 and 480×272 pixels respectively). The current generation of iPod Nanos have LDTV screens, as do the first three generations of iPod Touch and iPhone (480×320). For the first years of its existence, YouTube offered only one, low-definition resolution of 320x 240p at 30fps or less. A standard, consumer grade VHS
VHS
videotape can be considered SDTV due to its resolution (approximately 360 × 480i/576i).

SD

Main article: Standard-definition television
Standard-definition television

Standard-definition television
Standard-definition television
or SDTV refers to two different resolutions: 576i
576i
, with 576 interlaced lines of resolution, derived from the European-developed PAL
PAL
and SECAM
SECAM
systems; and 480i based on the American National Television
Television
System Committee NTSC system. SDTV is a television system that uses a resolution that is not considered to be either high-definition television ( 720p , 1080i
1080i
, 1080p
1080p
, 1440p
1440p
, 4K UHDTV
4K UHDTV
, and 8K UHD
8K UHD
) or enhanced-definition television (EDTV 480p ). In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals with widescreen content being center cut . However, in other parts of the world that used the PAL
PAL
or SECAM
SECAM
color systems, standard-definition television is now usually shown with a 16:9 aspect ratio , with the transition occurring between the mid-1990s and mid-2000s. Older programs with a 4:3 aspect ratio are shown in the US as 4:3 with non-ATSC countries preferring to reduce the horizontal resolution by anamorphically scaling a pillarboxed image.

HD

Main article: High-definition television

High-definition television (HDTV) provides a resolution that is substantially higher than that of standard-definition television .

HDTV may be transmitted in various formats:

* 1080p
1080p
: 1920×1080p: 2,073,600 pixels (~2.07 megapixels ) per frame

* 1080i
1080i
: 1920×1080i: 1,036,800 pixels (~1.04 MP) per field or 2,073,600 pixels (~2.07 MP) per frame

* A non-standard CEA resolution exists in some countries such as 1440×1080i: 777,600 pixels (~0.78 MP) per field or 1,555,200 pixels (~1.56 MP) per frame

* 720p : 1280×720p: 921,600 pixels (~0.92 MP) per frame

UHD

Main article: Ultra-high-definition television
Ultra-high-definition television

Ultra-high-definition television
Ultra-high-definition television
(also known as Super Hi-Vision, Ultra HD television, UltraHD, UHDTV, or UHD ) includes 4K UHD (2160p) and 8K UHD
8K UHD
(4320p), which are two digital video formats proposed by NHK
NHK
Science "> , 48 million are sold each year at an average price of $460 and size of 38 in (97 cm).

WORLDWIDE LARGE-SCREEN TELEVISION TECHNOLOGY BRAND REVENUE SHARE IN Q2 2013

MANUFACTURER DISPLAYSEARCH

Samsung Electronics 26.5%

LG Electronics
LG Electronics
16.3%

Sony
Sony
8%

Panasonic
Panasonic
5.3%

TCL 5.1%

Others 38.8%

* Note: Vendor shipments are branded shipments and exclude OEM sales for all vendors

WORLDWIDE LCD
LCD
TV MANUFACTURERS MARKET SHARE IN 2015

MANUFACTURER STATISTA

Samsung Electronics 20.98%

LG Electronics
LG Electronics
12.4%

Hisense
Hisense
5.56%

TCL 5.56%

Sony
Sony
5.54%

Others 32.3%

CONTENT

PROGRAMMING

See also: Television program

Getting TV programming shown to the public can happen in many different ways. After production, the next step is to market and deliver the product to whichever markets are open to using it. This typically happens on two levels:

* Original run or First run: a producer creates a program of one or multiple episodes and shows it on a station or network which has either paid for the production itself or to which a license has been granted by the television producers to do the same. * Broadcast syndication : this is the terminology rather broadly used to describe secondary programming usages (beyond original run). It includes secondary runs in the country of first issue, but also international usage which may not be managed by the originating producer. In many cases, other companies, TV stations, or individuals are engaged to do the syndication work, in other words, to sell the product into the markets they are allowed to sell into by contract from the copyright holders, in most cases the producers.

First-run programming is increasing on subscription services outside the US, but few domestically produced programs are syndicated on domestic free-to-air (FTA) elsewhere. This practice is increasing, however, generally on digital-only FTA channels or with subscriber-only, first-run material appearing on FTA. Unlike the US, repeat FTA screenings of an FTA network program usually only occur on that network. Also, affiliates rarely buy or produce non-network programming that is not centered on local programming .

GENRES

The examples and perspective in this section DEAL PRIMARILY WITH THE UNITED STATES AND DO NOT REPRESENT A WORLDWIDE VIEW OF THE SUBJECT. You may improve this article , discuss the issue on the talk page , or create a new article , as appropriate. (December 2014) (Learn how and when to remove this template message )

Television
Television
genres include a broad range of programming types that entertain, inform, and educate viewers. The most expensive entertainment genres to produce are usually dramas and dramatic miniseries . However, other genres, such as historical Western genres, may also have high production costs.

Popular culture entertainment genres include action-oriented shows such as police, crime, detective dramas, horror, or thriller shows. As well, there are also other variants of the drama genre, such as medical dramas and daytime soap operas. Science fiction shows can fall into either the drama or action category, depending on whether they emphasize philosophical questions or high adventure. Comedy is a popular genre which includes situation comedy (sitcom) and animated shows for the adult demographic such as South Park
South Park
.

The least expensive forms of entertainment programming genres are game shows, talk shows, variety shows, and reality television. Game shows feature contestants answering questions and solving puzzles to win prizes. Talk
Talk
shows contain interviews with film, television, music and sports celebrities and public figures. Variety shows feature a range of musical performers and other entertainers, such as comedians and magicians, introduced by a host or Master of Ceremonies . There is some crossover between some talk shows and variety shows because leading talk shows often feature performances by bands, singers, comedians, and other performers in between the interview segments. Reality TV shows "regular" people (i.e., not actors) facing unusual challenges or experiences ranging from arrest by police officers (COPS ) to significant weight loss ( The Biggest Loser ). A variant version of reality shows depicts celebrities doing mundane activities such as going about their everyday life ( The Osbournes , Snoop Dogg\'s Father Hood ) or doing regular jobs ( The Simple Life
The Simple Life
).

Fictional television programs that some television scholars and broadcasting advocacy groups argue are "quality television ", include series such as Twin Peaks
Twin Peaks
and The Sopranos . Kristin Thompson argues that some of these television series exhibit traits also found in art films , such as psychological realism, narrative complexity, and ambiguous plotlines. Nonfiction television programs that some television scholars and broadcasting advocacy groups argue are "quality television", include a range of serious, noncommercial, programming aimed at a niche audience, such as documentaries and public affairs shows.

FUNDING

Television
Television
sets per 1000 people of the world

1000+ 100–200

500–1000 50–100

300–500 0–50

200–300 No data

Around the globe, broadcast TV is financed by government, advertising, licensing (a form of tax), subscription, or any combination of these. To protect revenues, subscription TV channels are usually encrypted to ensure that only subscribers receive the decryption codes to see the signal. Unencrypted channels are known as free to air or FTA. In 2009, the global TV market represented 1,217.2 million TV households with at least one TV and total revenues of 268.9 billion EUR (declining 1.2% compared to 2008). North America had the biggest TV revenue market share with 39% followed by Europe (31%), Asia-Pacific (21%), Latin America (8%), and Africa and the Middle East (2%). Globally, the different TV revenue sources divide into 45%–50% TV advertising revenues, 40%–45% subscription fees and 10% public funding.

Advertising

Main article: Television advertisement

TV's broad reach makes it a powerful and attractive medium for advertisers. Many TV networks and stations sell blocks of broadcast time to advertisers ("sponsors") to fund their programming. Television
Television
advertisements (variously called a television commercial, commercial or ad in American English , and known in British English as an advert) is a span of television programming produced and paid for by an organization, which conveys a message, typically to market a product or service. Advertising revenue provides a significant portion of the funding for most privately owned television networks. The vast majority of television advertisements today consist of brief advertising spots, ranging in length from a few seconds to several minutes (as well as program-length infomercials ). Advertisements of this sort have been used to promote a wide variety of goods, services and ideas since the beginning of television. Television
Television
was still in its experimental phase in 1928, but the medium's potential to sell goods was already predicted.

The effects of television advertising upon the viewing public (and the effects of mass media in general) have been the subject of philosophical discourse by such luminaries as Marshall McLuhan
Marshall McLuhan
. The viewership of television programming, as measured by companies such as Nielsen Media Research , is often used as a metric for television advertisement placement, and consequently, for the rates charged to advertisers to air within a given network, television program, or time of day (called a "daypart"). In many countries, including the United States, television campaign advertisements are considered indispensable for a political campaign . In other countries, such as France, political advertising on television is heavily restricted, while some countries, such as Norway
Norway
, completely ban political advertisements.

The first official, paid television advertisement was broadcast in the United States on 1 July 1941 over New York station WNBT (now WNBC ) before a baseball game between the Brooklyn Dodgers and Philadelphia Phillies . The announcement for Bulova
Bulova
watches, for which the company paid anywhere from $4.00 to $9.00 (reports vary), displayed a WNBT test pattern modified to look like a clock with the hands showing the time. The Bulova
Bulova
logo, with the phrase " Bulova
Bulova
Watch Time", was shown in the lower right-hand quadrant of the test pattern while the second hand swept around the dial for one minute. The first TV ad broadcast in the UK was on ITV on 22 September 1955, advertising Gibbs SR toothpaste. The first TV ad broadcast in Asia was on Nippon Television in Tokyo on 28 August 1953, advertising Seikosha
Seikosha
(now Seiko ), which also displayed a clock with the current time.

United States

Since inception in the US in 1941, television commercials have become one of the most effective, persuasive, and popular methods of selling products of many sorts, especially consumer goods. During the 1940s and into the 1950s, programs were hosted by single advertisers. This, in turn, gave great creative license to the advertisers over the content of the show. Perhaps due to the quiz show scandals in the 1950s, networks shifted to the magazine concept, introducing advertising breaks with multiple advertisers.

US advertising rates are determined primarily by Nielsen ratings . The time of the day and popularity of the channel determine how much a TV commercial can cost. For example, it can cost approximately $750,000 for a 30-second block of commercial time during the highly popular American Idol , while the same amount of time for the Super Bowl can cost several million dollars. Conversely, lesser-viewed time slots , such as early mornings and weekday afternoons, are often sold in bulk to producers of infomercials at far lower rates. In recent years, the paid program or infomercial has become common, usually in lengths of 30 minutes or one hour. Some drug companies and other businesses have even created "news" items for broadcast, known in the industry as video news releases , paying program directors to use them.

Some TV programs also deliberately place products into their shows as advertisements, a practice started in feature films and known as product placement . For example, a character could be drinking a certain kind of soda, going to a particular chain restaurant , or driving a certain make of car. (This is sometimes very subtle, with shows having vehicles provided by manufacturers for low cost in exchange as a product placement ). Sometimes, a specific brand or trade mark , or music from a certain artist or group, is used. (This excludes guest appearances by artists who perform on the show.)

United Kingdom

The TV regulator oversees TV advertising in the United Kingdom. Its restrictions have applied since the early days of commercially funded TV. Despite this, an early TV mogul, Roy Thomson , likened the broadcasting licence as being a "licence to print money". Restrictions mean that the big three national commercial TV channels: ITV , Channel 4
Channel 4
, and Channel 5 can show an average of only seven minutes of advertising per hour (eight minutes in the peak period). Other broadcasters must average no more than nine minutes (twelve in the peak). This means that many imported TV shows from the US have unnatural pauses where the UK company does not utilize the narrative breaks intended for more frequent US advertising. Advertisements must not be inserted in the course of certain specific proscribed types of programs which last less than half an hour in scheduled duration; this list includes any news or current affairs programs, documentaries, and programs for children; additionally, advertisements may not be carried in a program designed and broadcast for reception in schools or in any religious broadcasting service or other devotional program or during a formal Royal ceremony or occasion. There also must be clear demarcations in time between the programs and the advertisements. The BBC
BBC
, being strictly non-commercial , is not allowed to show advertisements on television in the UK, although it has many advertising-funded channels abroad. The majority of its budget comes from television license fees (see below) and broadcast syndication , the sale of content to other broadcasters.

Ireland

The Broadcasting Commission of Ireland (BCI) (Irish : Coimisiún Craolacháin na hÉireann) oversees advertising on television and radio within Ireland for both private and state-owned broadcasters. There are some restrictions based on advertising, especially in relation to the advertising of alcohol. Such advertisements are prohibited until after 7 pm. Broadcasters in Ireland adhere to broadcasting legislation implemented by the Broadcasting Commission of Ireland and the European Union
European Union
. Sponsorship of current affairs programming is prohibited at all times. As of 1 October 2009, the responsibilities held by the BCI are gradually being transferred to the Broadcasting Authority of Ireland .

Subscription

Some TV channels are partly funded from subscriptions ; therefore, the signals are encrypted during broadcast to ensure that only the paying subscribers have access to the decryption codes to watch pay television or specialty channels . Most subscription services are also funded by advertising.

Taxation Or License

Television
Television
services in some countries may be funded by a television licence or a form of taxation, which means that advertising plays a lesser role or no role at all. For example, some channels may carry no advertising at all and some very little, including:

* Australia (ABC ) * Belgium
Belgium
( RTBF ) * Denmark
Denmark
(DR ) * Ireland (RTÉ ) * Japan ( NHK
NHK
) * Norway
Norway
( NRK
NRK
) * Sweden
Sweden
(SVT ) * United Kingdom ( BBC
BBC
) * United States ( PBS )

The BBC
BBC
carries no television advertising on its UK channels and is funded by an annual television licence paid by premises receiving live TV broadcasts. Currently, it is estimated that approximately 26.8 million UK private domestic households own televisions, with approximately 25 million TV licences in all premises in force as of 2010. This television license fee is set by the government, but the BBC
BBC
is not answerable to or controlled by the government.

The two main BBC
BBC
TV channels are watched by almost 90% of the population each week and overall have 27% share of total viewing, despite the fact that 85% of homes are multichannel, with 42% of these having access to 200 free to air channels via satellite and another 43% having access to 30 or more channels via Freeview . The licence that funds the seven advertising-free BBC
BBC
TV channels currently costs £139.50 a year (about US$215) regardless of the number of TV sets owned. When the same sporting event has been presented on both BBC
BBC
and commercial channels, the BBC
BBC
always attracts the lion's share of the audience , indicating that viewers prefer to watch TV uninterrupted by advertising.

Other than internal promotional material, the Australian Broadcasting Corporation (ABC) carries no advertising; it is banned under the ABC Act 1983. The ABC receives its funding from the Australian government every three years. In the 2014/15 federal budget, the ABC received A$1.11 billion. The funds provide for the ABC's television, radio, online, and international outputs. The ABC also receives funds from its many ABC shops across Australia. Although funded by the Australian government, the editorial independence of the ABC is ensured through law.

In France, government-funded channels carry advertisements, yet those who own television sets have to pay an annual tax ("la redevance audiovisuelle").

In Japan, NHK
NHK
is paid for by license fees (known in Japanese as reception fee (受信料, Jushinryō)). The broadcast law that governs NHK's funding stipulates that any television equipped to receive NHK is required to pay. The fee is standardized, with discounts for office workers and students who commute, as well a general discount for residents of Okinawa prefecture.

BROADCAST PROGRAMMING

Main article: Broadcast programming See also: TV listings (UK)

Broadcast programming, or TV listings in the United Kingdom, is the practice of organizing and or ordering of television programs in a daily, weekly, monthly, quarterly or season-long schedule, with broadcast automation used to regularly change the scheduling of TV programs to build an audience for a new show, retain that audience, or compete with other broadcasters' programs.

SOCIAL ASPECTS

Main article: Social aspects of television American family watching TV, circa 1958

Television
Television
has played a pivotal role in the socialization of the 20th and 21st centuries. There are many aspects of television that can be addressed, including negative issues such as media violence . Current research is discovering that individuals suffering from social isolation can employ television to create what is termed a parasocial or faux relationship with characters from their favorite television shows and movies as a way of deflecting feelings of loneliness and social deprivation. Several studies have found that educational television has many advantages. The article "The Good Things about Television" argues that television can be a very powerful and effective learning tool for children if used wisely.

CONSUMPTION

Main article: Television consumption

ENVIRONMENTAL ASPECTS

With high lead content in CRTs and the rapid diffusion of new flat-panel display technologies, some of which (LCDs ) use lamps which contain mercury , there is growing concern about electronic waste from discarded televisions. Related occupational health concerns exist, as well, for disassemblers removing copper wiring and other materials from CRTs. Further environmental concerns related to television design and use relate to the devices' increasing electrical energy requirements.

SEE ALSO

* Television
Television
portal

* Broadcast-safe * Content Discovery Platform * Information-action ratio * List of countries by number of television broadcast stations * List of television manufacturers * List of years in television * Media psychology * Sign language on television * Television studies * Murder by Television , a murder mystery from 1935

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FURTHER READING

* Abramson, Albert (2003). The History of Television, 1942 to 2000. Jefferson, NC, and London: McFarland. ISBN 0-7864-1220-8 . * Pierre Bourdieu , On Television, The New Press, 2001. * Tim Brooks and Earle March, The Complete Guide to Prime Time Network and Cable TV Shows, 8th ed., Ballantine, 2002. * Jacques Derrida and Bernard Stiegler , Echographies of Television, Polity Press, 2002. * David E. Fisher and Marshall J. Fisher, Tube: the Invention of Television, Counterpoint, Washington, DC, 1996, ISBN 1-887178-17-1 . * Steven Johnson , Everything Bad is Good for You: How Today\'s Popular Culture Is Actually Making Us Smarter , New York, Riverhead (Penguin), 2005, 2006, ISBN 1-59448-194-6 . * Leggett, Julian (April 1941). " Television
Television
in Color". Popular Mechanics . Chicago. Retrieved 2014-12-07. * Jerry Mander , Four Arguments for the Elimination of Television, Perennial, 1978. * Jerry Mander, In the Absence of the Sacred, Sierra Club Books, 1992, ISBN 0-87156-509-9 . * Neil Postman , Amusing Ourselves to Death : Public Discourse in the Age of Show Business, New York, Penguin US, 1985, ISBN 0-670-80454-1 . * Evan I. Schwartz, The Last Lone Inventor: A Tale of Genius, Deceit, and the Birth of Television, New York, Harper Paperbacks, 2003, ISBN 0-06-093559-6 . * Beretta E. Smith-Shomade, Shaded Lives: African-American Women and Television, Rutgers University Press, 2002. * Alan Taylor, We, the Media: Pedagogic Intrusions into US Mainstream Film
Film
and Television
Television
News
News
Broadcasting Rhetoric, Peter Lang, 2005, ISBN 3-631-51852-8 . * Amanda D. Lotz , The Television
Television
Will Be Revolutionized, New York University Press, ISBN 978-0814752203

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