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Family watching TV, 1958. The concept of television is the work of many individuals in the late 19th and early 20th centuries. The first practical transmissions of moving images over a radio system used mechanical rotating perforated disks to scan a scene into a time-varying signal that could be reconstructed at a receiver back into an approximation of the original image.
This list should not be interpreted to mean the whole of a country had television service by the specified date. For example, the United States, Great Britain, Germany, and the former Soviet Union all had operational television stations and a limited number of viewers by 1939. Very few cities in each country had television service.
The word television comes from Ancient Greek τῆλε (tele) 'far' and Latin visio '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 first International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris.
The early days of television introduced hour-long anthology drama series, many of which received critical acclaim. [6] [7] Examples include Kraft Television Theatre (debuted May 7, 1947), The Chevrolet Tele-Theatre (debuted September 27, 1948), Television Playhouse (debuted December 4, 1947), The Philco Television Playhouse (debuted October 3, 1948), Westinghouse Studio One (debuted November 7 ...
In 1925, he demonstrated a CRT television with thermal electron emission. [29] In 1926, he demonstrated a CRT television with 40-line resolution, [30] the first working example of a fully electronic television receiver. [29] In 1927, he increased the television resolution to 100 lines, which was unrivaled until 1931. [31]
Introduction of color television in countries by decade. This is a list of when the first color television broadcasts were transmitted to the general public. Non-public field tests, closed-circuit demonstrations and broadcasts available from other countries are not included, while including dates when the last black-and-white stations in the country switched to color or shutdown all black-and ...
1940: The American Federal Communications Commission, (), holds public hearings about television; 1941: First television advertisements aired. The first official, paid television advertisement was broadcast in the United States on July 1, 1941, over New York station WNBT (now WNBC) before a baseball game between the Brooklyn Dodgers and the Philadelphia Phillies.
The elements of a simple broadcast television system are: . An image source. This is the electrical signal that represents a visual image, and may be derived from a professional video camera in the case of live television, a video tape recorder for playback of recorded images, or telecine with a flying spot scanner for the transfer of motion pictures to video).