The first television broadcast in history took place on January 26, 1926, when the Scottish engineer and physicist John Logie Baird (1888-1946), managed, from a laboratory in London, England, to broadcast the first images out of an television device, showing the recording of a friend from his office (other sources claim that it was a doll's head with a definition of 28 lines and a frame rate of 14 frames per second in the attic of his house). He did it in front of members of the Royal Institution, and a journalist of the British newspaper The Times. This was the first demonstration of a television system that transmitted live moving images, measuring 8.9 by 5 centimeters and with tone graduations.
Baird made the transmission through a system consisting of two discs, one in the transmitter and one in the receiver, attached to the same axis so that its rotation was fully synchronized and with a separation of 2 meters; the rotation of the two discs allowed stream a live image on a screen.
Previously, on March 25, 1925, Baird had already disclosed a televised projection in London warehouses called Selfridges, but then, since it was not a dynamic image, but a static one, it was not considered a televised retransmission. However, the idea of broadcasting moving images in real time had begun long ago, when in 1884, the German student Paul Nipkow designed and patented a system he called a Nipkow disc, which were the first electromechanical television system, a television project that could not be developed back then. Baird resumed those previous advances to achieve the first real television experience.
In 1927, a year after that first image, Baird managed to transmit a signal from London to Glasgow, via a telephone cable, and, in 1928, his company, Baird Television Development Company, got the first transoceanic television signal between London and New York. In 1929, its 240-line mechanical scanning system, with which the image became much sharper, was experimentally adopted by the British Broadcasting Corporation (BBC), which was responsible for the first broadcasts open to the public on August 26 of 1935 (and subsequently, from November 2, 1936, the BBC began the first regular public broadcast in the world).
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| John Logie Baird (1888-1946) |
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