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 24 August 1900.
Another development was the move from standard-definition television (SDTV) (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, 1080i and 720p.
A visual display device which lacks a tuner is correctly called a video monitor rather than a television.
Alternatively television signals are distributed by coaxial cable or optical fiber, satellite systems and, since the 2000s via the 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.
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.
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