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This was first embodied in the device which came to be known as the video telephone, or videophone, and it evolved from intensive research and experimentation in several telecommunication fields, notably electrical telegraphy, telephony, radio, and television.

Simple analog videophone communication could be established as early as the invention of the television.

Videotelephony developed in parallel with conventional voice telephone systems from the mid-to-late 20th century.

Very expensive videoconferencing systems rapidly evolved throughout the 1980s and 1990s from proprietary equipment, software and network requirements to standards-based technologies that were available for anyone to purchase at a reasonable cost.

In 1984, Concept Communication in the United States replaced the then-100 pound, US0,000 computers necessary for teleconferencing, with a ,000 circuit board that doubled the video frame rate from 15 up to 30 frames per second, and which reduced the equipment to the size of a circuit board fitting into standard personal computers.

Videoconferencing systems throughout the 1990s rapidly evolved from very expensive proprietary equipment, software and network requirements to a standards-based technology readily available to the general public at a reasonable cost.

Finally, in the 1990s, Internet Protocol-based videoconferencing became possible, and more efficient video compression technologies were developed, permitting desktop, or personal computer (PC)-based videoconferencing.

In 1992 CU-See Me was developed at Cornell by Tim Dorcey et al.

One of the first commercial videoconferencing systems sold to companies came from Picture Tel Corp., which had an Initial Public Offering in November, 1984.Such an antecedent usually consisted of two closed-circuit television systems connected via coax cable or radio.An example of that was the German Reich Postzentralamt (post office) video telephone network serving Berlin and several German cities via coaxial cables between 19.During this time, there was also research into other forms of digital video and audio communication.Many of these technologies, such as the Media space, are not as widely used today as videoconferencing but were still an important area of research.

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