Video conferencia

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Universidade Presbiteriana Mackenzie











VIDEOCONFERENCE







































































































"Trabalho exigido pela disciplina Ingles tecnico Im orientado pela Profª Ms. Monica de Alice para a obtenção daMedia Final""












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Abstract



In this research we will present the videoconference system, explaining how it works, what it is necessary to use and how it can help and make life easier both in thebusiness area as in people's lives.













































Introduction

Videoconferencing is the conduct of a videoconference (also known as a video conference or video teleconference) by a set of telecommunication technologies which allow two or more locations to communicate by simultaneous two-way video and audio transmissions. Ithas also been called 'visual collaboration' and is a type of groupware.

Videoconferencing differs from videophone calls in that it's designed to serve a conference or multiple locations rather than individuals. It is an intermediate form of videotelephony, first deployed commercially in the United States by AT&T Corporation during the early 1970s as part of their development of Picture phonetechnology.

With the introduction of relatively low cost, high capacity broadband telecommunication services in the late 1990s, coupled with powerful computing processors and video compression techniques, videoconferencing usage has made significant inroads in business, education, medicine and media. Like all long distance communications technologies (such as phone and Internet), by reducing theneed to travel to bring people together the technology also contributes to reductions in carbon emissions, thereby helping to reduce global warming.









History

Videoconferencing uses audio and video telecommunications to bring people at different sites together. This can be as simple as a conversation between people in private offices (point-to-point) or involve several(multipoint) sites in large rooms at multiple locations. Besides the audio and visual transmission of meeting activities, allied videoconferencing technologies can be used to share documents and display information on whiteboards.



the first systems developed by AT&T Corporation, first researched in the 1950s, failed mostly due to the poor picture quality and the lack of efficient video compressiontechniques. The greater 1 MHz bandwidth and 6 Mbit/s bit rate of the Picture phone in the 1970s also did not achieve commercial success, mostly due to its high cost, but also due to a lack of network effect —with only a few hundred Picture phones in the world, users had extremely few contacts they could actually call to, and interoperability with other videophone systems did not exist.Videoconferencing uses audio and video telecommunications to bring people at different sites together. This can be as simple as a conversation between people in private offices (point-to-point) or involve several (multipoint) sites in large rooms at multiple locations. Besides the audio and visual transmission of meeting activities, allied videoconferencing technologies can be used to share documentsand display information on whiteboards.

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