Videoconferencing is a teleconference using video technology, such as closed-circuit television. Simple analog videoconferences could be established as early as the invention of the television. Such videoconferencing systems consisted of two closed-circuit television systems connected via cable. During the first manned space flights, NASA used two radiofrequency (UHF or VHF) links, one in each direction. TV channels routinely use this kind of videoconferencing when reporting from distant locations, for instance. Then mobile links to satellites using special trucks became rather common.
Although the first videoconferencing was done with traditional analog TV and satellites, inhouse room systems became popular in the early 1980s after Compression Labs pioneered digitized video systems that were highly compressed. While videoconferencing may comprise any number of end points communicating, the term "video chat" typically means between two end points only.
Multipoint videoconferencing
Simultaneous videoconferencing among three or more remote points is possible by means of a Multipoint Control Unit (MCU). This is a bridge that interconnects calls from several sources (in a similar way to the audio conference call). The advantages of this technique are that the video and audio will generally be of higher quality because they don't have to be relayed through a central point. Also, users can make ad-hoc multipoint calls without any concern for the availability or control of an MCU.
Components of videoconferencing System
Following are the basic components of a videoconferencing system
• Codec
• Camera
• Control system
• Display equipment
• Audio system
Benefits of Videoconferencing
• Increased Productivity
• Increased Participation
• Improved Competitive Advantage
• Shortened Business Cycles
• Reduced Travel Costs
• Reduced Travel Stress
Technology used in videoteleconference
The core technology used in a videoteleconference (VTC) system is digital compression of audio and video streams in real time. The hardware or software that performs compression is called a codec (coder/decoder).
The other components required for a VTC system in
• Video input: video camera or webcam.
• Video output: computer monitor or television.
• Audio input: microphones.
• Audio output: usually loudspeakers associated with the display device or telephone.
• Data transfer: analog or digital telephone network, LAN or Internet.
Importance of Videoconferencing
Prevents wasted time and money, on travel or transportation, for brief meetings.
• Over 60% of face-to-face communication is non verbal. Therefore, an enriched communications tool, such as videoconferencing can promote an individual’s or a team’s identity, context and emotional situation.
• 56% of business professionals waste an estimated 30+ minutes a day using inefficient communication methods; costing businesses an estimated $297 billion annually.
• Brings the latest technology with reliable and easy-to-use conferencing and collaboration to your meetings.
• Enterprises that fail to use modern communications technologies run the very real risk of falling behind their competition.
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