A videoconference

(Videoteleconference) is a set of interactive telecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously. It has also been called visual collaboration and is a type of groupware. It differs from videophone in that it is designed to serve a conference rather than individuals.


Technology used in VC
The core technology used in a video teleconference (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).


Video conferencing can be used for:
* Recruitment interviews
* Giving evidence to Magistrates or Crown Court
* In house business presentations
* Product training for employees and clients
* Sales representations and product launches
* Design and creative assessment, project liaison
* Business to business consultancy services
* Casting for television production


The other components required for a VTC system include:
Video input: video camera or webcam
Video output: computer monitor , television or projector
Audio input: microphones
Audio output: usually loudspeakers associated with the display device or telephone
Data transfer: analog or digital telephone network, LAN or Internet


VC impact on education
* Videoconferencing provides students with the opportunity to learn by participating in a 2-way communication platform.
* Teachers and students from all over the world can be brought to classes in remote or otherwise isolated places.
* Students are able to explore, communicate, analyze and share information and ideas with one another, visit another part of the world to speak with others, ,conduct virtual field trips.
* Small schools can use this technology to pool resources and teach courses.
* Faculty member keeps in touch with class while gone for a week at a conference.
* Guest lecturer brought into a class from another institution.
* Researcher collaborates with colleagues at other institutions on a regular basis without loss of time due to travel.
* Faculty committee auditions a scholarship candidate.
* Researcher answers questions about a grant proposal from an agency or review committee.
* Student interviews with an employer in another city.
* Teleseminars: (Teleseminars are used to provide information, training, or promote or sell products to group of people interested in a particular topic. They are similar to traditional seminars, in content and purpose, but they are given over a teleconference or bridgeline rather than at a specific location).