Video Conference Service
A videoconference or video conference (also known as a 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.
Print 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). Compression rates of up to 1:500 can be achieved. The resulting digital stream of 1s and 0s is subdivided into labelled packets, which are then transmitted through V.Sat. The use of audio modems in the transmission line allow for the use of POTS, or the Plain Old Telephone System, in some low-speed applications, such as videotelephony, because they convert the digital pulses to/from analog waves in the audio spectrum range.
The other components required for a video conference system include: • Video input : video camera or webcam • Video output: computer monitor , television or projector • Audio input: microphones, CD/DVD player, cassette player, or any other source of PreAmp audio outlet. • Audio output: usually loudspeakers associated with the display device or telephone • Data transfer: analog or digital telephone network, LAN or Internet.
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