Low-cost room-based video conferencing systems

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G06F 1700

Patent

active

056755120

ABSTRACT:
A low cost room-based videoconferencing system for videoconferencing between many stations. In the invention, each station includes a computer running a windowing operating system and PROSHARE. It also includes a communication link connecting the computer and one or more of the videoconferencing stations. In addition there are video and audio input devices connected to the computer. A DCI-enabled video card is connected to the computer. A NTSC converter is connected to the output of the DCI enabled graphics card and one or more NTSC television monitors are connected to the NTSC converter. PROSHARE manages the videoconferencing sessions and provides a small video image. The DCI-enabled video card stretches the small PROSHARE image to a full screen image which is then converted by the NTSC converter and displayed on an inexpensive NTSC television monitor.

REFERENCES:
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patent: 5557728 (1996-09-01), Garrett et al.
Soares et al. "Lan Based Real Time Audio-Graphics Conferencing System." IEEE 1989.
Lake et al.; "A Network Environment For Studying Multimedia Network Architecture And Control." IEEE 1989.
Ahuja et al.; "Networking Requirements Of The Rapport Multimedia Conferencing System." IEEE 1988.
Handmade Software, Inc.;"Image Alchemy" 1991.

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