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Videoconference system

  • US 5,991,276 A
  • Filed: 04/21/1997
  • Issued: 11/23/1999
  • Est. Priority Date: 11/19/1996
  • Status: Expired due to Fees
First Claim
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1. A multipoint videoconference system constructed on an ATM network, comprising:

  • first communications channels established as part of the ATM network;

    second communications channels established as part of the ATM network, having transmission rates lower than those of said first communication channels;

    a plurality of videoconference terminals each of which comprises;

    transmission means for transmitting video and voice signals over said first communications channels, and material data signals over said second communications channels, wherein the material data signals convey still images, text data, and mouse position data which are produced locally at each said videoconference terminal,reception means for receiving rearranged video and voice signals sent over said first communications channels, and receiving collected material data signals sent over said second communications channels, anddisplay means for displaying images produced from the collected material data signals received by said reception means on a monitor screen, together with motion images produced from the rearranged video and voice signals received by said reception means;

    a videoconference server which rearranges the video and voice signals, and the material data signals received from said plurality of videoconference terminals over said first and second communications channels, and sends the rearranged video and voice signals and the collected material data signals back to the plurality of videoconference terminals via said first and second communications channels, respectively; and

    a videoconference administration server which controls network connections between said videoconference server and said plurality of videoconference terminals.

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