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Multi-point video conference system

  • US 6,008,838 A
  • Filed: 08/28/1997
  • Issued: 12/28/1999
  • Est. Priority Date: 08/29/1996
  • Status: Expired due to Fees
First Claim
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1. A multi-point video conferencing system comprising:

  • a plurality Of CODECs which are set at multiple points and participate in a conferences; and

    a multi-point control unit for transmitting/receiving voice signals and video signals between said CODECs, said multi-point control unit includinga plurality of voice level measuring means for measuring levels of voice signals input from said CODECs and for outputting a corresponding plurality of measurement results representing the levels of said voice signals;

    voice level adjusting means, for receiving said plurality of voice signal levels and said voice signals input from said CODECs, and for outputting a plurality of adjusted voice signals in response, said adjusted voice signals being adjusted to substantially the same level in response to the measurement results obtained by said voice level measuring means;

    mixing means for adding the adjusted voice signals output from said voice level adjusting means, and outputting a sum voice signal, from which the voice signals corresponding to each of said CODECs at transmission destinations is removed, to each of said CODECs; and

    video signal processing means for performing signal processing for video signals input from said CODECs, and outputting the video signal from a talk CODEC to which a last talker belongs to all said CODECs.

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