×

Multi-point video conference control apparatus

  • US 5,774,457 A
  • Filed: 11/18/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 11/21/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A multi-point video conference control apparatus comprising:

  • first signal separation means for separating a multiplexed signal transmitted from a specific first terminal station into video and speech signals;

    first multiplexed signal selection means for selecting one of multiplexed signals transmitted from a plurality of second terminal stations other than said first terminal station;

    second signal separation means for separating the multiplexed signal selected by said first multiplexed signal selection means into video and speech signals;

    speech signal addition means for adding the speech signals output from said first and second signal separation means;

    video signal selection means for selecting one of the video signals output from said first and second signal separation means;

    talk request signal detection means for detecting a talk request signal indicating a talk request transmitted from one of said second terminal stations;

    first selection instructing means for, when a talk request signal is detected, instructing said first multiplexed signal selection means to select a multiplexed signal from one of said second terminals which is a talk request source on the basis of the detected talk request signal;

    second selection instructing means for instructing said video signal selection means to select a video signal from said second signal separation means when a talk request signal is detected, and instructing said second selection instructing means to select a video signal from said first signal separation means when no talk request signal is detected by said talk request signal detection means;

    first signal multiplexing means for multiplexing the video signal selected by said video signal selection means and the speech signal output from said speech addition means; and

    signal distribution means for, when a talk request signal is detected, transmitting a signal based on the multiplexed signal transmitted from said first terminal station to one of said second terminal stations which is the talk request source, and transmitting the multiplexed signal from said first signal multiplexing means to said second terminal stations other than the talk request source, and when a talk request is not detected by said talk request signal detection means, transmitting the multiplexed signal from said first signal multiplexing means to all said second terminal stations.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×