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Method for talk/listen determination and multipoint conferencing system using such method

  • US 5,768,263 A
  • Filed: 10/20/1995
  • Issued: 06/16/1998
  • Est. Priority Date: 10/20/1995
  • Status: Expired due to Term
First Claim
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1. A method for determining a talk/listen state using a dynamic threshold, comprising:

  • receiving an audio sample representing sound measured during a sample time interval;

    generating an audio level from the audio sample, the audio level representing an average power level of the audio sample;

    setting a dynamic threshold by processing the audio level to set and maintain a dynamic level and using the dynamic level to determine a value for the dynamic threshold;

    comparing the audio level to the dynamic threshold;

    determining a talk/listen state to be a talking state if the audio level is above the dynamic threshold and to be a listening state if the audio level is below the dynamic threshold; and

    repeating the previous steps for each audio sample in a sequential stream of received audio samples such that the dynamic threshold is maintained and used to determine the talk/listen state.

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