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Methods of establishing a communications link using perceptual sensing of a user's presence

  • US 20020163572A1
  • Filed: 11/13/2001
  • Published: 11/07/2002
  • Est. Priority Date: 11/10/2000
  • Status: Active Grant
First Claim
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1. A method of sensing whether a person is present within a predefined space and, if present, what their activity state is, comprising the steps of:

  • periodically generating an image of a scene including said predefined space;

    comparing successive images of said scene and determining whether differences between said successive images are due to arrival or departure of a person; and

    monitoring sounds in said predefined space to determine whether speech is coming from a person detected in at least one of said successive images.

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