×

Methods and apparatus for source location estimation from microphone-array time-delay estimates

  • US 5,737,431 A
  • Filed: 03/07/1995
  • Issued: 04/07/1998
  • Est. Priority Date: 03/07/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for determining a location of a source that generates source signals, comprisingA. at least three sensors arranged in a plurality of sets, each set including two or more of sensors,B. surface-finding means, coupled with said sensors, for responding to receipt of a source signal by the sensors of each set for identifying a geometric surface representing a locus of potential source locations, said geometric surface being defined as a function of locations of the sensors in that set and a time difference of arrival of the source signal at those sensors, andC. location-approximating means for generating a location signal, said location-approximating means being coupled to said surface-finding means and includingi) identification means for identifying a line representing a further constrained locus of potential source locations, said line being defined as a function of an intersection of surfaces identified by two or more of said sensor sets,ii) intersection-finding means for generating said location signal representing a location of said source as a function of points of closest intersection of a plurality of said lines.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×