Imported: 23 Feb '17 | Published: 22 Oct '02
USPTO - Utility Patents
An apparatus and method in a video conference system provides accurate determination of the position of a speaking participant by measuring the difference in arrival times of a sound originating from the speaking participant, using as few as four microphones in a 3-dimensional configuration. In one embodiment, a set of simultaneous equations relating the position of the sound source and each microphone and relating to the distance of each microphone to each other are solved off-line and programmed into a host computer. In one embodiment, the set of simultaneous equations provide multiple solutions and the median of such solutions is picked as the final position. In another embodiment, an average of the multiple solutions are provided as the final position.
b show the analytical solutions for speaker location (x, y and z) solved using equation groups y
b) illustrate a method for adjusting detected speaker position to minimize steering a camera to a erroneously calculated sound source position.
b) illustrate a method for minimizing undesirable camera movements, by dividing the field seen by a camera into 3-dimensional zones.
1. A method for locating a speaking participant in a video conference, comprising:
2. A video conference system, comprising:
3. A video conference system, comprising:
4. A system as in
5. A video conference system, comprising:
6. A system as in
7. A system as in
8. A system as in