Patent · US Active

Beamforming pre-processing for speaker localization

US8660274B2 · kind B2 · utility

52Cited by

1References

12Claims

0Family size

Assignee

Nuance Communications, Inc. · US

Inventors

Tobias Wolff · Neu-Ulm, DE
Markus Buck · Biberach, DE
Gerhard Uwe Schmidt · Ulm, DE

Key dates

Filing date	Jul 16, 2009
Grant date	Feb 25, 2014
Priority date	—
Expiry date	Jul 11, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2430/23
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Embodiments of the present invention relate to methods, systems, and computer program products for signal processing. A first plurality of microphone signals is obtained by a first microphone array. A second plurality of microphone signals is obtained by a second microphone array different from the first microphone array. The first plurality of microphone signals is beamformed by a first beamformer comprising beamforming weights to obtain a first beamformed signal. The second plurality of microphone signals is beamformed by a second beamformer comprising the same beamforming weights as the first beamformer to obtain a second beamformed signal. The beamforming weights are adjusted such that the power density of echo components and/or noise components present in the first and second plurality of microphone signals is substantially reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.