Patent · US Active

System for processing microphone signals to provide an output signal with reduced interference

US8189810B2 · kind B2 · utility

37Cited by

8References

23Claims

0Family size

Assignee

Nuance Communications, Inc. · US

Inventors

Tobias Wolff · Neu-Ulm, DE
Markus Buck · Biberach, DE

Key dates

Filing date	May 22, 2008
Grant date	May 29, 2012
Priority date	—
Expiry date	Feb 6, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG10L2021/02166
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A system reduces noise or other external signals that may affect communication. A device converts sound from two or more microphones into an operational signal. Based on one or both signals, a beamformer generates an intermediate signal. Reflected or other undesired signals may be estimated or measured by an echo canceller. Interference may be measured or estimated by processing the echo-reduced signal or estimate by a blocking matrix. An interference canceller may reduce the interference that may modify or disrupt a signal based on the output of the blocking matrix and the intermediate signal.

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