Patent · US Expired

Noise reduction method with self-controlling interference frequency

US7020291B2 · kind B2 · utility

27Cited by

5References

9Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Markus Buck · Biberach, DE
Tim Haulick · Blaubeuren, DE
Klaus Linhard · Neu-Ulm, DE

Key dates

Filing date	Apr 12, 2002
Grant date	Mar 28, 2006
Priority date	—
Expiry date	Aug 14, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG10L2021/02165
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The present invention relates to a method with which speech is captured in a noisy environment with as high a speech quality as possible. To this end, a compact array of, for example, two single microphones is combined to form one system through signal processing methods consisting of adaptive beam formation and spectral subtraction. Through the combination with a spectral subtraction, the reference signal of the beam former is freed from speech signal components to the extent that a reference signal of the interference is formed and the beam former produces high gains.

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