Patent · US Expired

Method and device for noise reduction

US7657038B2 · kind B2 · utility

30Cited by

6References

19Claims

0Family size

Assignee

Cochlear Limited · AU

Inventors

Simon Doclo · Oldenburg, DE
Ann Spriet · Oud-Heverlee, BE
Marc Moonen · Herent, BE
Jan Wouters · Holsbeek, BE

Key dates

Filing date	Jul 12, 2004
Grant date	Feb 2, 2010
Priority date	—
Expiry date	Aug 13, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2430/25
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In one aspect of the present invention, a method to reduce noise in a noisy speech signal is disclosed The method comprises: applying at least two versions of the noisy speech signal to a first filter, whereby that first filter outputs a speech reference signal and at least one noise reference signal, applying a filtering operation to each of the at least one noise reference signals, and subtracting from the speech reference signal each of the filtered noise reference signals, wherein the filtering operation is performed with filters having filter coefficients determined by taking into account speech leakage contributions in the at least one noise reference signal.

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