Patent · US Active

Method and acoustic signal processing system for interference and noise suppression in binaural microphone configurations

US8909523B2 · kind B2 · utility

1Cited by

12References

14Claims

0Family size

Assignee

Siemens Medical Instruments Pte. Ltd. · SG

Inventors

Walter Kellermann · Eckental, DE
Klaus Reindl · Erlangen, DE
Yuanhang Zheng · Erlangen, DE

Key dates

Filing date	Jun 7, 2011
Grant date	Dec 9, 2014
Priority date	—
Expiry date	Oct 9, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2430/25
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method determines a bias reduced noise and interference estimation in a binaural microphone configuration with a right and a left microphone signal at a time-frame with a target speaker active. The method includes a determination of the auto power spectral density estimate of the common noise formed of noise and interference components of the right and left microphone signals and a modification of the auto power spectral density estimate of the common noise by using an estimate of the magnitude squared coherence of the noise and interference components contained in the right and left microphone signals determined at a time frame without a target speaker active. An acoustic signal processing system and a hearing aid implement the method for determining the bias reduced noise and interference estimation. The noise reduction performance of speech enhancement algorithms is improved by the invention. Further, distortions of the target speech signal and residual noise and interference components are reduced.

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