Patent · US Active

Adjusted noise suppression and voice activity detection

US8831686B2 · kind B2 · utility

4Cited by

0References

22Claims

0Family size

Assignee

BlackBerry Limited · CA

Inventors

Per Magnus Fredrik Hansson · Everöd, SE
Philippe Moquin · Gatineau, CA

Key dates

Filing date	Jan 30, 2012
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Jan 30, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04M2250/12
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Dual microphones can be used to improve noise suppression by better distinguishing between speech and background noise. If the user does not hold the handset according to a prescribed orientation, however, the dual microphone noise suppression can actually do a worse job than a single microphone noise suppression algorithm because of mistakes made distinguishing between speech and noise. Here it is proposed to use an accelerometer to determine the orientation of the phone and use this orientation information in the noise suppression algorithm. Also when a person speaks, the vibrations when the device is held against the head can be used to detect speech.

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