The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Jun. 16, 2008
Rainer Thaden, Eindhoven, NL;
Cornelis Pieter Janse, Eindhoven, NL;
David Antoine Christian Marie Roovers, Eindhoven, NL;
Rainer Thaden, Eindhoven, NL;
Cornelis Pieter Janse, Eindhoven, NL;
David Antoine Christian Marie Roovers, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A method is provided which is suitable to cope with non-linear echo paths during acoustic echo cancellation in speakerphones. Non-linear paths occur particularly in hands-free operation of, e.g., a mobile phone, due to driving the amplifier and loudspeaker in the non-linear range. The idea is to combine the commonly known one microphone approach of linear acoustic echo cancellation using an adaptive filter and a post-processor together with a multiple microphone approach using beam forming which separately removes the non-linear part of the echo.