Koninklijke Philips Corporation N.v.

Koninklijke Philips Electronics N.v.

Rainer Thaden

Cornelis Pieter Janse

David Antoine Christian Marie Roovers

Cornelis P Janse

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.

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Eindhoven, Netherlands

Rainer Thaden