Patent · US Active

Apparatus and method for listening room equalization using a scalable filtering structure in the wave domain

US9338576B2 · kind B2 · utility

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9Claims

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Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Martin Schneider · Erlangen, DE
Walter Kellermann · Eckental, DE

Key dates

Filing date	Mar 26, 2014
Grant date	May 10, 2016
Priority date	—
Expiry date	Nov 13, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/13
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus for listening room equalization is provided. A system identification adaptation unit is configured to adapt a first loudspeaker-enclosure-microphone system identification to obtain a second loudspeaker-enclosure-microphone system identification. A filter adaptation unit is configured to adapt a filter based on the second loudspeaker-enclosure-microphone system identification a predetermined loudspeaker-enclosure-microphone system identification. A filter includes a plurality of subfilters each of which receive one or more of the transformed loudspeaker signals. Each of the subfilters is adapted to generate one of a plurality of filtered loudspeaker signals based on the one or more received loudspeaker signals. At least one of the subfilters is arranged to couple the at least two received loudspeaker signals to generate one of the plurality of the filtered loudspeaker signals. At least one of the subfilters has a number of the received loudspeaker signals that is smaller than a total number of the plurality of transformed loudspeaker signals.

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