APPARATUS AND METHOD FOR LISTENING ROOM EQUALIZATION USING A SCALABLE FILTERING STRUCTURE IN THE WAVE DOMAIN

摘要

An apparatus for listening room equalization is provided. A system identification adaptation unit (120) is configured to adapt a first loudspeaker-enclosure-microphone system identification to obtain a second loudspeaker-enclosure-microphone system identification. A filter adaptation unit (130) is configured to adapt a filter (140) based on the second loudspeaker-enclosure-microphone system identification and based on a predetermined loudspeaker-enclosure-microphone system identification. A filter (140) comprises a plurality of subfilters (141, 14r) each of which receive one or more of the transformed loudspeaker signals. Each of the subfilters (141, 14r) 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 (141, 14r) is arranged to couple the at least two received loudspeaker signals to generate one of the plurality of the filtered loudspeaker signals. Moreover, at least one of the subfilters (141, 14r) has a number of the received loudspeaker signals that is smaller than a total number of the plurality of transformed loudspeaker signals.