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Symmetric Loudspeaker-Room Equalization Utilizing
a Pairwise Channel Similarity Criterion.
Adrian Bahne
,
Lars-Johan Brännmark,
and
Anders Ahlén
IEEE Transactions on Signal Processing
, vol. 61, no. 24, pp. 6276-6290, December 2013.
© 2013 IEEE
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Abstract:
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Similarity of the room transfer functions (RTFs) of
symmetric channel pairs is crucial for correct sound reproduction
of, for example, stereophonic or 5.1 surround multichannel recordings.
This physical and psychoacoustical insight yielded the filter
design framework presented in this paper. The filter design framework
introduced is based on MIMO feedforward control. It has
the aim of pairwise equalization of two audio channels and incorporates
two features.
In the first place, each channel is individually
equalized by minimizing the difference between a desired target
response and the original RTF by means of support loudspeakers.
The second and novel feature represents the similarity requirement
and aims at minimizing the difference between the compensated
RTFs of the two channels.
In order to asses the proposed method
a measure of RTF similarity is proposed. Tests with measurements
of two different multichannel audio systems proved the method to
be able to significantly improve the similarity of two RTFs.
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Related publications:
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PhD Thesis
by Adrian Bahne
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Conference paper 2012
on the same subject.
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Paper in IEEE TASLP 2013
on compensation of loudspeaker-room responses in a
robust MIMO control framework.
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Audio research at Signals and Systems
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Main
entry in list of publications
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