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Improved Loudspeaker-Room Equalization for Stereo
Systems Regarding Channel Similarity.
Adrian Bahne
,
Lars-Johan Brännmark,
and
Anders Ahlén
IEEE/IET International Conference on Audio,
Language and Image Processing, ICALIP2012
, Shanghai, China, 16-18 July 2012, pp. 254-259.
DOI:
10.1109/ICALIP.2012.6376621
© 2012 IEEE
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Abstract:
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In this paper, a new approach to robust single-channel
loudspeaker - room equalization for stereo systems
based on psychoacoustic insights is presented.
Traditionally, in single-channel equalization each channel
is equalized individually according to a desired target.
In case the target cannot be reached for at least one
of the two channels, this approach results in different
loudspeaker - room transfer functions of the two channels
at the listening position.
However, reproducing the intended sound image of stereo
recordings requires equal acoustic transfer functions
from the input to the two loudspeakers to the listening region.
In this paper we aim not only at equalizing the individual
channels according to a desired target, but also at
explicitly requiring symmetry between the two channels
of a stereo system.
To this end we propose a two-channel similarity SIMO
controller structure, which is an extension to an
earlier approach by the authors. The new approach
is evaluated based on measurements in a room and
is found to reduce differences between the room
transfer functions of the two channels in both
frequency and time domain.
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Related publications:
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PhD Thesis
by Adrian Bahne
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Later Paper in IEEE SP 2013
on symmetric loudspeaker-room equalization
utilizing a pairwise channel similarity criterion.
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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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