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Room impulse response shortening with infinity-norm optimization

: Mei, T.; Mertins, A.; Kallinger, M.


IEEE Signal Processing Society:
IEEE International Conference on Acoustics, Speech, and Signal Processing 2009. Proceedings. Vol.7 : April 19 - 24, 2009, Taipei International Convention Center, Taipei, Taiwan
Piscataway/NJ: IEEE, 2009
ISBN: 978-1-4244-2354-5
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <34, 2009, Taipei>
Fraunhofer IIS ()

The purpose of room impulse response (RIR) shortening is to improve the intelligibility of the received signal by pre-fltering the source signal before it is played with a loudspeaker in a closed room. In this paper, we propose to use the infinity-norm as optimization criterion for the design of shortening filters of RIRs. Similar to the equiripple filter design method, design errors will be uniformly distributed over the unwanted temporal range of the shortened global impulse response. The D50 measure is exploited during the design of the shortening filter, which makes it possible to significantly reduce the length of the prefilter without affecting the perceived performance.