Parametric approximation of room impulse responses by multirate systems

  • Authors:

  • M. Schoenle;N. Fliege;U. Zoelzer

  • Affiliations:

  • Technical University of Hamburg, Hamburg, Germany;Technical University of Hamburg, Hamburg, Germany;Technical University of Hamburg, Hamburg, Germany

  • Venue:
  • ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: plenary, special, audio, underwater acoustics, VLSI, neural networks - Volume I
  • Year:
  • 1993

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this paper, we propose a new approach to the approximation and real-time simulation of room impulse responses. A time-frequency representation of impulse response data is obtained by wavelet decomposition using a multirate analysis filter bank. In a second step the parameters of cascaded moving average comb filter structures in the frequency subbands are calculated. Combining the output signals of the subband models by a synthesis filter bank with perfect reconstruction properties gives an approximation of the broadband impulse reponse. Due to the multirate signal decomposition with a high frequency resolution at low frequencies very long room impulse responses can be modeled accurately and simulated in real-time.