An algorithm for realtime high resolution octave analysis based on multirate signal processing theory

  • Authors:

  • Cheng Jin;Zhangwei Chen;Fengchun Gao

  • Affiliations:

  • State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang, P.R. China;State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang, P.R. China;State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang, P.R. China

  • Venue:
  • AMTA'07 Proceedings of the 8th WSEAS international conference on Acoustics & music: theory & applications
  • Year:
  • 2007

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Abstract

Octave analysis is widely used in acoustics. Traditional bandpass filtering based octave analysis algorithms could not meet today's real time high resolution analysis requirements because of the huge number bandpass filters they would need. To resolve this problem, a digital algorithm without using bandpass filtering is introduced in this paper. This algorithm is realized in frequency-domain and could be easily implemented on common DSP (Digital Signal Processing) systems. According to the experiments conducted on a digital dynamic signal analyzer based on DSP chips, this algorithm could meet the requirements of multi-channel real time octave analysis.