Method for real-time signal processing via wavelet transform

  • Authors:

  • Pavel Rajmic

  • Affiliations:

  • Department of Telecommunications, Faculty of Electrical Engineering and Communication Technologies, Brno University of Technology, Brno, Czech Republic

  • Venue:
  • NOLISP'05 Proceedings of the 3rd international conference on Non-Linear Analyses and Algorithms for Speech Processing
  • Year:
  • 2005

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Abstract

The new method of segmented wavelet transform (SegWT) makes it possible to compute the discrete-time wavelet transform of a signal segment-by-segment. This means that the method could be utilized for wavelet-type processing of a signal in “real time”, or in case we need to process a long signal (not necessarily in real time), but there is insufficient computational memory capacity for it (for example in the signal processors). Then it is possible to process the signal part-by-part with low memory costs by the new method. The method is suitable also for the speech processing, e.g. denoising the speech signal via thresholding the wavelet coefficients or speech coding. In the paper, the principle of the segmented forward wavelet transform is explained and the algorithm is described in detail.