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Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames

  • US 20030185408A1
  • Filed: 03/29/2002
  • Published: 10/02/2003
  • Est. Priority Date: 03/29/2002
  • Status: Active Grant
First Claim
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1. A signal processor for de-noising an input signal, said signal processor including a memory for storing said input signal as an array A1 of a plurality of component frames, and a processor configured to:

  • (a) perform a wavelet transform on each of said component frames to thereby create a corresponding array of wavelet coefficients;

    (b) iteratively for at least one repetition (i) combine multiple numbers of said wavelet coefficients into a plurality of resultant wavelet coefficients forming an array A2 of a like number 2N of wavelet coefficients, each of said resultant wavelet coefficients being formed from a different combination of wavelet coefficients determined from the original set of wavelet coefficients or the previous iteration, as appropriate; and

    (ii) wavelet de-noising each resultant wavelet coefficient of array A2; and

    (c) combine the resultant wavelet coefficients resulting from the last iteration to form a combined resultant wavelet coefficient.

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