Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames
US7054454B2 · kind B2 · utility
101Cited by
8References
45Claims
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Key dates
| Filing date | Mar 29, 2002 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Feb 2, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/27
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of wavelet de-noising a data set comprised of a new set of frames of wavelet coefficients partially generated through a cyclic shift algorithm. The method preferably operates on a data set having 2N frames, and the iteration is performed N−1 times. The resultant wavelet coefficients are then linearly averaged and an inverse discrete wavelet transform is performed to arrive at the de-noised original signal. The method is preferably carried out in a digital processor.
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