Signal processing method and apparatus
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United States of America Patent
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May 4, 2021
Grant Date -
Nov 23, 2017
app pub date -
Dec 8, 2015
filing date -
Dec 8, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for estimating the frequency of a dominant periodic component in an input signal by modelling the input signal using auto-regressive models of several different orders to generate candidate frequencies for the periodic component, generating synthetic sinusoidal signals of each of the candidate frequencies, and calculating the cross-correlation of the synthetic signals with the original signal. The frequency of whichever of the synthetic signals has the highest cross-correlation with the original signal is taken as the estimate of the frequency for the dominant periodic component of the input signal. The method may be applied to any noisy signal which has a suspected periodic component, for example physiological signals such as photoplethysmogram signals, and in the estimation of heart rate and breathing rate from such physiological signals.
First Claim
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Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| GB | D0 | GB201421786 | Dec 08, 2014 |
| EP | B1 | EP3230751 | Dec 08, 2015 |
| WO | A1 | WO2016092291 | Dec 08, 2015 |
International Classification(s)
- 2015 Application Filing Year
- A61B Class
- 16562 Applications Filed
- 12933 Patents Issued To-Date
- 78.09 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- A61B Class
- 0 % this patent is cited more than
- 4 Age
Maintenance Fees
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| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Nov 4, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 4, 2032 |
