Signal processing systems and methods using basis functions and wavelet transforms
First Claim
1. A method for determining physiological information, comprising:
- using a processor for;
receiving a signal;
using a plurality of basis functions to generate information about the signal;
performing a continuous wavelet transform of the signal for a plurality of scales selected based at least in part on the information generated using the plurality of basis functions; and
determining the physiological information based at least in part on the wavelet transform.
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Accused Products
Abstract
According to embodiments, systems and methods are provided that use continuous wavelet transforms and basis functions to provide an optimized system for the determination of physiological information. In an embodiment, the basis functions may be used to refine an area of interest in the signal in frequency or in time, and the continuous wavelet transform may be used to identify a maxima ridge in the scalogram at scales with characteristic frequencies proximal to the frequency or frequencies of interest. In another embodiment, a wavelet transform may be used to identify regions of a signal with the morphology of interest while basis functions may be used to focus on these regions to determine or filter information of interest. In yet another embodiment, basis functions and continuous wavelet transforms may be used concurrently and their results combined to form optimized information or a confidence metric for determined physiological information.
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Citations
19 Claims
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1. A method for determining physiological information, comprising:
using a processor for; receiving a signal; using a plurality of basis functions to generate information about the signal; performing a continuous wavelet transform of the signal for a plurality of scales selected based at least in part on the information generated using the plurality of basis functions; and determining the physiological information based at least in part on the wavelet transform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12)
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9. A method for determining physiological information, comprising:
using a processor for; receiving a signal; selecting an area of interest in the signal; performing a wavelet transform of the signal for a plurality of scales selected based at least in part on the area of interest; using a basis function to generate information about the signal based at least in part on the information generated using the wavelet transform; and determining the physiological information based at least in part on the basis function. - View Dependent Claims (10)
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13. A system for determining physiological information, comprising:
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a plurality of basis function calculators configured to generate information about a signal; a wavelet transform calculator configured to perform a wavelet transform of the signal for a plurality of scales selected based at least in part on the information generated by the plurality of basis function calculators; and a processor configured to determine physiological information based at least in part on the wavelet transform. - View Dependent Claims (14, 15)
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16. A non-transitory computer-readable medium for use in determining physiological information from a signal, the non-transitory computer-readable medium having computer program instructions recorded thereon for:
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using a plurality of basis functions to generate information about the signal; performing a wavelet transform of the signal for a plurality of scaled selected based at least in part on the information generated using the plurality of basis functions; and determining the physiological information based at least in part on the wavelet transform. - View Dependent Claims (17, 18, 19)
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Specification