The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2008
Filed:
Oct. 08, 2004
Mark W. Johnson, Cleveland Hts, OH (US);
Mark W. Johnson, Cleveland Hts, OH (US);
Other;
Abstract
A method for displaying changes in spectral content of data signals over periods of time using a computer system. The method includes the steps of transforming time segments of digitized data signals into a frequency based spectral representation of the digitized data. The resulting spectral data are then grouped into appropriate frequency bins. Each frequency bin is normalized by the frequency range of the bin. The energy or power in each frequency bin is then multiplied by f, where f represents an estimate of the frequency of the bin, and n is an exponent which is used to normalize the frequency content of the data. A logarithmic value is then calculated for each frequency bin. The logarithmic value of each frequency bin for each time period is then mapped to a color or gray-scale value. Finally, the mapped color or gray-scale value is displayed on a computer monitor in the computer system as an image, where the signal frequency is represented along one axis, time is represented along a second axis, and the value of the energy or power at that given time and frequency is displayed as the color or gray-scale value assigned to that point.