Non-stationary filter design and application for seismic signals
US6556922B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/364
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of designing and applying filters for geophysical time series data comprising obtaining a plurality of spatially related geophysical time series and transforming the time series using a wavelet transformation. The wavelet transformation coefficients may be organized into a plurality of subband traces. The method includes modifying one or more transform coefficients within a plurality of the subband traces or within all but one of the subbands of traces and then inverting the subband traces using an inverse transform to produce a filtered version of the transformed portion of the geophysical time series. The method allows for design and analysis of non-stationary filters and filter parameters in untransformed data space. Non-stationary signals may be filtered in all or in windowed portions of the geophysical time series data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.