System for adjusting size and scale of digital filters and creating digital filters
US6167414A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1998 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jun 11, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a technique of scaling a digital filter and of adjusting the width of a digital filter. The technique involves truncating a filter, attenuating its new endpoints and then adjusting the truncated filter by mixing in linear combinations of a set of basis vectors in a way which preserves the linearly defined properties of the original filter. A filter can also be created by defining a spectrum of the filter using a large number of points, performing a Fourier transform on the filter spectrum creating a spatial filter, and reducing a size of the spatial filter by truncating the spatial filter producing a truncated filter and combining the truncated filter with a set of basis vectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.