Digital filtering methods and devices
US7058676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Dec 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In order to transform an input digital signal (xn) into one or more output digital signals (yn) containing even-indexed samples (y2n) and odd-indexed samples (y2i+n), this filtering method includes at least one iteration which contains an operation of modifying even-indexed samples (y2n) by a function (R) of weighted odd-indexed samples (y2n+1), and an operation of modifying odd-indexed samples (y2n+1) by a function (R) of weighted even-indexed samples (β0,j(y2n−y2n+2)). The weighted samples are obtained by at least one weighting operation. At least one of the weighting operations is applied to the difference between two consecutive even-indexed samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.