Method and device for filtering a video signal
US7318079B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 2004 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Feb 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and device operable per the method for high-pass filtering an input signal having a sequence of signal values to provide a high-pass filtered output signal having a sequence of filtered signal values. The method includes selecting a first signal value of the input signal and a second signal value preceding the first signal value and a third signal value following the first signal value, determining an interval defined by the second and third signal values, determining a mean value of the interval, and determining whether the first signal value lies within the interval. If the first signal value lies outside the interval, determining a first distance between the first signal value and a first interval boundary and a second distance between the first signal value and a second interval boundary and a third distance between the first signal value and the mean value to provide a first, a second, and a third distance value, and selecting a signal value from a value range between the smaller of the first and second distance values and the third distance value to provide a selected signal value. If the first signal value lies within the interval, selecting a signal value from a va…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.