Adaptive filter device and related method
US5970180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Sep 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decision is made as to which of a first segment and a second segment of an input picture signal more correlates to a third segment of the input picture signal. The third signal segment is of interest. The first signal segment precedes the third signal segment by a 2-field interval or a 4-field interval. The second signal segment follows the third signal segment by a 2-field interval or a 4-field interval. Calculation is made as to a difference between the third signal segment and the more-correlating signal segment for every pixel related to the input picture signal. Every 1-pixel-corresponding portion of the third signal segment and every 1-pixel-corresponding portion of the more-correlating signal segment are mixed into a 1-pixel-corresponding portion of a filtering-resultant picture signal at a mixing ratio depending on the calculated difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.