Method for detecting and removing errors exceeding a specific contrast in digital video signals
US5606631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Oct 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/945
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting and removing errors in pictures associated with a picture sequence in digital video sigals is disclosed. For this purpose an error detector and a filter for continuous processing of pixels associated with said pictures is used. The error detector detects an error if at least one error pixel, being a pixel with a specific contrast, i.e. difference in pixel intensities, is found when comparing the pixel intensities of pixels belonging to at least two pictures in said picture sequence. The error detector determines an error shape, and the filter which is an adaptive filter, replaces the intensity of a current error pixel with a mathematical function of pixel intensities of the current pixel and pixels surrounding the error shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.