Spatio-temporal video noise reduction system
US7145607B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 1999 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Nov 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for digital video noise reduction which includes a picture analyser (103) for analysing pictures in a video sequence to determine the amount of moving regions therein, a noise level detector (102) for estimating the noise level (N) in the video sequence, a filtering level estimator (105, 103) for determining a maximum filtering level (L) for each picture based on the amount of moving regions and the estimated noise level (N) and a spatial filter (106) and a temporal filter (107), the temporal filter being coupled to the filter level estimator for controlling the level of filtering of each picture in the sequence in accordance with the maximum filtering level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.