Detection of Gaussian noise in video signals
US6433819B1 · kind B1 · utility
15Cited by
3References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for the detection of Gaussian noise in a video signal decomposes an image from the video signal to obtain best qualified blocks having a relatively uniform luminance. From the best qualified blocks an average standard deviation is calculated, and then smoothed by temporal filtering. The filtered average standard deviation is finally calibrated against a scale of corresponding input noise levels to obtain the Gaussian noise in the video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.