Motion adaptive noise reduction apparatus and method for video signals
US7199838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2004 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Aug 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20216
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video noise reduction system for a set of video frames that computes a first motion signal using a current frame and multiple consecutive previous frames, computes a second motion signal using the current frame and the processed preceding frame; computes the multi-frame temporal average of the current frame and multiple consecutive previous frames; computes the recursive average of the current frame and the processed preceding frame; generates a temporal filtered signal by soft switching between the multi-frame temporal average and the recursive average based on the first motion signal; applies a spatial filter to the current frame to generate a spatial filtered signal; and combines the temporal filtered signal and the spatial filtered signal based on the second motion signal to generate a final noise reduced video output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.