Noise reducer, noise reducing method, and video signal display apparatus that distinguishes between motion and noise
US8218083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Feb 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video noise reducer processes a frame difference signal equal to the difference between the video signal of the current frame and the video signal of the preceding frame or the difference between the video signal of the current frame and the noise-reduced video signal of the preceding frame to obtain a motion detection signal and a noise detection signal. The difference between the motion detection signal and the noise detection signal is then processed to obtain a recursion coefficient. The frame difference signal is multiplied by the recursion coefficient and the resulting product is additively combined with the video signal of the current frame to reduce noise without generating significant motion artifacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.