Method for reducing noise in digital video information
US5519790A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/507
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing noise in digital video information is provided which includes the use of key frames, whereby pixel values for a key frame replace the corresponding pixel values for corresponding pixels of all subsequent frames prior to another key frame, as long as the pixel values being replaced do not differ from the key frame values by more than a predetermined threshold. A key frame, once established, is compared to a next frame to determine whether the next frame should be designated another key frame. The next frame should be designated another key frame when more than a predetermined portion of the pixels of the next frame differ from corresponding pixels of the original key frame by more than a predetermined threshold. The method proceeds recursively until all pixels of all frames are resolved by having their values replaced by key frame values. The method may include data compression as an integral part thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.