Method and apparatus for encoding a digital motion video signal using pyramid specific filtering
US5331414A · kind A · utility
23Cited by
10References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1991 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Dec 23, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image having at least one high frequency feature is encoded by (a) filtering the image to produce a filtered image representing the image minus the at least one high frequency feature; (b) resolving the filtered image into at least one lower level of resolution; (c) encoding a correction image at the at least one lower level of resolution; (d) producing an expanded result image having the same the level of resolution of the image; and (e) encoding at the level of resolution the image the difference between the image and the expanded result image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.