Method and apparatus for subband coding images
US5631978A · kind A · utility
13Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1992 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | May 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This technique for coding images involves filtering the original input image into subband images using successive high-pass and low-pass filterings over a tree-shaped filter with each tree filtering stage involving re-scaling operations adjusted to keep the subband image signal dynamics substantially stable throughout the filtering tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.