Transformation block optimization method
US5825929A · kind A · utility
60Cited by
40References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jun 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transformation block optimization method provides transformation blocks of variable size for video compression processes. The method includes defining a transformation block of multiple pixels in an image frame and determining a peak signal-to-noise ratio for the transformation block. The transformation block is tentatively subdivided into subcomponents for which a signal-to-noise ratio is also obtained. The subcomponents are adopted as transformation blocks whenever the signal-to-noise ratios of the subcomponents are greater than the signal-to-noise ratio of the transformation block by more than a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.