System method and apparatus for performing a transform on a digital image
US6697525B1 · kind B1 · utility
8Cited by
36References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1998 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Oct 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is embodied in a data compression encoder for use with the discrete cosine transform compression process. The invention enhances compression using the discrete cosine transform by utilizing a prediction engine that breaks the data received into predicted and unpredicted portions. The predicted portions are excluded from the discrete cosine transform reducing the time-required to compress a file. The prediction engine relies, in part, upon look-up tables that are used to determine the predicted blocks. A table build engine and database compiler are used to create the look-up tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.