Method and scalable architecture for parallel calculation of the DCT of blocks of pixels of different sizes and compression through fractal coding
US7233623B1 · kind B1 · utility
14Cited by
5References
8Claims
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Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Sep 16, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/99
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of calculating the discrete cosine transform (DCT) of blocks of pixels of a picture includes the steps of defining first subdivision blocks called range blocks, having a fractional and scaleable size N/2i*N/2i, where i is an integer number, with respect to a maximum pre-defined size of N*N pixels of blocks of division of the picture, referred to as domain blocks, shiftable by intervals of N/2i pixels. The method also includes the step of calculating the DCT on 2i range blocks of a subdivision of a domain block of N*N pixels of the picture, in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.