Multilevel data compression using a single compression engine
US7197077B2 · kind B2 · utility
2Cited by
10References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Sep 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single compression engine determines a plurality of discrete cosine transform (DCT) coefficients based on a discrete cosine transform of a plurality of blocks of data. The single compression engine provides first and second DCT-encoded signals. The first DCT-encoded signal uses at most t coefficient bits to represent each of the DCT coefficients. The second DCT-encoded signal uses at most u coefficient bits, where u is less than t, to represent each of the DCT coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.