System for processing an information signal
US7050588B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/1675
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for processing an information signal comprises a system (1) for scrambling the information signal and at least one system (2) for descrambling the scrambled information signal. The scrambling system (1) comprises means (3,6) for analysing the entropy distribution of the information signal, means (5,6,7,9) for scrambling the information signal in dependence on the entropy distribution of the information signal to provide a scrambled information signal having an entropy distribution corresponding with the entropy distribution of the information signal and means (11) for compressing the scrambled information signal. The descrambling system (2) comprises means (14) for decompressing the compressed scrambled information signal and means (16,19,21,22,24) for descrambling the scrambled information signal to provide the information signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.