Insertion of supplementary information in digital data
US7499546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/328
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method of inserting a suppementary information item in a set of data reprenting physical quantities, the data having been processed by the steps of, a) partitioning (E2) the set into subsets, b) entropic coding (E4) of each of the subsets, c) selecting (E8), for each of the subsets, a compression rate and distortion pair according to a global compression rate or a global distortion, d) writing, for each of the subsets, an index (Tij) representing the selected compression rate and distortion pair, in a file containing the coded subsets, characterised in that it also includes a step (E11) of modifying the selected compression rate and distortion pairs, according to the supplementary information (wm).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.