Method of graphics data compression
Abstract
The method of compression of graphics data, used for the coding of images in points mode (bitmap data), data consisting of a succession of addresses of a conversion table called symbols S, is characterized in that it comprises the following stages:a run-length coding (2) of the symbols so as, for each range of identical successive symbols, to give a number L corresponding to the number of identical symbols, associated with the symbol S,a variable-binary-resolution coding of L (3) as a function of the value of L. Applications relate particularly to coding and decoding of OSD (On Screen Display) data.

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1 sheet
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Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0680030A1 | Cites | European Patent Office (EPO) | X | Search report | 1 |
| EP0720347A2 | Cites | European Patent Office (EPO) | A | Search report | 1-10 |
| US5727090A | Cites | United States of America | X | Search report | 2,6 |
| US5740345A | Cites | United States of America | A | Search report | 1-10 |
10 members in 5 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 9811627 | France | A | |
| 9811627 | France | – | |
| 9811627 | – | – | – |
| FR19980011627 | – | – | – |
Members10
| Document | Office | Kind | |
|---|---|---|---|
| EP0987656A2 | European Patent Office (EPO) | A2 | |
| FR2783661A1 | France | A1 | |
| CN1248863A | China | A | |
| JP2000101446A | Japan | A | |
| FR2783661B1 | France | B1 | |
| EP0987656A3This record | European Patent Office (EPO) | A3 | |
| CN1151679C | China | C | |
| JP4406481B2 | Japan | B2 | |
| EP0987656B1 | European Patent Office (EPO) | B1 | |
| DE69942927D1 | Germany | D1 |
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Numbers
- Publication
- 0987656
- Publication, DOCDB
- 0987656
- Publication, EPODOC
- EP0987656
- Application
- 99402225
- Application, DOCDB
- 99402225
- Application, EPODOC
- EP19990402225
Titles3
- German
- Verfahren für grafische Datenkomprimierung
- English
- Method of graphics data compression
- French
- Méthode de compression de données graphiques
Classification
- CPC, 2
- H03M7/46
- G06T9/005
- IPC, 4
- H04N5 445
- G06T9 00
- H03M7 46
- H04N7 26
Designated states2
- Contracting states, 1
- Sweden
- Extension states, 1
- Slovenia