Method of and system for recording and reproducing information data
US7467305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Sep 4, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a system are provided for recording/reading information data using a first recording medium and a second recording medium each having its own identification data. The method comprises reading first encrypted information data encrypted in accordance with an identification data of the first recording medium and recorded in said first recording medium; encrypting the first encrypted information data in accordance with an identification data of the second recording medium, so as to produce second encrypted information data; recording the second encrypted information data in the second recording medium; reading the second encrypted information data from the second recording medium and decoding the second encrypted information data in accordance with the identification data of the second recording medium; and restoring the second encrypted information data into the first encrypted information data and recording the information data in the first recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.