Data transfer system, data transfer apparatus, data recording apparatus, data transfer method, and recording medium
US7299499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2001 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | May 25, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A SDMI-compliant portable medium and a non-SDMI-compliant portable medium can be selectively connected to a licensed compliant module. When transferring copyright-protected encrypted content data from the licensed compliant module, whether the destination of transfer is the SDMI-compliant portable medium or the non-SDMI-compliant medium is determined. When the destination is found to be the SDMI-compliant portable medium, the number of times the encrypted content data can be transferred is restricted. When the destination is found to be the non-SDMI-compliant portable medium, the return (or check-in) of the encrypted content data from the non-SDMI-compliant portable medium to the licensed compliant module is disabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.