Content use device and recording medium
US7760988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2005 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Oct 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unit 102 extracts a content name from playback control information in a playback path information table 210, and inquires of a rights management unit 108 whether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unit 102 extracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unit 102 then instructs a decryption unit 103 and a playback unit 107 to decrypt and play back encrypted content identified by the extracted content name.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.