Playback apparatus and playback control method
US7664262B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Sep 29, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2579
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, there is provided a playback apparatus which plays back content including an encrypted video object and an encrypted resource file, including a memory including a file cache area, a module configured to decrypt the video object, a playback process module configured to play back the decrypted video object and to output a resource file acquisition request, a module configured to determine whether the resource file is decrypted, to decrypt the resource file, to write the decrypted resource file over the encrypted resource file, to update the management information, and to send the decrypted resource file to the playback process module, and a module configured to determine whether the resource file is decrypted, to encrypt the decrypted resource file, to write the encrypted resource file over the decrypted resource file, to update the management information, and to send the encrypted resource file to the storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.