Optical disc with copy protection file system format and method of making such disc
US9502067B1 · kind B1 · utility
0Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2016 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Apr 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1217
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an improved file system format for an optical disc to help prevent illegal copying of multimedia content, where certain non-readable data record is placed into increased measured length of a multimedia data block; disc made pursuant to present format allows normal playback with very low level noise that would not affect the user enjoyment of viewing/listening the movie or music content on the multimedia disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.