Information recording medium, apparatus for recording the same and apparatus for reproducing the same
US5729516A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1997 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Mar 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/877
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a recording medium such as a DVD, various information such as video and audio information is recorded in a form of a plurality of recorded information pieces. Further, control information pieces prescribe the manner of reproducing the recorded information pieces. Copy information indicating whether or not the recorded information pieces are copy-prohibited is prepared and recorded for each of the recorded information pieces. In addition, aggregate copy information pieces indicating whether or not the recorded information pieces under the control by the control information piece are copy-prohibited are recorded. In accordance with the copy information and the aggregate copy information pieces, a copying system performs accurate copy management.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.