Information recording medium, having data and management portions, and an apparatus for reproducing information from the medium
US6122434A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/877
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording medium is recorded with a plurality of data groups, each including at least one of video information and audio information and a reproduction permission level by which a reproduction of at least one of the video information and the audio information is permitted; and a reproduction management information including the reproduction permission range information for prescribing the range of the reproduction permission level for the data group which reproduction is permitted. When the reproduction permission level and the reproduction management information are selected, the range of the reproduction permission level of the data groups which reproduction are permitted is detected on the basis of the reproduction permission level selected. Then, the data group is reproduced when the reproduction permission level of the selected data group is included in the range of the reproduction permission level detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.