Recording/playback apparatus, recording/playback method, presentation medium and recording medium
US6385152B1 · kind B1 · utility
13Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
With append_only_flag reset to 0, data is recorded over existing data on a disc in accordance with the value of volume_write_protect_level. With append_only_flag set to 1, on the other hand, data can not be recorded over existing data on the disc but can be appended to already recorded data in a range defined by the value of volume_write_protect_level. As a result, it is possible to prevent new data from being written over already recorded data by mistake and to utilize the recording area of the disc efficiently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.