File management device and method thereof, and audio visual data recording/reproducing device and method thereof
US6694339B1 · kind B1 · utility
10Cited by
19References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Mar 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99954
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium is logically divided to form a cluster. Each cluster records AV (Audio Visual) data. A reference number indicates the number of files which reference AV data. A free space byte map having the reference number is used for determining whether to enable or disable deletion of AV data on a cluster basis. That is, a cluster having the reference number 0 is released as a free area, thus facilitating management of a file and realizing effective use of a recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.